diff --git a/esphome/components/msa3xx/msa3xx.h b/esphome/components/msa3xx/msa3xx.h
index 345afc50ab..212ee10a48 100644
--- a/esphome/components/msa3xx/msa3xx.h
+++ b/esphome/components/msa3xx/msa3xx.h
@@ -211,7 +211,7 @@ union RegTapDuration {
   uint8_t raw{0x04};
 };
 
-class MSA3xxComponent : public PollingComponent, public i2c::I2CDevice {
+class MSA3xxComponent final : public PollingComponent, public i2c::I2CDevice {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/my9231/my9231.h b/esphome/components/my9231/my9231.h
index 60b113079e..ababfd7fc7 100644
--- a/esphome/components/my9231/my9231.h
+++ b/esphome/components/my9231/my9231.h
@@ -8,7 +8,7 @@
 namespace esphome::my9231 {
 
 /// MY9231 float output component.
-class MY9231OutputComponent : public Component {
+class MY9231OutputComponent final : public Component {
  public:
   class Channel;
   void set_pin_di(GPIOPin *pin_di) { pin_di_ = pin_di; }
@@ -26,7 +26,7 @@ class MY9231OutputComponent : public Component {
   /// Send new values if they were updated.
   void loop() override;
 
-  class Channel : public output::FloatOutput {
+  class Channel final : public output::FloatOutput {
    public:
     void set_parent(MY9231OutputComponent *parent) { parent_ = parent; }
     void set_channel(uint16_t channel) { channel_ = channel; }
diff --git a/esphome/components/nau7802/nau7802.h b/esphome/components/nau7802/nau7802.h
index 67f36ca677..c53a018234 100644
--- a/esphome/components/nau7802/nau7802.h
+++ b/esphome/components/nau7802/nau7802.h
@@ -47,7 +47,7 @@ enum NAU7802CalibrationModes {
   NAU7802_CALIBRATE_GAIN = 0b11,
 };
 
-class NAU7802Sensor : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
+class NAU7802Sensor final : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
  public:
   void set_samples_per_second(NAU7802SPS sps) { this->sps_ = sps; }
   void set_ldo_voltage(NAU7802LDO ldo) { this->ldo_ = ldo; }
@@ -97,18 +97,18 @@ class NAU7802Sensor : public sensor::Sensor, public PollingComponent, public i2c
 };
 
 template<typename... Ts>
-class NAU7802CalbrateExternalOffsetAction : public Action<Ts...>, public Parented<NAU7802Sensor> {
+class NAU7802CalbrateExternalOffsetAction final : public Action<Ts...>, public Parented<NAU7802Sensor> {
  public:
   void play(const Ts &...x) override { this->parent_->calibrate_external_offset(); }
 };
 
 template<typename... Ts>
-class NAU7802CalbrateInternalOffsetAction : public Action<Ts...>, public Parented<NAU7802Sensor> {
+class NAU7802CalbrateInternalOffsetAction final : public Action<Ts...>, public Parented<NAU7802Sensor> {
  public:
   void play(const Ts &...x) override { this->parent_->calibrate_internal_offset(); }
 };
 
-template<typename... Ts> class NAU7802CalbrateGainAction : public Action<Ts...>, public Parented<NAU7802Sensor> {
+template<typename... Ts> class NAU7802CalbrateGainAction final : public Action<Ts...>, public Parented<NAU7802Sensor> {
  public:
   void play(const Ts &...x) override { this->parent_->calibrate_gain(); }
 };
diff --git a/esphome/components/network/network_component.h b/esphome/components/network/network_component.h
index dde15940e4..2e76a95673 100644
--- a/esphome/components/network/network_component.h
+++ b/esphome/components/network/network_component.h
@@ -4,7 +4,7 @@
 #include "esphome/core/component.h"
 
 namespace esphome::network {
-class NetworkComponent : public Component {
+class NetworkComponent final : public Component {
  public:
   void setup() override;
   // AFTER_BLUETOOTH: BLE controller must initialize before esp_netif_init per IDF guidance.
diff --git a/esphome/components/nextion/automation.h b/esphome/components/nextion/automation.h
index e039dae615..0226c65be6 100644
--- a/esphome/components/nextion/automation.h
+++ b/esphome/components/nextion/automation.h
@@ -7,7 +7,7 @@
 
 namespace esphome::nextion {
 
-template<typename... Ts> class NextionSetBrightnessAction : public Action<Ts...> {
+template<typename... Ts> class NextionSetBrightnessAction final : public Action<Ts...> {
  public:
   explicit NextionSetBrightnessAction(Nextion *component) : component_(component) {}
 
@@ -24,7 +24,7 @@ template<typename... Ts> class NextionSetBrightnessAction : public Action<Ts...>
   Nextion *component_;
 };
 
-template<typename... Ts> class NextionPublishFloatAction : public Action<Ts...> {
+template<typename... Ts> class NextionPublishFloatAction final : public Action<Ts...> {
  public:
   explicit NextionPublishFloatAction(NextionComponent *component) : component_(component) {}
 
@@ -47,7 +47,7 @@ template<typename... Ts> class NextionPublishFloatAction : public Action<Ts...>
   NextionComponent *component_;
 };
 
-template<typename... Ts> class NextionPublishTextAction : public Action<Ts...> {
+template<typename... Ts> class NextionPublishTextAction final : public Action<Ts...> {
  public:
   explicit NextionPublishTextAction(NextionComponent *component) : component_(component) {}
 
@@ -70,7 +70,7 @@ template<typename... Ts> class NextionPublishTextAction : public Action<Ts...> {
   NextionComponent *component_;
 };
 
