diff --git a/esphome/components/script/script.h b/esphome/components/script/script.h
index 847fab02bd..84485fcfa4 100644
--- a/esphome/components/script/script.h
+++ b/esphome/components/script/script.h
@@ -207,7 +207,7 @@ template<typename... Ts> class ParallelScript : public Script<Ts...> {
 
 template<class S, typename... Ts> class ScriptExecuteAction;
 
-template<class... As, typename... Ts> class ScriptExecuteAction<Script<As...>, Ts...> : public Action<Ts...> {
+template<class... As, typename... Ts> class ScriptExecuteAction<Script<As...>, Ts...> final : public Action<Ts...> {
  public:
   ScriptExecuteAction(Script<As...> *script) : script_(script) {}
 
@@ -245,7 +245,7 @@ template<class... As, typename... Ts> class ScriptExecuteAction<Script<As...>, T
   Args args_;
 };
 
-template<class C, typename... Ts> class ScriptStopAction : public Action<Ts...> {
+template<class C, typename... Ts> class ScriptStopAction final : public Action<Ts...> {
  public:
   ScriptStopAction(C *script) : script_(script) {}
 
@@ -255,7 +255,7 @@ template<class C, typename... Ts> class ScriptStopAction : public Action<Ts...>
   C *script_;
 };
 
-template<class C, typename... Ts> class IsRunningCondition : public Condition<Ts...> {
+template<class C, typename... Ts> class IsRunningCondition final : public Condition<Ts...> {
  public:
   explicit IsRunningCondition(C *parent) : parent_(parent) {}
 
@@ -272,7 +272,7 @@ template<class C, typename... Ts> class IsRunningCondition : public Condition<Ts
  * (e.g., rapid button presses, high-frequency sensor updates), so we use
  * queue-based storage for correctness.
  */
-template<class C, typename... Ts> class ScriptWaitAction : public Action<Ts...>, public Component {
+template<class C, typename... Ts> class ScriptWaitAction final : public Action<Ts...>, public Component {
  public:
   ScriptWaitAction(C *script) : script_(script) {}
 
diff --git a/esphome/components/sdl/sdl_esphome.h b/esphome/components/sdl/sdl_esphome.h
index a5ebf44c38..635eb1e3f8 100644
--- a/esphome/components/sdl/sdl_esphome.h
+++ b/esphome/components/sdl/sdl_esphome.h
@@ -13,7 +13,7 @@ namespace esphome::sdl {
 
 constexpr static const char *const TAG = "sdl";
 
-class Sdl : public display::Display {
+class Sdl final : public display::Display {
  public:
   display::DisplayType get_display_type() override { return display::DISPLAY_TYPE_COLOR; }
   void update() override;
diff --git a/esphome/components/sdl/touchscreen/sdl_touchscreen.h b/esphome/components/sdl/touchscreen/sdl_touchscreen.h
index cf2fd65088..50a584949b 100644
--- a/esphome/components/sdl/touchscreen/sdl_touchscreen.h
+++ b/esphome/components/sdl/touchscreen/sdl_touchscreen.h
@@ -6,7 +6,7 @@
 
 namespace esphome::sdl {
 
-class SdlTouchscreen : public touchscreen::Touchscreen, public Parented<Sdl> {
+class SdlTouchscreen final : public touchscreen::Touchscreen, public Parented<Sdl> {
  public:
   void setup() override {
     this->x_raw_max_ = this->display_->get_width();
diff --git a/esphome/components/sdm_meter/sdm_meter.h b/esphome/components/sdm_meter/sdm_meter.h
index e729e29d6c..a4dbde016c 100644
--- a/esphome/components/sdm_meter/sdm_meter.h
+++ b/esphome/components/sdm_meter/sdm_meter.h
@@ -8,7 +8,7 @@
 
 namespace esphome::sdm_meter {
 
-class SDMMeter : public PollingComponent, public modbus::ModbusDevice {
+class SDMMeter final : public PollingComponent, public modbus::ModbusDevice {
  public:
   void set_voltage_sensor(uint8_t phase, sensor::Sensor *voltage_sensor) {
     this->phases_[phase].setup = true;
diff --git a/esphome/components/sdp3x/sdp3x.h b/esphome/components/sdp3x/sdp3x.h
index c4ef6a4a1e..19c8d0f678 100644
--- a/esphome/components/sdp3x/sdp3x.h
+++ b/esphome/components/sdp3x/sdp3x.h
@@ -8,7 +8,9 @@ namespace esphome::sdp3x {
 
 enum MeasurementMode { MASS_FLOW_AVG, DP_AVG };
 
-class SDP3XComponent : public PollingComponent, public sensirion_common::SensirionI2CDevice, public sensor::Sensor {
+class SDP3XComponent final : public PollingComponent,
+                             public sensirion_common::SensirionI2CDevice,
+                             public sensor::Sensor {
  public:
   /// Schedule temperature+pressure readings.
   void update() override;
diff --git a/esphome/components/sds011/sds011.h b/esphome/components/sds011/sds011.h
index 56d46d118f..4f4571ab69 100644
--- a/esphome/components/sds011/sds011.h
+++ b/esphome/components/sds011/sds011.h
@@ -7,7 +7,7 @@
 
