diff --git a/esphome/components/ota/ota_backend.h b/esphome/components/ota/ota_backend.h
index 68e8416025..bc603a6e9e 100644
--- a/esphome/components/ota/ota_backend.h
+++ b/esphome/components/ota/ota_backend.h
@@ -49,17 +49,6 @@ enum OTAState {
   OTA_ERROR,
 };
 
-class OTABackend {
- public:
-  virtual ~OTABackend() = default;
-  virtual OTAResponseTypes begin(size_t image_size) = 0;
-  virtual void set_update_md5(const char *md5) = 0;
-  virtual OTAResponseTypes write(uint8_t *data, size_t len) = 0;
-  virtual OTAResponseTypes end() = 0;
-  virtual void abort() = 0;
-  virtual bool supports_compression() = 0;
-};
-
 /** Listener interface for OTA state changes.
  *
  * Components can implement this interface to receive OTA state updates
diff --git a/esphome/components/ota/ota_backend_arduino_libretiny.h b/esphome/components/ota/ota_backend_arduino_libretiny.h
index 6028345534..4514bf84bd 100644
--- a/esphome/components/ota/ota_backend_arduino_libretiny.h
+++ b/esphome/components/ota/ota_backend_arduino_libretiny.h
@@ -7,14 +7,14 @@
 namespace esphome {
 namespace ota {
 
-class ArduinoLibreTinyOTABackend final : public OTABackend {
+class ArduinoLibreTinyOTABackend final {
  public:
-  OTAResponseTypes begin(size_t image_size) override;
-  void set_update_md5(const char *md5) override;
-  OTAResponseTypes write(uint8_t *data, size_t len) override;
-  OTAResponseTypes end() override;
-  void abort() override;
-  bool supports_compression() override { return false; }
+  OTAResponseTypes begin(size_t image_size);
+  void set_update_md5(const char *md5);
+  OTAResponseTypes write(uint8_t *data, size_t len);
+  OTAResponseTypes end();
+  void abort();
+  bool supports_compression() { return false; }
 
  private:
   bool md5_set_{false};
diff --git a/esphome/components/ota/ota_backend_arduino_rp2040.h b/esphome/components/ota/ota_backend_arduino_rp2040.h
index 897afcac5b..0956cb4b4b 100644
--- a/esphome/components/ota/ota_backend_arduino_rp2040.h
+++ b/esphome/components/ota/ota_backend_arduino_rp2040.h
@@ -9,14 +9,14 @@
 namespace esphome {
 namespace ota {
 
-class ArduinoRP2040OTABackend final : public OTABackend {
+class ArduinoRP2040OTABackend final {
  public:
-  OTAResponseTypes begin(size_t image_size) override;
-  void set_update_md5(const char *md5) override;
-  OTAResponseTypes write(uint8_t *data, size_t len) override;
-  OTAResponseTypes end() override;
-  void abort() override;
-  bool supports_compression() override { return false; }
+  OTAResponseTypes begin(size_t image_size);
+  void set_update_md5(const char *md5);
+  OTAResponseTypes write(uint8_t *data, size_t len);
+  OTAResponseTypes end();
+  void abort();
+  bool supports_compression() { return false; }
 
  private:
   bool md5_set_{false};
diff --git a/esphome/components/ota/ota_backend_esp8266.h b/esphome/components/ota/ota_backend_esp8266.h
index cc6a8e0667..6213289acc 100644
--- a/esphome/components/ota/ota_backend_esp8266.h
+++ b/esphome/components/ota/ota_backend_esp8266.h
@@ -12,15 +12,15 @@ namespace esphome::ota {
 /// OTA backend for ESP8266 using native SDK functions.
 /// This implementation bypasses the Arduino Updater library to save ~228 bytes of RAM
 /// by not having a global Update object in .bss.
-class ESP8266OTABackend final : public OTABackend {
+class ESP8266OTABackend final {
  public:
-  OTAResponseTypes begin(size_t image_size) override;
-  void set_update_md5(const char *md5) override;
-  OTAResponseTypes write(uint8_t *data, size_t len) override;
-  OTAResponseTypes end() override;
-  void abort() override;
+  OTAResponseTypes begin(size_t image_size);
+  void set_update_md5(const char *md5);
+  OTAResponseTypes write(uint8_t *data, size_t len);
+  OTAResponseTypes end();
+  void abort();
   // Compression supported in all ESP8266 Arduino versions ESPHome supports (>= 2.7.0)
-  bool supports_compression() override { return true; }
+  bool supports_compression() { return true; }
 
  protected:
   /// Erase flash sector if current address is at sector boundary
diff --git a/esphome/components/ota/ota_backend_esp_idf.h b/esphome/components/ota/ota_backend_esp_idf.h
index 7ca2d797de..a0f538afc0 100644
--- a/esphome/components/ota/ota_backend_esp_idf.h
+++ b/esphome/components/ota/ota_backend_esp_idf.h
@@ -10,14 +10,14 @@
 namespace esphome {
 namespace ota {
 
-class IDFOTABackend final : public OTABackend {
+class IDFOTABackend final {
  public:
-  OTAResponseTypes begin(size_t image_size) override;
-  void set_update_md5(const char *md5) override;
-  OTAResponseTypes write(uint8_t *data, size_t len) override;
-  OTAResponseTypes end() override;
-  void abort() override;
-  bool supports_compression() override { return false; }
+  OTAResponseTypes begin(size_t image_size);
+  void set_update_md5(const char *md5);
+  OTAResponseTypes write(uint8_t *data, size_t len);
+  OTAResponseTypes end();
+  void abort();
+  bool supports_compression() { return false; }
 
  private:
   esp_ota_handle_t update_handle_{0};
diff --git a/esphome/components/ota/ota_backend_factory.h b/esphome/components/ota/ota_backend_factory.h
index 8d417977d2..b6456e64fc 100644
--- a/esphome/components/ota/ota_backend_factory.h
+++ b/esphome/components/ota/ota_backend_factory.h
@@ -13,3 +13,5 @@
 #elif defined(USE_HOST)
 #include "ota_backend_host.h"
 #endif
+
+namespace esphome::ota {}  // namespace esphome::ota
diff --git a/esphome/components/ota/ota_backend_host.h b/esphome/components/ota/ota_backend_host.h
index 0d190cd3c8..300facf72f 100644
--- a/esphome/components/ota/ota_backend_host.h
+++ b/esphome/components/ota/ota_backend_host.h
@@ -7,14 +7,14 @@ namespace esphome::ota {
 /// Stub OTA backend for host platform - allows compilation but does not implement OTA.
 /// All operations return error codes immediately. This enables configurations with
 /// OTA triggers to compile for host platform during development.
-class HostOTABackend final : public OTABackend {
+class HostOTABackend final {
  public:
-  OTAResponseTypes begin(size_t image_size) override;
-  void set_update_md5(const char *md5) override;
-  OTAResponseTypes write(uint8_t *data, size_t len) override;
-  OTAResponseTypes end() override;
-  void abort() override;
-  bool supports_compression() override { return false; }
+  OTAResponseTypes begin(size_t image_size);
+  void set_update_md5(const char *md5);
+  OTAResponseTypes write(uint8_t *data, size_t len);
+  OTAResponseTypes end();
+  void abort();
+  bool supports_compression() { return false; }
 };
 
 std::unique_ptr<HostOTABackend> make_ota_backend();