-template<typename... Ts> class NextionPublishBoolAction : public Action<Ts...> {
+template<typename... Ts> class NextionPublishBoolAction final : public Action<Ts...> {
  public:
   explicit NextionPublishBoolAction(NextionComponent *component) : component_(component) {}
 
diff --git a/esphome/components/nextion/binary_sensor/nextion_binarysensor.h b/esphome/components/nextion/binary_sensor/nextion_binarysensor.h
index 7637957222..9970db1c01 100644
--- a/esphome/components/nextion/binary_sensor/nextion_binarysensor.h
+++ b/esphome/components/nextion/binary_sensor/nextion_binarysensor.h
@@ -8,9 +8,9 @@ namespace esphome::nextion {
 
 class NextionBinarySensor;
 
-class NextionBinarySensor : public NextionComponent,
-                            public binary_sensor::BinarySensorInitiallyOff,
-                            public PollingComponent {
+class NextionBinarySensor final : public NextionComponent,
+                                  public binary_sensor::BinarySensorInitiallyOff,
+                                  public PollingComponent {
  public:
   NextionBinarySensor(NextionBase *nextion) { this->nextion_ = nextion; }
 
diff --git a/esphome/components/nextion/nextion.h b/esphome/components/nextion/nextion.h
index ef030e71da..d361d9725b 100644
--- a/esphome/components/nextion/nextion.h
+++ b/esphome/components/nextion/nextion.h
@@ -76,7 +76,7 @@ class NextionCommandPacer {
 };
 #endif  // USE_NEXTION_COMMAND_SPACING
 
-class Nextion : public NextionBase, public PollingComponent, public uart::UARTDevice {
+class Nextion final : public NextionBase, public PollingComponent, public uart::UARTDevice {
  public:
 #ifdef USE_NEXTION_MAX_COMMANDS_PER_LOOP
   /**
diff --git a/esphome/components/nextion/sensor/nextion_sensor.h b/esphome/components/nextion/sensor/nextion_sensor.h
index 72e3982b3a..bc0875fdff 100644
--- a/esphome/components/nextion/sensor/nextion_sensor.h
+++ b/esphome/components/nextion/sensor/nextion_sensor.h
@@ -8,7 +8,7 @@ namespace esphome::nextion {
 
 class NextionSensor;
 
-class NextionSensor : public NextionComponent, public sensor::Sensor, public PollingComponent {
+class NextionSensor final : public NextionComponent, public sensor::Sensor, public PollingComponent {
  public:
   NextionSensor(NextionBase *nextion) { this->nextion_ = nextion; }
   void send_state_to_nextion() override { this->set_state(this->state, false, true); };
diff --git a/esphome/components/nextion/switch/nextion_switch.h b/esphome/components/nextion/switch/nextion_switch.h
index 7e0593d217..2cac733b49 100644
--- a/esphome/components/nextion/switch/nextion_switch.h
+++ b/esphome/components/nextion/switch/nextion_switch.h
@@ -8,7 +8,7 @@ namespace esphome::nextion {
 
 class NextionSwitch;
 
-class NextionSwitch : public NextionComponent, public switch_::Switch, public PollingComponent {
+class NextionSwitch final : public NextionComponent, public switch_::Switch, public PollingComponent {
  public:
   NextionSwitch(NextionBase *nextion) { this->nextion_ = nextion; }
 
diff --git a/esphome/components/nextion/text_sensor/nextion_textsensor.h b/esphome/components/nextion/text_sensor/nextion_textsensor.h
index 42cd5dcef4..5ef2bb222f 100644
--- a/esphome/components/nextion/text_sensor/nextion_textsensor.h
+++ b/esphome/components/nextion/text_sensor/nextion_textsensor.h
@@ -8,7 +8,7 @@ namespace esphome::nextion {
 
 class NextionTextSensor;
 
-class NextionTextSensor : public NextionComponent, public text_sensor::TextSensor, public PollingComponent {
+class NextionTextSensor final : public NextionComponent, public text_sensor::TextSensor, public PollingComponent {
  public:
   NextionTextSensor(NextionBase *nextion) { this->nextion_ = nextion; }
   void update() override;
diff --git a/esphome/components/nfc/automation.h b/esphome/components/nfc/automation.h
index 0ac3e3b8b6..ec3a979b64 100644
--- a/esphome/components/nfc/automation.h
+++ b/esphome/components/nfc/automation.h
@@ -7,7 +7,7 @@
 
 namespace esphome::nfc {
 
-class NfcOnTagTrigger : public Trigger<std::string, NfcTag> {
+class NfcOnTagTrigger final : public Trigger<std::string, NfcTag> {
  public:
   void process(const std::unique_ptr<NfcTag> &tag);
 };
diff --git a/esphome/components/nfc/binary_sensor/nfc_binary_sensor.h b/esphome/components/nfc/binary_sensor/nfc_binary_sensor.h
index b3448a57cc..6354e16967 100644
--- a/esphome/components/nfc/binary_sensor/nfc_binary_sensor.h
+++ b/esphome/components/nfc/binary_sensor/nfc_binary_sensor.h
@@ -8,10 +8,10 @@
 
 namespace esphome::nfc {
 
-class NfcTagBinarySensor : public binary_sensor::BinarySensor,
-                           public Component,
-                           public NfcTagListener,
-                           public Parented<Nfcc> {
+class NfcTagBinarySensor final : public binary_sensor::BinarySensor,
+                                 public Component,
+                                 public NfcTagListener,
+                                 public Parented<Nfcc> {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/noblex/noblex.h b/esphome/components/noblex/noblex.h
index 62070e5dee..e505a5ba3f 100644
--- a/esphome/components/noblex/noblex.h
+++ b/esphome/components/noblex/noblex.h
@@ -8,7 +8,7 @@ namespace esphome::noblex {
 const uint8_t NOBLEX_TEMP_MIN = 16;  // Celsius
 const uint8_t NOBLEX_TEMP_MAX = 30;  // Celsius
 