 namespace esphome::sds011 {
 
-class SDS011Component : public Component, public uart::UARTDevice {
+class SDS011Component final : public Component, public uart::UARTDevice {
  public:
   SDS011Component() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/button/custom_mode_end_button.h b/esphome/components/seeed_mr24hpc1/button/custom_mode_end_button.h
index bc98bb93b6..fc0cbbdc76 100644
--- a/esphome/components/seeed_mr24hpc1/button/custom_mode_end_button.h
+++ b/esphome/components/seeed_mr24hpc1/button/custom_mode_end_button.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class CustomSetEndButton : public button::Button, public Parented<MR24HPC1Component> {
+class CustomSetEndButton final : public button::Button, public Parented<MR24HPC1Component> {
  public:
   CustomSetEndButton() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/button/restart_button.h b/esphome/components/seeed_mr24hpc1/button/restart_button.h
index 49a4f46138..c6c530004b 100644
--- a/esphome/components/seeed_mr24hpc1/button/restart_button.h
+++ b/esphome/components/seeed_mr24hpc1/button/restart_button.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class RestartButton : public button::Button, public Parented<MR24HPC1Component> {
+class RestartButton final : public button::Button, public Parented<MR24HPC1Component> {
  public:
   RestartButton() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/custom_mode_number.h b/esphome/components/seeed_mr24hpc1/number/custom_mode_number.h
index f51e592fc0..842530a379 100644
--- a/esphome/components/seeed_mr24hpc1/number/custom_mode_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/custom_mode_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class CustomModeNumber : public number::Number, public Parented<MR24HPC1Component> {
+class CustomModeNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   CustomModeNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/custom_unman_time_number.h b/esphome/components/seeed_mr24hpc1/number/custom_unman_time_number.h
index 281e727a36..0ef2073195 100644
--- a/esphome/components/seeed_mr24hpc1/number/custom_unman_time_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/custom_unman_time_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class CustomUnmanTimeNumber : public number::Number, public Parented<MR24HPC1Component> {
+class CustomUnmanTimeNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   CustomUnmanTimeNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/existence_threshold_number.h b/esphome/components/seeed_mr24hpc1/number/existence_threshold_number.h
index c811b2d6b6..11aa45a6dc 100644
--- a/esphome/components/seeed_mr24hpc1/number/existence_threshold_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/existence_threshold_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class ExistenceThresholdNumber : public number::Number, public Parented<MR24HPC1Component> {
+class ExistenceThresholdNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   ExistenceThresholdNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/motion_threshold_number.h b/esphome/components/seeed_mr24hpc1/number/motion_threshold_number.h
index 748119f198..01f62f67fb 100644
--- a/esphome/components/seeed_mr24hpc1/number/motion_threshold_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/motion_threshold_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class MotionThresholdNumber : public number::Number, public Parented<MR24HPC1Component> {
+class MotionThresholdNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   MotionThresholdNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/motion_trigger_time_number.h b/esphome/components/seeed_mr24hpc1/number/motion_trigger_time_number.h
index dd7947b2a5..44cf89837e 100644
--- a/esphome/components/seeed_mr24hpc1/number/motion_trigger_time_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/motion_trigger_time_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class MotionTriggerTimeNumber : public number::Number, public Parented<MR24HPC1Component> {
+class MotionTriggerTimeNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   MotionTriggerTimeNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/motiontorest_time_number.h b/esphome/components/seeed_mr24hpc1/number/motiontorest_time_number.h
index 47493e7954..c12f14e79f 100644
--- a/esphome/components/seeed_mr24hpc1/number/motiontorest_time_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/motiontorest_time_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class MotionToRestTimeNumber : public number::Number, public Parented<MR24HPC1Component> {
+class MotionToRestTimeNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   MotionToRestTimeNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/number/sensitivity_number.h b/esphome/components/seeed_mr24hpc1/number/sensitivity_number.h
index c1d5435151..954c004e67 100644
--- a/esphome/components/seeed_mr24hpc1/number/sensitivity_number.h
+++ b/esphome/components/seeed_mr24hpc1/number/sensitivity_number.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class SensitivityNumber : public number::Number, public Parented<MR24HPC1Component> {
+class SensitivityNumber final : public number::Number, public Parented<MR24HPC1Component> {
  public:
   SensitivityNumber() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/seeed_mr24hpc1.h b/esphome/components/seeed_mr24hpc1/seeed_mr24hpc1.h
index b62504ba0e..b231bab33e 100644
--- a/esphome/components/seeed_mr24hpc1/seeed_mr24hpc1.h
+++ b/esphome/components/seeed_mr24hpc1/seeed_mr24hpc1.h
@@ -92,8 +92,8 @@ static const char *const S_BOUNDARY_STR[10] = {"0.5m", "1.0m", "1.5m", "2.0m", "
                                                "3.0m", "3.5m", "4.0m", "4.5m", "5.0m"};                // uint: m
 static const float S_PRESENCE_OF_DETECTION_RANGE_STR[7] = {0.0f, 0.5f, 1.0f, 1.5f, 2.0f, 2.5f, 3.0f};  // uint: m
 
-class MR24HPC1Component : public Component,
-                          public uart::UARTDevice {  // The class name must be the name defined by text_sensor.py
+class MR24HPC1Component final : public Component,
+                                public uart::UARTDevice {  // The class name must be the name defined by text_sensor.py
 #ifdef USE_TEXT_SENSOR
   SUB_TEXT_SENSOR(heartbeat_state)
   SUB_TEXT_SENSOR(product_model)
diff --git a/esphome/components/seeed_mr24hpc1/select/existence_boundary_select.h b/esphome/components/seeed_mr24hpc1/select/existence_boundary_select.h
index 878d0525c9..1fce716ed6 100644
--- a/esphome/components/seeed_mr24hpc1/select/existence_boundary_select.h
+++ b/esphome/components/seeed_mr24hpc1/select/existence_boundary_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class ExistenceBoundarySelect : public select::Select, public Parented<MR24HPC1Component> {
+class ExistenceBoundarySelect final : public select::Select, public Parented<MR24HPC1Component> {
  public:
   ExistenceBoundarySelect() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/select/motion_boundary_select.h b/esphome/components/seeed_mr24hpc1/select/motion_boundary_select.h
index eecdef2019..721bc67f69 100644
--- a/esphome/components/seeed_mr24hpc1/select/motion_boundary_select.h
+++ b/esphome/components/seeed_mr24hpc1/select/motion_boundary_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class MotionBoundarySelect : public select::Select, public Parented<MR24HPC1Component> {
+class MotionBoundarySelect final : public select::Select, public Parented<MR24HPC1Component> {
  public:
   MotionBoundarySelect() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/select/scene_mode_select.h b/esphome/components/seeed_mr24hpc1/select/scene_mode_select.h
index 377c61b32f..40e365aa7b 100644
--- a/esphome/components/seeed_mr24hpc1/select/scene_mode_select.h
+++ b/esphome/components/seeed_mr24hpc1/select/scene_mode_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class SceneModeSelect : public select::Select, public Parented<MR24HPC1Component> {
+class SceneModeSelect final : public select::Select, public Parented<MR24HPC1Component> {
  public:
   SceneModeSelect() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/select/unman_time_select.h b/esphome/components/seeed_mr24hpc1/select/unman_time_select.h
index e68ae5e54f..bba5363565 100644
--- a/esphome/components/seeed_mr24hpc1/select/unman_time_select.h
+++ b/esphome/components/seeed_mr24hpc1/select/unman_time_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class UnmanTimeSelect : public select::Select, public Parented<MR24HPC1Component> {
+class UnmanTimeSelect final : public select::Select, public Parented<MR24HPC1Component> {
  public:
   UnmanTimeSelect() = default;
 
diff --git a/esphome/components/seeed_mr24hpc1/switch/underlyFuc_switch.h b/esphome/components/seeed_mr24hpc1/switch/underlyFuc_switch.h
index 3224640ce7..8b8dbdf5de 100644
--- a/esphome/components/seeed_mr24hpc1/switch/underlyFuc_switch.h
+++ b/esphome/components/seeed_mr24hpc1/switch/underlyFuc_switch.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr24hpc1 {
 
-class UnderlyOpenFunctionSwitch : public switch_::Switch, public Parented<MR24HPC1Component> {
+class UnderlyOpenFunctionSwitch final : public switch_::Switch, public Parented<MR24HPC1Component> {
  public:
   UnderlyOpenFunctionSwitch() = default;
 
diff --git a/esphome/components/seeed_mr60bha2/seeed_mr60bha2.h b/esphome/components/seeed_mr60bha2/seeed_mr60bha2.h
index 008acc6a57..0ce25790cc 100644
--- a/esphome/components/seeed_mr60bha2/seeed_mr60bha2.h
+++ b/esphome/components/seeed_mr60bha2/seeed_mr60bha2.h
@@ -21,8 +21,8 @@ static const uint16_t HEART_RATE_TYPE_BUFFER = 0x0A15;
 static const uint16_t DISTANCE_TYPE_BUFFER = 0x0A16;
 static const uint16_t PRINT_CLOUD_BUFFER = 0x0A04;
 
-class MR60BHA2Component : public Component,
-                          public uart::UARTDevice {  // The class name must be the name defined by text_sensor.py
+class MR60BHA2Component final : public Component,
+                                public uart::UARTDevice {  // The class name must be the name defined by text_sensor.py
 #ifdef USE_BINARY_SENSOR
   SUB_BINARY_SENSOR(has_target);
 #endif
diff --git a/esphome/components/seeed_mr60fda2/button/get_radar_parameters_button.h b/esphome/components/seeed_mr60fda2/button/get_radar_parameters_button.h
index c1b96d5f08..7a604592c0 100644
--- a/esphome/components/seeed_mr60fda2/button/get_radar_parameters_button.h
+++ b/esphome/components/seeed_mr60fda2/button/get_radar_parameters_button.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr60fda2 {
 
-class GetRadarParametersButton : public button::Button, public Parented<MR60FDA2Component> {
+class GetRadarParametersButton final : public button::Button, public Parented<MR60FDA2Component> {
  public:
   GetRadarParametersButton() = default;
 
diff --git a/esphome/components/seeed_mr60fda2/button/reset_radar_button.h b/esphome/components/seeed_mr60fda2/button/reset_radar_button.h
index 174ef5425e..cdfb259909 100644
--- a/esphome/components/seeed_mr60fda2/button/reset_radar_button.h
+++ b/esphome/components/seeed_mr60fda2/button/reset_radar_button.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr60fda2 {
 
-class ResetRadarButton : public button::Button, public Parented<MR60FDA2Component> {
+class ResetRadarButton final : public button::Button, public Parented<MR60FDA2Component> {
  public:
   ResetRadarButton() = default;
 
diff --git a/esphome/components/seeed_mr60fda2/seeed_mr60fda2.h b/esphome/components/seeed_mr60fda2/seeed_mr60fda2.h
index 0e97447074..f231de5eec 100644
--- a/esphome/components/seeed_mr60fda2/seeed_mr60fda2.h
+++ b/esphome/components/seeed_mr60fda2/seeed_mr60fda2.h
@@ -56,8 +56,8 @@ static const char *const INSTALL_HEIGHT_STR[7] = {"2.4m", "2.5m", "2.6", "2.7m",
 static const char *const HEIGHT_THRESHOLD_STR[7] = {"0.0m", "0.1m", "0.2m", "0.3m", "0.4m", "0.5m", "0.6m"};
 static const char *const SENSITIVITY_STR[3] = {"1", "2", "3"};
 
-class MR60FDA2Component : public Component,
-                          public uart::UARTDevice {  // The class name must be the name defined by text_sensor.py
+class MR60FDA2Component final : public Component,
+                                public uart::UARTDevice {  // The class name must be the name defined by text_sensor.py
 #ifdef USE_BINARY_SENSOR
   SUB_BINARY_SENSOR(people_exist)
   SUB_BINARY_SENSOR(fall_detected)
diff --git a/esphome/components/seeed_mr60fda2/select/height_threshold_select.h b/esphome/components/seeed_mr60fda2/select/height_threshold_select.h
index 0e49576658..0c93085337 100644
--- a/esphome/components/seeed_mr60fda2/select/height_threshold_select.h
+++ b/esphome/components/seeed_mr60fda2/select/height_threshold_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr60fda2 {
 
-class HeightThresholdSelect : public select::Select, public Parented<MR60FDA2Component> {
+class HeightThresholdSelect final : public select::Select, public Parented<MR60FDA2Component> {
  public:
   HeightThresholdSelect() = default;
 
diff --git a/esphome/components/seeed_mr60fda2/select/install_height_select.h b/esphome/components/seeed_mr60fda2/select/install_height_select.h
index c1e2a3eeb1..964edfa127 100644
--- a/esphome/components/seeed_mr60fda2/select/install_height_select.h
+++ b/esphome/components/seeed_mr60fda2/select/install_height_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr60fda2 {
 