-class NoblexClimate : public climate_ir::ClimateIR {
+class NoblexClimate final : public climate_ir::ClimateIR {
  public:
   NoblexClimate()
       : climate_ir::ClimateIR(NOBLEX_TEMP_MIN, NOBLEX_TEMP_MAX, 1.0f, true, true,
diff --git a/esphome/components/npi19/npi19.h b/esphome/components/npi19/npi19.h
index d1f74141ac..f18a0989de 100644
--- a/esphome/components/npi19/npi19.h
+++ b/esphome/components/npi19/npi19.h
@@ -7,7 +7,7 @@
 namespace esphome::npi19 {
 
 /// This class implements support for the npi19 pressure and temperature i2c sensors.
-class NPI19Component : public PollingComponent, public i2c::I2CDevice {
+class NPI19Component final : public PollingComponent, public i2c::I2CDevice {
  public:
   void set_temperature_sensor(sensor::Sensor *temperature_sensor) { this->temperature_sensor_ = temperature_sensor; }
   void set_raw_pressure_sensor(sensor::Sensor *raw_pressure_sensor) {
diff --git a/esphome/components/nrf52/dfu.h b/esphome/components/nrf52/dfu.h
index 82c7d9f54e..4f7ad89b18 100644
--- a/esphome/components/nrf52/dfu.h
+++ b/esphome/components/nrf52/dfu.h
@@ -6,7 +6,7 @@
 #include "esphome/core/gpio.h"
 
 namespace esphome::nrf52 {
-class DeviceFirmwareUpdate : public Component {
+class DeviceFirmwareUpdate final : public Component {
  public:
   void setup() override;
   void set_reset_pin(GPIOPin *reset) { this->reset_pin_ = reset; }
diff --git a/esphome/components/ntc/ntc.h b/esphome/components/ntc/ntc.h
index 466d03f789..25fbf3c85d 100644
--- a/esphome/components/ntc/ntc.h
+++ b/esphome/components/ntc/ntc.h
@@ -5,7 +5,7 @@
 
 namespace esphome::ntc {
 
-class NTC : public Component, public sensor::Sensor {
+class NTC final : public Component, public sensor::Sensor {
  public:
   void set_sensor(Sensor *sensor) { sensor_ = sensor; }
   void set_a(double a) { a_ = a; }
diff --git a/esphome/components/number/automation.h b/esphome/components/number/automation.h
index 2843aa6bf5..4efcfd30d8 100644
--- a/esphome/components/number/automation.h
+++ b/esphome/components/number/automation.h
@@ -6,14 +6,14 @@
 
 namespace esphome::number {
 
-class NumberStateTrigger : public Trigger<float> {
+class NumberStateTrigger final : public Trigger<float> {
  public:
   explicit NumberStateTrigger(Number *parent) {
     parent->add_on_state_callback([this](float value) { this->trigger(value); });
   }
 };
 
-template<typename... Ts> class NumberSetAction : public Action<Ts...> {
+template<typename... Ts> class NumberSetAction final : public Action<Ts...> {
  public:
   NumberSetAction(Number *number) : number_(number) {}
   TEMPLATABLE_VALUE(float, value)
@@ -28,7 +28,7 @@ template<typename... Ts> class NumberSetAction : public Action<Ts...> {
   Number *number_;
 };
 
-template<typename... Ts> class NumberOperationAction : public Action<Ts...> {
+template<typename... Ts> class NumberOperationAction final : public Action<Ts...> {
  public:
   explicit NumberOperationAction(Number *number) : number_(number) {}
   TEMPLATABLE_VALUE(NumberOperation, operation)
@@ -47,7 +47,7 @@ template<typename... Ts> class NumberOperationAction : public Action<Ts...> {
   Number *number_;
 };
 
-class ValueRangeTrigger : public Trigger<float>, public Component {
+class ValueRangeTrigger final : public Trigger<float>, public Component {
  public:
   explicit ValueRangeTrigger(Number *parent) : parent_(parent) {}
 
@@ -67,7 +67,7 @@ class ValueRangeTrigger : public Trigger<float>, public Component {
   TemplatableFn<float, float> max_{[](float) -> float { return NAN; }};
 };
 
-template<typename... Ts> class NumberInRangeCondition : public Condition<Ts...> {
+template<typename... Ts> class NumberInRangeCondition final : public Condition<Ts...> {
  public:
   NumberInRangeCondition(Number *parent) : parent_(parent) {}
 
diff --git a/esphome/components/number/sensor/number_sensor.h b/esphome/components/number/sensor/number_sensor.h
index 2d6825a298..ba3cec150c 100644
--- a/esphome/components/number/sensor/number_sensor.h
+++ b/esphome/components/number/sensor/number_sensor.h
@@ -6,7 +6,7 @@
 
 namespace esphome::number {
 
-class NumberSensor : public sensor::Sensor, public Component {
+class NumberSensor final : public sensor::Sensor, public Component {
  public:
   explicit NumberSensor(Number *source) : source_(source) {}
   void setup() override;
diff --git a/esphome/components/online_image/online_image.h b/esphome/components/online_image/online_image.h
index a967bb6c0e..3e386f8cc8 100644
--- a/esphome/components/online_image/online_image.h
+++ b/esphome/components/online_image/online_image.h
@@ -21,9 +21,9 @@ using t_http_codes = enum {
  * The image will then be stored in a buffer, so that it can be re-displayed without the
  * need to re-download or re-decode.
  */
-class OnlineImage : public PollingComponent,
-                    public runtime_image::RuntimeImage,
-                    public Parented<esphome::http_request::HttpRequestComponent> {
+class OnlineImage final : public PollingComponent,
+                          public runtime_image::RuntimeImage,
+                          public Parented<esphome::http_request::HttpRequestComponent> {
  public:
   /**
    * @brief Construct a new OnlineImage object.
@@ -104,7 +104,7 @@ class OnlineImage : public PollingComponent,
   uint32_t start_time_{0};
 };
 