-class InstallHeightSelect : public select::Select, public Parented<MR60FDA2Component> {
+class InstallHeightSelect final : public select::Select, public Parented<MR60FDA2Component> {
  public:
   InstallHeightSelect() = default;
 
diff --git a/esphome/components/seeed_mr60fda2/select/sensitivity_select.h b/esphome/components/seeed_mr60fda2/select/sensitivity_select.h
index f2e0307dc1..1d96257871 100644
--- a/esphome/components/seeed_mr60fda2/select/sensitivity_select.h
+++ b/esphome/components/seeed_mr60fda2/select/sensitivity_select.h
@@ -5,7 +5,7 @@
 
 namespace esphome::seeed_mr60fda2 {
 
-class SensitivitySelect : public select::Select, public Parented<MR60FDA2Component> {
+class SensitivitySelect final : public select::Select, public Parented<MR60FDA2Component> {
  public:
   SensitivitySelect() = default;
 
diff --git a/esphome/components/selec_meter/selec_meter.h b/esphome/components/selec_meter/selec_meter.h
index 159acab124..6b5552a098 100644
--- a/esphome/components/selec_meter/selec_meter.h
+++ b/esphome/components/selec_meter/selec_meter.h
@@ -15,7 +15,7 @@ namespace esphome::selec_meter {
  public: \
   void set_##name##_sensor(sensor::Sensor *(name)) { this->name##_sensor_ = name; }
 
-class SelecMeter : public PollingComponent, public modbus::ModbusDevice {
+class SelecMeter final : public PollingComponent, public modbus::ModbusDevice {
  public:
   SELEC_METER_SENSOR(total_active_energy)
   SELEC_METER_SENSOR(import_active_energy)
diff --git a/esphome/components/select/automation.h b/esphome/components/select/automation.h
index ffdabd5f7c..8e5da893ad 100644
--- a/esphome/components/select/automation.h
+++ b/esphome/components/select/automation.h
@@ -6,7 +6,7 @@
 
 namespace esphome::select {
 
-class SelectStateTrigger : public Trigger<StringRef, size_t> {
+class SelectStateTrigger final : public Trigger<StringRef, size_t> {
  public:
   explicit SelectStateTrigger(Select *parent) : parent_(parent) {
     parent->add_on_state_callback(
@@ -17,7 +17,7 @@ class SelectStateTrigger : public Trigger<StringRef, size_t> {
   Select *parent_;
 };
 
-template<typename... Ts> class SelectSetAction : public Action<Ts...> {
+template<typename... Ts> class SelectSetAction final : public Action<Ts...> {
  public:
   explicit SelectSetAction(Select *select) : select_(select) {}
   TEMPLATABLE_VALUE(std::string, option)
@@ -32,7 +32,7 @@ template<typename... Ts> class SelectSetAction : public Action<Ts...> {
   Select *select_;
 };
 
-template<typename... Ts> class SelectSetIndexAction : public Action<Ts...> {
+template<typename... Ts> class SelectSetIndexAction final : public Action<Ts...> {
  public:
   explicit SelectSetIndexAction(Select *select) : select_(select) {}
   TEMPLATABLE_VALUE(size_t, index)
@@ -47,7 +47,7 @@ template<typename... Ts> class SelectSetIndexAction : public Action<Ts...> {
   Select *select_;
 };
 
-template<typename... Ts> class SelectOperationAction : public Action<Ts...> {
+template<typename... Ts> class SelectOperationAction final : public Action<Ts...> {
  public:
   explicit SelectOperationAction(Select *select) : select_(select) {}
   TEMPLATABLE_VALUE(bool, cycle)
@@ -66,7 +66,7 @@ template<typename... Ts> class SelectOperationAction : public Action<Ts...> {
   Select *select_;
 };
 
-template<size_t N, typename... Ts> class SelectIsCondition : public Condition<Ts...> {
+template<size_t N, typename... Ts> class SelectIsCondition final : public Condition<Ts...> {
  public:
   SelectIsCondition(Select *parent, const char *const *option_list) : parent_(parent), option_list_(option_list) {}
 
@@ -85,7 +85,7 @@ template<size_t N, typename... Ts> class SelectIsCondition : public Condition<Ts
   const char *const *option_list_;
 };
 
-template<typename... Ts> class SelectIsCondition<0, Ts...> : public Condition<Ts...> {
+template<typename... Ts> class SelectIsCondition<0, Ts...> final : public Condition<Ts...> {
  public:
   SelectIsCondition(Select *parent, std::function<bool(const StringRef &, const Ts &...)> &&f)
       : parent_(parent), f_(f) {}
diff --git a/esphome/components/sen0321/sen0321.h b/esphome/components/sen0321/sen0321.h
index 6d5aa20a61..ed7df3fcaf 100644
--- a/esphome/components/sen0321/sen0321.h
+++ b/esphome/components/sen0321/sen0321.h
@@ -20,7 +20,7 @@ static const uint8_t SET_REGISTER = 0x04;
 static const uint8_t SENSOR_PASS_READ_REG = 0x07;
 static const uint8_t SENSOR_AUTO_READ_REG = 0x09;
 
-class Sen0321Sensor : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
+class Sen0321Sensor final : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
  public:
   void update() override;
   void dump_config() override;
diff --git a/esphome/components/sen21231/sen21231.h b/esphome/components/sen21231/sen21231.h
index 486a9473d2..ad05966011 100644
--- a/esphome/components/sen21231/sen21231.h
+++ b/esphome/components/sen21231/sen21231.h
@@ -63,7 +63,7 @@ using person_sensor_results_t = struct __attribute__((__packed__)) {
   uint16_t checksum;                                          // Bytes 38-39.
 };
 