-template<typename... Ts> class OnlineImageSetUrlAction : public Action<Ts...> {
+template<typename... Ts> class OnlineImageSetUrlAction final : public Action<Ts...> {
  public:
   OnlineImageSetUrlAction(OnlineImage *parent) : parent_(parent) {}
   TEMPLATABLE_VALUE(std::string, url)
@@ -120,7 +120,7 @@ template<typename... Ts> class OnlineImageSetUrlAction : public Action<Ts...> {
   OnlineImage *parent_;
 };
 
-template<typename... Ts> class OnlineImageReleaseAction : public Action<Ts...> {
+template<typename... Ts> class OnlineImageReleaseAction final : public Action<Ts...> {
  public:
   OnlineImageReleaseAction(OnlineImage *parent) : parent_(parent) {}
   void play(const Ts &...x) override { this->parent_->release(); }
diff --git a/esphome/components/opentherm/automation.h b/esphome/components/opentherm/automation.h
index aa20a4ec5a..365992b280 100644
--- a/esphome/components/opentherm/automation.h
+++ b/esphome/components/opentherm/automation.h
@@ -6,14 +6,14 @@
 
 namespace esphome::opentherm {
 
-class BeforeSendTrigger : public Trigger<OpenthermData &> {
+class BeforeSendTrigger final : public Trigger<OpenthermData &> {
  public:
   BeforeSendTrigger(OpenthermHub *hub) {
     hub->add_on_before_send_callback([this](OpenthermData &x) { this->trigger(x); });
   }
 };
 
-class BeforeProcessResponseTrigger : public Trigger<OpenthermData &> {
+class BeforeProcessResponseTrigger final : public Trigger<OpenthermData &> {
  public:
   BeforeProcessResponseTrigger(OpenthermHub *hub) {
     hub->add_on_before_process_response_callback([this](OpenthermData &x) { this->trigger(x); });
diff --git a/esphome/components/opentherm/hub.h b/esphome/components/opentherm/hub.h
index 2638137668..268c6210f0 100644
--- a/esphome/components/opentherm/hub.h
+++ b/esphome/components/opentherm/hub.h
@@ -41,7 +41,7 @@ static const uint8_t REPEATING_MESSAGE_ORDER = 255;
 static const uint8_t INITIAL_UNORDERED_MESSAGE_ORDER = 254;
 
 // OpenTherm component for ESPHome
-class OpenthermHub : public Component {
+class OpenthermHub final : public Component {
  protected:
   // Communication pins for the OpenTherm interface
   InternalGPIOPin *in_pin_, *out_pin_;
diff --git a/esphome/components/opentherm/number/opentherm_number.h b/esphome/components/opentherm/number/opentherm_number.h
index c110bed2eb..c97692ce2a 100644
--- a/esphome/components/opentherm/number/opentherm_number.h
+++ b/esphome/components/opentherm/number/opentherm_number.h
@@ -8,7 +8,7 @@
 namespace esphome::opentherm {
 
 // Just a simple number, which stores the number
-class OpenthermNumber : public number::Number, public Component, public OpenthermInput {
+class OpenthermNumber final : public number::Number, public Component, public OpenthermInput {
  protected:
   void control(float value) override;
   void setup() override;
diff --git a/esphome/components/opentherm/output/opentherm_output.h b/esphome/components/opentherm/output/opentherm_output.h
index e789d72702..24d5052076 100644
--- a/esphome/components/opentherm/output/opentherm_output.h
+++ b/esphome/components/opentherm/output/opentherm_output.h
@@ -6,7 +6,7 @@
 
 namespace esphome::opentherm {
 
-class OpenthermOutput : public output::FloatOutput, public Component, public OpenthermInput {
+class OpenthermOutput final : public output::FloatOutput, public Component, public OpenthermInput {
  protected:
   bool has_state_ = false;
   const char *id_ = nullptr;
diff --git a/esphome/components/opentherm/switch/opentherm_switch.h b/esphome/components/opentherm/switch/opentherm_switch.h
index ca930d4f7c..235bc23401 100644
--- a/esphome/components/opentherm/switch/opentherm_switch.h
+++ b/esphome/components/opentherm/switch/opentherm_switch.h
@@ -6,7 +6,7 @@
 
 namespace esphome::opentherm {
 
-class OpenthermSwitch : public switch_::Switch, public Component {
+class OpenthermSwitch final : public switch_::Switch, public Component {
  protected:
   void write_state(bool state) override;
 
diff --git a/esphome/components/openthread/openthread.h b/esphome/components/openthread/openthread.h
index 5898492a50..1a4ea9f65d 100644
--- a/esphome/components/openthread/openthread.h
+++ b/esphome/components/openthread/openthread.h
@@ -19,7 +19,7 @@ namespace esphome::openthread {
 
 class InstanceLock;
 
-class OpenThreadComponent : public Component {
+class OpenThreadComponent final : public Component {
  public:
   OpenThreadComponent();
   ~OpenThreadComponent();
@@ -67,7 +67,7 @@ class OpenThreadComponent : public Component {
 
 extern OpenThreadComponent *global_openthread_component;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
-class OpenThreadSrpComponent : public Component {
+class OpenThreadSrpComponent final : public Component {
  public:
   void set_mdns(esphome::mdns::MDNSComponent *mdns);
   // This has to run after the mdns component or else no services are available to advertise
diff --git a/esphome/components/opt3001/opt3001.h b/esphome/components/opt3001/opt3001.h
index e5de536353..92f5136bf7 100644
--- a/esphome/components/opt3001/opt3001.h
+++ b/esphome/components/opt3001/opt3001.h
@@ -7,7 +7,7 @@
 namespace esphome::opt3001 {
 
 /// This class implements support for the i2c-based OPT3001 ambient light sensor.
-class OPT3001Sensor : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
+class OPT3001Sensor final : public sensor::Sensor, public PollingComponent, public i2c::I2CDevice {
  public:
   void dump_config() override;
   void update() override;
diff --git a/esphome/components/output/automation.h b/esphome/components/output/automation.h
index 301f568388..efe775ba57 100644
--- a/esphome/components/output/automation.h
+++ b/esphome/components/output/automation.h
@@ -8,7 +8,7 @@
 
 namespace esphome::output {
 
-template<typename... Ts> class TurnOffAction : public Action<Ts...> {
+template<typename... Ts> class TurnOffAction final : public Action<Ts...> {
  public:
   TurnOffAction(BinaryOutput *output) : output_(output) {}
 
@@ -18,7 +18,7 @@ template<typename... Ts> class TurnOffAction : public Action<Ts...> {
   BinaryOutput *output_;
 };
 
-template<typename... Ts> class TurnOnAction : public Action<Ts...> {
+template<typename... Ts> class TurnOnAction final : public Action<Ts...> {
  public:
   TurnOnAction(BinaryOutput *output) : output_(output) {}
 
@@ -28,7 +28,7 @@ template<typename... Ts> class TurnOnAction : public Action<Ts...> {
   BinaryOutput *output_;
 };
 
-template<typename... Ts> class SetLevelAction : public Action<Ts...> {
+template<typename... Ts> class SetLevelAction final : public Action<Ts...> {
  public:
   SetLevelAction(FloatOutput *output) : output_(output) {}
 
@@ -41,7 +41,7 @@ template<typename... Ts> class SetLevelAction : public Action<Ts...> {
 };
 
 #ifdef USE_OUTPUT_FLOAT_POWER_SCALING
-template<typename... Ts> class SetMinPowerAction : public Action<Ts...> {
+template<typename... Ts> class SetMinPowerAction final : public Action<Ts...> {
  public:
   SetMinPowerAction(FloatOutput *output) : output_(output) {}
 
@@ -53,7 +53,7 @@ template<typename... Ts> class SetMinPowerAction : public Action<Ts...> {
   FloatOutput *output_;
 };
 
-template<typename... Ts> class SetMaxPowerAction : public Action<Ts...> {
+template<typename... Ts> class SetMaxPowerAction final : public Action<Ts...> {
  public:
   SetMaxPowerAction(FloatOutput *output) : output_(output) {}
 
diff --git a/esphome/components/output/button/output_button.h b/esphome/components/output/button/output_button.h
index 1a2997bdcf..bf6be8afe1 100644
--- a/esphome/components/output/button/output_button.h
+++ b/esphome/components/output/button/output_button.h
@@ -6,7 +6,7 @@
 
 namespace esphome::output {
 
-class OutputButton : public button::Button, public Component {
+class OutputButton final : public button::Button, public Component {
  public:
   void dump_config() override;
 
diff --git a/esphome/components/output/lock/output_lock.h b/esphome/components/output/lock/output_lock.h
index 7be96e1e82..8e5f4ff7df 100644
--- a/esphome/components/output/lock/output_lock.h
+++ b/esphome/components/output/lock/output_lock.h
@@ -6,7 +6,7 @@
 
 namespace esphome::output {
 
-class OutputLock : public lock::Lock, public Component {
+class OutputLock final : public lock::Lock, public Component {
  public:
   void set_output(BinaryOutput *output) { output_ = output; }
 
diff --git a/esphome/components/output/switch/output_switch.h b/esphome/components/output/switch/output_switch.h
index b0d85678be..878104f14c 100644
--- a/esphome/components/output/switch/output_switch.h
+++ b/esphome/components/output/switch/output_switch.h
@@ -6,7 +6,7 @@
 
 namespace esphome::output {
 
-class OutputSwitch : public switch_::Switch, public Component {
+class OutputSwitch final : public switch_::Switch, public Component {
  public:
   void set_output(BinaryOutput *output) { output_ = output; }
 
diff --git a/esphome/components/partition/light_partition.h b/esphome/components/partition/light_partition.h
index 7a2f3678c1..adadde068c 100644
--- a/esphome/components/partition/light_partition.h
+++ b/esphome/components/partition/light_partition.h
@@ -31,7 +31,7 @@ class AddressableSegment {
   bool reversed_;
 };
 
-class PartitionLightOutput : public light::AddressableLight {
+class PartitionLightOutput final : public light::AddressableLight {
  public:
   explicit PartitionLightOutput(std::vector<AddressableSegment> segments) : segments_(std::move(segments)) {
     int32_t off = 0;
diff --git a/esphome/components/pca6416a/pca6416a.h b/esphome/components/pca6416a/pca6416a.h
index 3170033b28..39011d53ab 100644
--- a/esphome/components/pca6416a/pca6416a.h
+++ b/esphome/components/pca6416a/pca6416a.h
@@ -7,9 +7,9 @@
 
 namespace esphome::pca6416a {
 
-class PCA6416AComponent : public Component,
-                          public i2c::I2CDevice,
-                          public gpio_expander::CachedGpioExpander<uint8_t, 16> {
+class PCA6416AComponent final : public Component,
+                                public i2c::I2CDevice,
+                                public gpio_expander::CachedGpioExpander<uint8_t, 16> {
  public:
   PCA6416AComponent() = default;
 