-class Sen21231Sensor : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
+class Sen21231Sensor final : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
  public:
   void update() override;
   void dump_config() override;
diff --git a/esphome/components/sen5x/automation.h b/esphome/components/sen5x/automation.h
index e6111f4a8f..21d938c4fe 100644
--- a/esphome/components/sen5x/automation.h
+++ b/esphome/components/sen5x/automation.h
@@ -6,7 +6,7 @@
 
 namespace esphome::sen5x {
 
-template<typename... Ts> class StartFanAction : public Action<Ts...> {
+template<typename... Ts> class StartFanAction final : public Action<Ts...> {
  public:
   explicit StartFanAction(SEN5XComponent *sen5x) : sen5x_(sen5x) {}
 
diff --git a/esphome/components/sen5x/sen5x.h b/esphome/components/sen5x/sen5x.h
index ec8f9cc544..6b5a1f8510 100644
--- a/esphome/components/sen5x/sen5x.h
+++ b/esphome/components/sen5x/sen5x.h
@@ -44,7 +44,7 @@ struct TemperatureCompensation {
 // Prevents wear of the flash because of too many write operations
 static const uint32_t SHORTEST_BASELINE_STORE_INTERVAL = 2 * 60 * 60 * 1000;
 
-class SEN5XComponent : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SEN5XComponent final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/sen6x/sen6x.h b/esphome/components/sen6x/sen6x.h
index bc44611882..041bf3b1aa 100644
--- a/esphome/components/sen6x/sen6x.h
+++ b/esphome/components/sen6x/sen6x.h
@@ -6,7 +6,7 @@
 
 namespace esphome::sen6x {
 
-class SEN6XComponent : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SEN6XComponent final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
   SUB_SENSOR(pm_1_0)
   SUB_SENSOR(pm_2_5)
   SUB_SENSOR(pm_4_0)
diff --git a/esphome/components/sendspin/automation.h b/esphome/components/sendspin/automation.h
index be3b1eb39d..0b408b1235 100644
--- a/esphome/components/sendspin/automation.h
+++ b/esphome/components/sendspin/automation.h
@@ -10,7 +10,7 @@
 namespace esphome::sendspin_ {
 
 #ifdef USE_SENDSPIN_CONTROLLER
-template<typename... Ts> class SendspinSwitchCommandAction : public Action<Ts...>, public Parented<SendspinHub> {
+template<typename... Ts> class SendspinSwitchCommandAction final : public Action<Ts...>, public Parented<SendspinHub> {
  public:
   void play(const Ts &...x) override {
     // Clear any EXTERNAL_SOURCE state so the switch command is followed
diff --git a/esphome/components/sendspin/media_player/sendspin_media_player.h b/esphome/components/sendspin/media_player/sendspin_media_player.h
index 52786d6d7b..651e1562be 100644
--- a/esphome/components/sendspin/media_player/sendspin_media_player.h
+++ b/esphome/components/sendspin/media_player/sendspin_media_player.h
@@ -9,7 +9,7 @@
 
 namespace esphome::sendspin_ {
 
-class SendspinMediaPlayer : public SendspinChild, public media_player::MediaPlayer {
+class SendspinMediaPlayer final : public SendspinChild, public media_player::MediaPlayer {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/sendspin/media_source/automations.h b/esphome/components/sendspin/media_source/automations.h
index 08d2b2004b..f5c35f107a 100644
--- a/esphome/components/sendspin/media_source/automations.h
+++ b/esphome/components/sendspin/media_source/automations.h
@@ -10,13 +10,13 @@
 namespace esphome::sendspin_ {
 
 template<typename... Ts>
-class EnableStaticDelayAdjustmentAction : public Action<Ts...>, public Parented<SendspinMediaSource> {
+class EnableStaticDelayAdjustmentAction final : public Action<Ts...>, public Parented<SendspinMediaSource> {
  public:
   void play(const Ts &...x) override { this->parent_->set_static_delay_adjustable(true); }
 };
 
 template<typename... Ts>
-class DisableStaticDelayAdjustmentAction : public Action<Ts...>, public Parented<SendspinMediaSource> {
+class DisableStaticDelayAdjustmentAction final : public Action<Ts...>, public Parented<SendspinMediaSource> {
  public:
   void play(const Ts &...x) override { this->parent_->set_static_delay_adjustable(false); }
 };
diff --git a/esphome/components/sendspin/media_source/sendspin_media_source.h b/esphome/components/sendspin/media_source/sendspin_media_source.h
index 843578783e..1c5cb625bf 100644
--- a/esphome/components/sendspin/media_source/sendspin_media_source.h
+++ b/esphome/components/sendspin/media_source/sendspin_media_source.h
@@ -17,9 +17,9 @@ namespace esphome::sendspin_ {
 /// Implements PlayerRoleListener to receive audio data from the sendspin-cpp library's
 /// SyncTask and bridges it to ESPHome's MediaSource output pipeline. Also forwards
 /// transport commands to the hub's controller role.
-class SendspinMediaSource : public SendspinChild,
-                            public media_source::MediaSource,
-                            public sendspin::PlayerRoleListener {
+class SendspinMediaSource final : public SendspinChild,
+                                  public media_source::MediaSource,
+                                  public sendspin::PlayerRoleListener {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/sendspin/sensor/sendspin_sensor.h b/esphome/components/sendspin/sensor/sendspin_sensor.h
index cbfe1742c9..5b29fff55f 100644
--- a/esphome/components/sendspin/sensor/sendspin_sensor.h
+++ b/esphome/components/sendspin/sensor/sendspin_sensor.h
@@ -11,7 +11,7 @@
 
 namespace esphome::sendspin_ {
 
-class SendspinTrackProgressSensor : public sensor::Sensor, public SendspinPollingChild {
+class SendspinTrackProgressSensor final : public sensor::Sensor, public SendspinPollingChild {
  public:
   void dump_config() override;
   void setup() override;
@@ -24,7 +24,7 @@ enum class SendspinNumericMetadataTypes {
   TRACK,
 };
 
-class SendspinMetadataSensor : public sensor::Sensor, public SendspinChild {
+class SendspinMetadataSensor final : public sensor::Sensor, public SendspinChild {
  public:
   void dump_config() override;
   void setup() override;
diff --git a/esphome/components/sendspin/text_sensor/sendspin_text_sensor.h b/esphome/components/sendspin/text_sensor/sendspin_text_sensor.h
index 203b01d024..d38f360d94 100644
--- a/esphome/components/sendspin/text_sensor/sendspin_text_sensor.h
+++ b/esphome/components/sendspin/text_sensor/sendspin_text_sensor.h
@@ -18,7 +18,7 @@ enum class SendspinTextMetadataTypes {
   ALBUM_ARTIST,
 };
 