@@ -49,7 +49,7 @@ class PCA6416AComponent : public Component,
 };
 
 /// Helper class to expose a PCA6416A pin as an internal input GPIO pin.
-class PCA6416AGPIOPin : public GPIOPin {
+class PCA6416AGPIOPin final : public GPIOPin {
  public:
   void setup() override;
   void pin_mode(gpio::Flags flags) override;
diff --git a/esphome/components/pca9554/pca9554.h b/esphome/components/pca9554/pca9554.h
index 9fa398cf29..05e945d176 100644
--- a/esphome/components/pca9554/pca9554.h
+++ b/esphome/components/pca9554/pca9554.h
@@ -7,9 +7,9 @@
 
 namespace esphome::pca9554 {
 
-class PCA9554Component : public Component,
-                         public i2c::I2CDevice,
-                         public gpio_expander::CachedGpioExpander<uint16_t, 16> {
+class PCA9554Component final : public Component,
+                               public i2c::I2CDevice,
+                               public gpio_expander::CachedGpioExpander<uint16_t, 16> {
  public:
   PCA9554Component() = default;
 
@@ -53,7 +53,7 @@ class PCA9554Component : public Component,
 };
 
 /// Helper class to expose a PCA9554 pin as an internal input GPIO pin.
-class PCA9554GPIOPin : public GPIOPin {
+class PCA9554GPIOPin final : public GPIOPin {
  public:
   void setup() override;
   void pin_mode(gpio::Flags flags) override;
diff --git a/esphome/components/pca9685/pca9685_output.h b/esphome/components/pca9685/pca9685_output.h
index 33819f23ee..dad722888f 100644
--- a/esphome/components/pca9685/pca9685_output.h
+++ b/esphome/components/pca9685/pca9685_output.h
@@ -24,7 +24,7 @@ inline constexpr uint8_t PCA9685_MODE_OUTNE_LOW = 0x01;
 
 class PCA9685Output;
 
-class PCA9685Channel : public output::FloatOutput {
+class PCA9685Channel final : public output::FloatOutput {
  public:
   void set_channel(uint8_t channel) { channel_ = channel; }
   void set_parent(PCA9685Output *parent) { parent_ = parent; }
@@ -39,7 +39,7 @@ class PCA9685Channel : public output::FloatOutput {
 };
 
 /// PCA9685 float output component.
-class PCA9685Output : public Component, public i2c::I2CDevice {
+class PCA9685Output final : public Component, public i2c::I2CDevice {
  public:
   PCA9685Output(uint8_t mode = PCA9685_MODE_OUTPUT_ONACK | PCA9685_MODE_OUTPUT_TOTEM_POLE) : mode_(mode) {}
 
diff --git a/esphome/components/pcd8544/pcd_8544.h b/esphome/components/pcd8544/pcd_8544.h
index 9e4ee93035..3368c39551 100644
--- a/esphome/components/pcd8544/pcd_8544.h
+++ b/esphome/components/pcd8544/pcd_8544.h
@@ -6,9 +6,9 @@
 
 namespace esphome::pcd8544 {
 
-class PCD8544 : public display::DisplayBuffer,
-                public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_HIGH, spi::CLOCK_PHASE_TRAILING,
-                                      spi::DATA_RATE_8MHZ> {
+class PCD8544 final : public display::DisplayBuffer,
+                      public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_HIGH,
+                                            spi::CLOCK_PHASE_TRAILING, spi::DATA_RATE_8MHZ> {
  public:
   const uint8_t PCD8544_POWERDOWN = 0x04;
   const uint8_t PCD8544_ENTRYMODE = 0x02;
diff --git a/esphome/components/pcf85063/pcf85063.h b/esphome/components/pcf85063/pcf85063.h
index 1c6b6bf36d..659260ba5e 100644
--- a/esphome/components/pcf85063/pcf85063.h
+++ b/esphome/components/pcf85063/pcf85063.h
@@ -6,7 +6,7 @@
 
 namespace esphome::pcf85063 {
 
-class PCF85063Component : public time::RealTimeClock, public i2c::I2CDevice {
+class PCF85063Component final : public time::RealTimeClock, public i2c::I2CDevice {
  public:
   void setup() override;
   void update() override;
@@ -81,12 +81,12 @@ class PCF85063Component : public time::RealTimeClock, public i2c::I2CDevice {
   } pcf85063_;
 };
 
-template<typename... Ts> class WriteAction : public Action<Ts...>, public Parented<PCF85063Component> {
+template<typename... Ts> class WriteAction final : public Action<Ts...>, public Parented<PCF85063Component> {
  public:
   void play(const Ts &...x) override { this->parent_->write_time(); }
 };
 
-template<typename... Ts> class ReadAction : public Action<Ts...>, public Parented<PCF85063Component> {
+template<typename... Ts> class ReadAction final : public Action<Ts...>, public Parented<PCF85063Component> {
  public:
   void play(const Ts &...x) override { this->parent_->read_time(); }
 };
diff --git a/esphome/components/pcf8563/pcf8563.h b/esphome/components/pcf8563/pcf8563.h
index 72b600d9ba..e208774c2c 100644
--- a/esphome/components/pcf8563/pcf8563.h
+++ b/esphome/components/pcf8563/pcf8563.h
@@ -6,7 +6,7 @@
 
 namespace esphome::pcf8563 {
 
-class PCF8563Component : public time::RealTimeClock, public i2c::I2CDevice {
+class PCF8563Component final : public time::RealTimeClock, public i2c::I2CDevice {
  public:
   void setup() override;
   void update() override;
@@ -109,12 +109,12 @@ class PCF8563Component : public time::RealTimeClock, public i2c::I2CDevice {
   } pcf8563_;
 };
 
-template<typename... Ts> class WriteAction : public Action<Ts...>, public Parented<PCF8563Component> {
+template<typename... Ts> class WriteAction final : public Action<Ts...>, public Parented<PCF8563Component> {
  public:
   void play(const Ts &...x) override { this->parent_->write_time(); }
 };
 
-template<typename... Ts> class ReadAction : public Action<Ts...>, public Parented<PCF8563Component> {
+template<typename... Ts> class ReadAction final : public Action<Ts...>, public Parented<PCF8563Component> {
  public:
   void play(const Ts &...x) override { this->parent_->read_time(); }
 };
diff --git a/esphome/components/pcf8574/pcf8574.h b/esphome/components/pcf8574/pcf8574.h
index ece472c4bb..e8f78bae50 100644
--- a/esphome/components/pcf8574/pcf8574.h
+++ b/esphome/components/pcf8574/pcf8574.h
@@ -9,9 +9,9 @@ namespace esphome::pcf8574 {
 
 // PCF8574(8 pins)/PCF8575(16 pins) always read/write all pins in a single I2C transaction
 // so we use uint16_t as bank type to ensure all pins are in one bank and cached together
-class PCF8574Component : public Component,
-                         public i2c::I2CDevice,
-                         public gpio_expander::CachedGpioExpander<uint16_t, 16> {
+class PCF8574Component final : public Component,
+                               public i2c::I2CDevice,
+                               public gpio_expander::CachedGpioExpander<uint16_t, 16> {
  public:
   PCF8574Component() = default;
 
@@ -49,7 +49,7 @@ class PCF8574Component : public Component,
 };
 
 /// Helper class to expose a PCF8574 pin as an internal input GPIO pin.
-class PCF8574GPIOPin : public GPIOPin {
+class PCF8574GPIOPin final : public GPIOPin {
  public:
   void setup() override;
   void pin_mode(gpio::Flags flags) override;
diff --git a/esphome/components/pcm5122/pcm5122.h b/esphome/components/pcm5122/pcm5122.h
index f86b096c82..3c42e4d8d2 100644
--- a/esphome/components/pcm5122/pcm5122.h
+++ b/esphome/components/pcm5122/pcm5122.h
@@ -41,7 +41,7 @@ enum PCM5122BitsPerSample : uint8_t {
   PCM5122_BITS_PER_SAMPLE_32 = 32,
 };
 
-class PCM5122 : public audio_dac::AudioDac, public Component, public i2c::I2CDevice {
+class PCM5122 final : public audio_dac::AudioDac, public Component, public i2c::I2CDevice {
  public:
   void setup() override;
   void dump_config() override;
diff --git a/esphome/components/pcm5122/pcm5122_gpio.h b/esphome/components/pcm5122/pcm5122_gpio.h
index 8edaa6d3e8..0c750ab278 100644
--- a/esphome/components/pcm5122/pcm5122_gpio.h
+++ b/esphome/components/pcm5122/pcm5122_gpio.h
@@ -6,7 +6,7 @@
 
 namespace esphome::pcm5122 {
 
-class PCM5122GPIOPin : public GPIOPin, public Parented<PCM5122> {
+class PCM5122GPIOPin final : public GPIOPin, public Parented<PCM5122> {
  public:
   void setup() override;
   void pin_mode(gpio::Flags flags) override;
diff --git a/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h b/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h
index 6225956430..9909dc2217 100644
--- a/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h
+++ b/esphome/components/pi4ioe5v6408/pi4ioe5v6408.h
@@ -6,9 +6,9 @@
 #include "esphome/core/hal.h"
 
 namespace esphome::pi4ioe5v6408 {
-class PI4IOE5V6408Component : public Component,
-                              public i2c::I2CDevice,
-                              public gpio_expander::CachedGpioExpander<uint8_t, 8> {
+class PI4IOE5V6408Component final : public Component,
+                                    public i2c::I2CDevice,
+                                    public gpio_expander::CachedGpioExpander<uint8_t, 8> {
  public:
   PI4IOE5V6408Component() = default;
 
@@ -49,7 +49,7 @@ class PI4IOE5V6408Component : public Component,
   bool read_gpio_outputs_();
 };
 
-class PI4IOE5V6408GPIOPin : public GPIOPin, public Parented<PI4IOE5V6408Component> {
+class PI4IOE5V6408GPIOPin final : public GPIOPin, public Parented<PI4IOE5V6408Component> {
  public:
   void setup() override;
   void pin_mode(gpio::Flags flags) override;
diff --git a/esphome/components/pid/pid_climate.h b/esphome/components/pid/pid_climate.h
index 9e3c89ca4d..7269709ab9 100644
--- a/esphome/components/pid/pid_climate.h
+++ b/esphome/components/pid/pid_climate.h
@@ -11,7 +11,7 @@
 
 namespace esphome::pid {
 
-class PIDClimate : public climate::Climate, public Component {
+class PIDClimate final : public climate::Climate, public Component {
  public:
   PIDClimate() = default;
   void setup() override;
@@ -108,7 +108,7 @@ class PIDClimate : public climate::Climate, public Component {
   bool do_publish_ = false;
 };
 
-template<typename... Ts> class PIDAutotuneAction : public Action<Ts...> {
+template<typename... Ts> class PIDAutotuneAction final : public Action<Ts...> {
  public:
   PIDAutotuneAction(PIDClimate *parent) : parent_(parent) {}
 