-class SendspinTextSensor : public SendspinChild, public text_sensor::TextSensor {
+class SendspinTextSensor final : public SendspinChild, public text_sensor::TextSensor {
  public:
   void dump_config() override;
   void setup() override;
diff --git a/esphome/components/senseair/senseair.h b/esphome/components/senseair/senseair.h
index 333c003f48..48154a53d9 100644
--- a/esphome/components/senseair/senseair.h
+++ b/esphome/components/senseair/senseair.h
@@ -18,7 +18,7 @@ enum SenseAirStatus : uint8_t {
   RESERVED = 1 << 7
 };
 
-class SenseAirComponent : public PollingComponent, public uart::UARTDevice {
+class SenseAirComponent final : public PollingComponent, public uart::UARTDevice {
  public:
   void set_co2_sensor(sensor::Sensor *co2_sensor) { co2_sensor_ = co2_sensor; }
 
@@ -37,7 +37,7 @@ class SenseAirComponent : public PollingComponent, public uart::UARTDevice {
   sensor::Sensor *co2_sensor_{nullptr};
 };
 
-template<typename... Ts> class SenseAirBackgroundCalibrationAction : public Action<Ts...> {
+template<typename... Ts> class SenseAirBackgroundCalibrationAction final : public Action<Ts...> {
  public:
   SenseAirBackgroundCalibrationAction(SenseAirComponent *senseair) : senseair_(senseair) {}
 
@@ -47,7 +47,7 @@ template<typename... Ts> class SenseAirBackgroundCalibrationAction : public Acti
   SenseAirComponent *senseair_;
 };
 
-template<typename... Ts> class SenseAirBackgroundCalibrationResultAction : public Action<Ts...> {
+template<typename... Ts> class SenseAirBackgroundCalibrationResultAction final : public Action<Ts...> {
  public:
   SenseAirBackgroundCalibrationResultAction(SenseAirComponent *senseair) : senseair_(senseair) {}
 
@@ -57,7 +57,7 @@ template<typename... Ts> class SenseAirBackgroundCalibrationResultAction : publi
   SenseAirComponent *senseair_;
 };
 
-template<typename... Ts> class SenseAirABCEnableAction : public Action<Ts...> {
+template<typename... Ts> class SenseAirABCEnableAction final : public Action<Ts...> {
  public:
   SenseAirABCEnableAction(SenseAirComponent *senseair) : senseair_(senseair) {}
 
@@ -67,7 +67,7 @@ template<typename... Ts> class SenseAirABCEnableAction : public Action<Ts...> {
   SenseAirComponent *senseair_;
 };
 
-template<typename... Ts> class SenseAirABCDisableAction : public Action<Ts...> {
+template<typename... Ts> class SenseAirABCDisableAction final : public Action<Ts...> {
  public:
   SenseAirABCDisableAction(SenseAirComponent *senseair) : senseair_(senseair) {}
 
@@ -77,7 +77,7 @@ template<typename... Ts> class SenseAirABCDisableAction : public Action<Ts...> {
   SenseAirComponent *senseair_;
 };
 
-template<typename... Ts> class SenseAirABCGetPeriodAction : public Action<Ts...> {
+template<typename... Ts> class SenseAirABCGetPeriodAction final : public Action<Ts...> {
  public:
   SenseAirABCGetPeriodAction(SenseAirComponent *senseair) : senseair_(senseair) {}
 
diff --git a/esphome/components/sensor/automation.h b/esphome/components/sensor/automation.h
index 37578f5320..35a4a29e0d 100644
--- a/esphome/components/sensor/automation.h
+++ b/esphome/components/sensor/automation.h
@@ -6,21 +6,21 @@
 
 namespace esphome::sensor {
 
-class SensorStateTrigger : public Trigger<float> {
+class SensorStateTrigger final : public Trigger<float> {
  public:
   explicit SensorStateTrigger(Sensor *parent) {
     parent->add_on_state_callback([this](float value) { this->trigger(value); });
   }
 };
 
-class SensorRawStateTrigger : public Trigger<float> {
+class SensorRawStateTrigger final : public Trigger<float> {
  public:
   explicit SensorRawStateTrigger(Sensor *parent) {
     parent->add_on_raw_state_callback([this](float value) { this->trigger(value); });
   }
 };
 
-template<typename... Ts> class SensorPublishAction : public Action<Ts...> {
+template<typename... Ts> class SensorPublishAction final : public Action<Ts...> {
  public:
   SensorPublishAction(Sensor *sensor) : sensor_(sensor) {}
   TEMPLATABLE_VALUE(float, state)
@@ -31,7 +31,7 @@ template<typename... Ts> class SensorPublishAction : public Action<Ts...> {
   Sensor *sensor_;
 };
 
-class ValueRangeTrigger : public Trigger<float>, public Component {
+class ValueRangeTrigger final : public Trigger<float>, public Component {
  public:
   explicit ValueRangeTrigger(Sensor *parent) : parent_(parent) {}
 
@@ -83,7 +83,7 @@ class ValueRangeTrigger : public Trigger<float>, public Component {
   TemplatableFn<float, float> max_{[](float) -> float { return NAN; }};
 };
 
-template<typename... Ts> class SensorInRangeCondition : public Condition<Ts...> {
+template<typename... Ts> class SensorInRangeCondition final : public Condition<Ts...> {
  public:
   SensorInRangeCondition(Sensor *parent) : parent_(parent) {}
 
diff --git a/esphome/components/serial_proxy/serial_proxy.h b/esphome/components/serial_proxy/serial_proxy.h
index c435787a61..e35fab3d42 100644
--- a/esphome/components/serial_proxy/serial_proxy.h
+++ b/esphome/components/serial_proxy/serial_proxy.h
@@ -41,7 +41,7 @@ enum SerialProxyLineStateFlag : uint32_t {
 /// Maximum bytes to read from UART in a single loop iteration
 inline constexpr size_t SERIAL_PROXY_MAX_READ_SIZE = 256;
 