@@ -131,7 +131,7 @@ template<typename... Ts> class PIDAutotuneAction : public Action<Ts...> {
   PIDClimate *parent_;
 };
 
-template<typename... Ts> class PIDResetIntegralTermAction : public Action<Ts...> {
+template<typename... Ts> class PIDResetIntegralTermAction final : public Action<Ts...> {
  public:
   PIDResetIntegralTermAction(PIDClimate *parent) : parent_(parent) {}
 
@@ -141,7 +141,7 @@ template<typename... Ts> class PIDResetIntegralTermAction : public Action<Ts...>
   PIDClimate *parent_;
 };
 
-template<typename... Ts> class PIDSetControlParametersAction : public Action<Ts...> {
+template<typename... Ts> class PIDSetControlParametersAction final : public Action<Ts...> {
  public:
   PIDSetControlParametersAction(PIDClimate *parent) : parent_(parent) {}
 
diff --git a/esphome/components/pid/sensor/pid_climate_sensor.h b/esphome/components/pid/sensor/pid_climate_sensor.h
index d6bdc66a46..b62d597780 100644
--- a/esphome/components/pid/sensor/pid_climate_sensor.h
+++ b/esphome/components/pid/sensor/pid_climate_sensor.h
@@ -18,7 +18,7 @@ enum PIDClimateSensorType {
   PID_SENSOR_TYPE_KD,
 };
 
-class PIDClimateSensor : public sensor::Sensor, public Component {
+class PIDClimateSensor final : public sensor::Sensor, public Component {
  public:
   void setup() override;
   void set_parent(PIDClimate *parent) { parent_ = parent; }
diff --git a/esphome/components/pipsolar/output/pipsolar_output.h b/esphome/components/pipsolar/output/pipsolar_output.h
index 4a6e4c29d7..6fc013c276 100644
--- a/esphome/components/pipsolar/output/pipsolar_output.h
+++ b/esphome/components/pipsolar/output/pipsolar_output.h
@@ -10,7 +10,7 @@ namespace esphome::pipsolar {
 
 class Pipsolar;
 
-class PipsolarOutput : public output::FloatOutput {
+class PipsolarOutput final : public output::FloatOutput {
  public:
   PipsolarOutput() {}
   void set_parent(Pipsolar *parent) { this->parent_ = parent; }
@@ -27,7 +27,7 @@ class PipsolarOutput : public output::FloatOutput {
   std::vector<float> possible_values_;
 };
 
-template<typename... Ts> class SetOutputAction : public Action<Ts...> {
+template<typename... Ts> class SetOutputAction final : public Action<Ts...> {
  public:
   SetOutputAction(PipsolarOutput *output) : output_(output) {}
 
diff --git a/esphome/components/pipsolar/pipsolar.h b/esphome/components/pipsolar/pipsolar.h
index 59332080cf..06c920a6e4 100644
--- a/esphome/components/pipsolar/pipsolar.h
+++ b/esphome/components/pipsolar/pipsolar.h
@@ -56,7 +56,7 @@ struct QFLAGValues {
   PIPSOLAR_ENTITY_(binary_sensor::BinarySensor, name, polling_command)
 #define PIPSOLAR_TEXT_SENSOR(name, polling_command) PIPSOLAR_ENTITY_(text_sensor::TextSensor, name, polling_command)
 
-class Pipsolar : public uart::UARTDevice, public PollingComponent {
+class Pipsolar final : public uart::UARTDevice, public PollingComponent {
   // QPIGS values
   PIPSOLAR_SENSOR(grid_voltage, QPIGS)
   PIPSOLAR_SENSOR(grid_frequency, QPIGS)
diff --git a/esphome/components/pipsolar/switch/pipsolar_switch.h b/esphome/components/pipsolar/switch/pipsolar_switch.h
index 20d2640d90..2b8cda9d59 100644
--- a/esphome/components/pipsolar/switch/pipsolar_switch.h
+++ b/esphome/components/pipsolar/switch/pipsolar_switch.h
@@ -6,7 +6,7 @@
 
 namespace esphome::pipsolar {
 class Pipsolar;
-class PipsolarSwitch : public switch_::Switch, public Component {
+class PipsolarSwitch final : public switch_::Switch, public Component {
  public:
   void set_parent(Pipsolar *parent) { this->parent_ = parent; }
   void set_on_command(const char *command) { this->on_command_ = command; }
diff --git a/esphome/components/pm1006/pm1006.h b/esphome/components/pm1006/pm1006.h
index 38ab284f47..b32bb2ba8e 100644
--- a/esphome/components/pm1006/pm1006.h
+++ b/esphome/components/pm1006/pm1006.h
@@ -7,7 +7,7 @@
 
 namespace esphome::pm1006 {
 
-class PM1006Component : public PollingComponent, public uart::UARTDevice {
+class PM1006Component final : public PollingComponent, public uart::UARTDevice {
  public:
   PM1006Component() = default;
 
diff --git a/esphome/components/pm2005/pm2005.h b/esphome/components/pm2005/pm2005.h
index 9661d082d1..e4ab9ff328 100644
--- a/esphome/components/pm2005/pm2005.h
+++ b/esphome/components/pm2005/pm2005.h
@@ -11,7 +11,7 @@ enum SensorType {
   PM2105,
 };
 
-class PM2005Component : public PollingComponent, public i2c::I2CDevice {
+class PM2005Component final : public PollingComponent, public i2c::I2CDevice {
  public:
   void set_sensor_type(SensorType sensor_type) { this->sensor_type_ = sensor_type; }