-class SerialProxy : public uart::UARTDevice, public Component {
+class SerialProxy final : public uart::UARTDevice, public Component {
  public:
   void setup() override;
   void loop() override;
diff --git a/esphome/components/servo/servo.h b/esphome/components/servo/servo.h
index 31e9357947..156dab6dc1 100644
--- a/esphome/components/servo/servo.h
+++ b/esphome/components/servo/servo.h
@@ -10,7 +10,7 @@ namespace esphome::servo {
 
 extern uint32_t global_servo_id;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
-class Servo : public Component {
+class Servo final : public Component {
  public:
   void set_output(output::FloatOutput *output) { output_ = output; }
   void loop() override;
@@ -51,7 +51,7 @@ class Servo : public Component {
   };
 };
 
-template<typename... Ts> class ServoWriteAction : public Action<Ts...> {
+template<typename... Ts> class ServoWriteAction final : public Action<Ts...> {
  public:
   ServoWriteAction(Servo *servo) : servo_(servo) {}
   TEMPLATABLE_VALUE(float, value)
@@ -62,7 +62,7 @@ template<typename... Ts> class ServoWriteAction : public Action<Ts...> {
   Servo *servo_;
 };
 
-template<typename... Ts> class ServoDetachAction : public Action<Ts...> {
+template<typename... Ts> class ServoDetachAction final : public Action<Ts...> {
  public:
   ServoDetachAction(Servo *servo) : servo_(servo) {}
 
diff --git a/esphome/components/sfa30/sfa30.h b/esphome/components/sfa30/sfa30.h
index d2f2520a57..13985b1a29 100644
--- a/esphome/components/sfa30/sfa30.h
+++ b/esphome/components/sfa30/sfa30.h
@@ -6,7 +6,7 @@
 
 namespace esphome::sfa30 {
 
-class SFA30Component : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SFA30Component final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
   enum ErrorCode { DEVICE_MARKING_READ_FAILED, MEASUREMENT_INIT_FAILED, UNKNOWN };
 
  public:
diff --git a/esphome/components/sgp30/sgp30.h b/esphome/components/sgp30/sgp30.h
index cb4aa1c1bb..fac3c01b58 100644
--- a/esphome/components/sgp30/sgp30.h
+++ b/esphome/components/sgp30/sgp30.h
@@ -16,7 +16,7 @@ struct SGP30Baselines {
 } PACKED;
 
 /// This class implements support for the Sensirion SGP30 i2c GAS (VOC and CO2eq) sensors.
-class SGP30Component : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SGP30Component final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
  public:
   void set_eco2_sensor(sensor::Sensor *eco2) { eco2_sensor_ = eco2; }
   void set_tvoc_sensor(sensor::Sensor *tvoc) { tvoc_sensor_ = tvoc; }
diff --git a/esphome/components/sgp4x/sgp4x.h b/esphome/components/sgp4x/sgp4x.h
index 23bf6319a9..a40188e629 100644
--- a/esphome/components/sgp4x/sgp4x.h
+++ b/esphome/components/sgp4x/sgp4x.h
@@ -54,7 +54,9 @@ const float MAXIMUM_STORAGE_DIFF = 50.0f;
 class SGP4xComponent;
 
 /// This class implements support for the Sensirion sgp4x i2c GAS (VOC) sensors.
-class SGP4xComponent : public PollingComponent, public sensor::Sensor, public sensirion_common::SensirionI2CDevice {
+class SGP4xComponent final : public PollingComponent,
+                             public sensor::Sensor,
+                             public sensirion_common::SensirionI2CDevice {
   enum ErrorCode {
     COMMUNICATION_FAILED,
     MEASUREMENT_INIT_FAILED,
diff --git a/esphome/components/shelly_dimmer/shelly_dimmer.h b/esphome/components/shelly_dimmer/shelly_dimmer.h
index c6d0e20afe..e3ddd7f268 100644
--- a/esphome/components/shelly_dimmer/shelly_dimmer.h
+++ b/esphome/components/shelly_dimmer/shelly_dimmer.h
@@ -12,7 +12,7 @@
 
 namespace esphome::shelly_dimmer {
 
-class ShellyDimmer : public PollingComponent, public light::LightOutput, public uart::UARTDevice {
+class ShellyDimmer final : public PollingComponent, public light::LightOutput, public uart::UARTDevice {
  private:
   static constexpr uint16_t SHELLY_DIMMER_BUFFER_SIZE = 256;
 
diff --git a/esphome/components/sht3xd/sht3xd.h b/esphome/components/sht3xd/sht3xd.h
index 6df5587507..93663118e5 100644
--- a/esphome/components/sht3xd/sht3xd.h
+++ b/esphome/components/sht3xd/sht3xd.h
@@ -7,7 +7,7 @@
 namespace esphome::sht3xd {
 
 /// This class implements support for the SHT3x-DIS family of temperature+humidity i2c sensors.
-class SHT3XDComponent : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SHT3XDComponent final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
  public:
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
   void set_humidity_sensor(sensor::Sensor *humidity_sensor) { humidity_sensor_ = humidity_sensor; }
diff --git a/esphome/components/sht4x/sht4x.h b/esphome/components/sht4x/sht4x.h
index d1fa9033df..0d5723f72a 100644
--- a/esphome/components/sht4x/sht4x.h
+++ b/esphome/components/sht4x/sht4x.h
@@ -14,7 +14,7 @@ enum SHT4XHEATERPOWER { SHT4X_HEATERPOWER_HIGH, SHT4X_HEATERPOWER_MED, SHT4X_HEA
 
 enum SHT4XHEATERTIME : uint16_t { SHT4X_HEATERTIME_LONG = 1100, SHT4X_HEATERTIME_SHORT = 110 };
 
-class SHT4XComponent : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SHT4XComponent final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/shtcx/shtcx.h b/esphome/components/shtcx/shtcx.h
index a86b204e2b..ea50a084ef 100644
--- a/esphome/components/shtcx/shtcx.h
+++ b/esphome/components/shtcx/shtcx.h
@@ -13,7 +13,7 @@ enum SHTCXType : uint8_t {
 };
 
 /// This class implements support for the SHT3x-DIS family of temperature+humidity i2c sensors.
-class SHTCXComponent : public PollingComponent, public sensirion_common::SensirionI2CDevice {
+class SHTCXComponent final : public PollingComponent, public sensirion_common::SensirionI2CDevice {
  public:
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { temperature_sensor_ = temperature_sensor; }
   void set_humidity_sensor(sensor::Sensor *humidity_sensor) { humidity_sensor_ = humidity_sensor; }
diff --git a/esphome/components/shutdown/button/shutdown_button.h b/esphome/components/shutdown/button/shutdown_button.h
index d4247ec0f9..4fc534030e 100644
--- a/esphome/components/shutdown/button/shutdown_button.h
+++ b/esphome/components/shutdown/button/shutdown_button.h
@@ -5,7 +5,7 @@
 
 namespace esphome::shutdown {
 
-class ShutdownButton : public button::Button, public Component {
+class ShutdownButton final : public button::Button, public Component {
  public:
   void dump_config() override;
 
diff --git a/esphome/components/shutdown/switch/shutdown_switch.h b/esphome/components/shutdown/switch/shutdown_switch.h
index 933345915f..bb7fea7e03 100644
--- a/esphome/components/shutdown/switch/shutdown_switch.h
+++ b/esphome/components/shutdown/switch/shutdown_switch.h
@@ -5,7 +5,7 @@
 
 namespace esphome::shutdown {
 
-class ShutdownSwitch : public switch_::Switch, public Component {
+class ShutdownSwitch final : public switch_::Switch, public Component {
  public:
   void dump_config() override;
 
diff --git a/esphome/components/sigma_delta_output/sigma_delta_output.h b/esphome/components/sigma_delta_output/sigma_delta_output.h
index a5df3c6c7c..71aedf9b07 100644
--- a/esphome/components/sigma_delta_output/sigma_delta_output.h
+++ b/esphome/components/sigma_delta_output/sigma_delta_output.h
@@ -6,7 +6,7 @@
 
 namespace esphome::sigma_delta_output {
 
-class SigmaDeltaOutput : public PollingComponent, public output::FloatOutput {
+class SigmaDeltaOutput final : public PollingComponent, public output::FloatOutput {
  public:
   Trigger<> *get_turn_on_trigger() {
     if (!this->turn_on_trigger_)
diff --git a/esphome/components/sim800l/sim800l.h b/esphome/components/sim800l/sim800l.h
index 0b3259ede0..276131cfed 100644
--- a/esphome/components/sim800l/sim800l.h
+++ b/esphome/components/sim800l/sim800l.h
@@ -46,7 +46,7 @@ enum State {
   STATE_RECEIVED_USSD
 };
 
-class Sim800LComponent : public uart::UARTDevice, public PollingComponent {
+class Sim800LComponent final : public uart::UARTDevice, public PollingComponent {
  public:
   /// Retrieve the latest sensor values. This operation takes approximately 16ms.
   void update() override;
@@ -120,7 +120,7 @@ class Sim800LComponent : public uart::UARTDevice, public PollingComponent {
   CallbackManager<void(std::string)> ussd_received_callback_;
 };
 
-template<typename... Ts> class Sim800LSendSmsAction : public Action<Ts...> {
+template<typename... Ts> class Sim800LSendSmsAction final : public Action<Ts...> {
  public:
   Sim800LSendSmsAction(Sim800LComponent *parent) : parent_(parent) {}
   TEMPLATABLE_VALUE(std::string, recipient)
@@ -136,7 +136,7 @@ template<typename... Ts> class Sim800LSendSmsAction : public Action<Ts...> {
   Sim800LComponent *parent_;
 };
 
-template<typename... Ts> class Sim800LSendUssdAction : public Action<Ts...> {
+template<typename... Ts> class Sim800LSendUssdAction final : public Action<Ts...> {
  public:
   Sim800LSendUssdAction(Sim800LComponent *parent) : parent_(parent) {}
   TEMPLATABLE_VALUE(std::string, ussd)
@@ -150,7 +150,7 @@ template<typename... Ts> class Sim800LSendUssdAction : public Action<Ts...> {
   Sim800LComponent *parent_;
 };
 
-template<typename... Ts> class Sim800LDialAction : public Action<Ts...> {
+template<typename... Ts> class Sim800LDialAction final : public Action<Ts...> {
  public:
   Sim800LDialAction(Sim800LComponent *parent) : parent_(parent) {}
   TEMPLATABLE_VALUE(std::string, recipient)
@@ -163,7 +163,7 @@ template<typename... Ts> class Sim800LDialAction : public Action<Ts...> {
  protected:
   Sim800LComponent *parent_;
 };
-template<typename... Ts> class Sim800LConnectAction : public Action<Ts...> {
+template<typename... Ts> class Sim800LConnectAction final : public Action<Ts...> {
  public:
   Sim800LConnectAction(Sim800LComponent *parent) : parent_(parent) {}
 
@@ -173,7 +173,7 @@ template<typename... Ts> class Sim800LConnectAction : public Action<Ts...> {
   Sim800LComponent *parent_;
 };
 
-template<typename... Ts> class Sim800LDisconnectAction : public Action<Ts...> {
+template<typename... Ts> class Sim800LDisconnectAction final : public Action<Ts...> {
  public:
   Sim800LDisconnectAction(Sim800LComponent *parent) : parent_(parent) {}
 
diff --git a/esphome/components/slow_pwm/slow_pwm_output.h b/esphome/components/slow_pwm/slow_pwm_output.h
index d866435af1..aa517a3bc5 100644
--- a/esphome/components/slow_pwm/slow_pwm_output.h
+++ b/esphome/components/slow_pwm/slow_pwm_output.h
@@ -6,7 +6,7 @@
 
 namespace esphome::slow_pwm {
 
-class SlowPWMOutput : public output::FloatOutput, public Component {
+class SlowPWMOutput final : public output::FloatOutput, public Component {
  public:
   void set_pin(GPIOPin *pin) { pin_ = pin; };
   void set_period(unsigned int period) { period_ = period; };