diff --git a/esphome/components/ota/ota_backend_arduino_esp32.cpp b/esphome/components/ota/ota_backend_arduino_esp32.cpp
index 008cd45df4..5c6230f2ce 100644
--- a/esphome/components/ota/ota_backend_arduino_esp32.cpp
+++ b/esphome/components/ota/ota_backend_arduino_esp32.cpp
@@ -12,7 +12,7 @@ namespace ota {
 
 static const char *const TAG = "ota.arduino_esp32";
 
-std::unique_ptr<OTABackend> make_ota_backend() { return make_unique<ArduinoESP32OTABackend>(); }
+std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::ArduinoESP32OTABackend>(); }
 
 OTAResponseTypes ArduinoESP32OTABackend::begin(size_t image_size) {
   // Handle UPDATE_SIZE_UNKNOWN (0) which is used by web server OTA
diff --git a/esphome/components/ota/ota_backend_arduino_esp8266.cpp b/esphome/components/ota/ota_backend_arduino_esp8266.cpp
index 3ad429b48c..375c4e7200 100644
--- a/esphome/components/ota/ota_backend_arduino_esp8266.cpp
+++ b/esphome/components/ota/ota_backend_arduino_esp8266.cpp
@@ -14,7 +14,7 @@ namespace ota {
 
 static const char *const TAG = "ota.arduino_esp8266";
 
-std::unique_ptr<OTABackend> make_ota_backend() { return make_unique<ArduinoESP8266OTABackend>(); }
+std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::ArduinoESP8266OTABackend>(); }
 
 OTAResponseTypes ArduinoESP8266OTABackend::begin(size_t image_size) {
   // Handle UPDATE_SIZE_UNKNOWN (0) by calculating available space
diff --git a/esphome/components/ota/ota_backend_arduino_libretiny.cpp b/esphome/components/ota/ota_backend_arduino_libretiny.cpp
index 8ef0f0005d..b4ecad1227 100644
--- a/esphome/components/ota/ota_backend_arduino_libretiny.cpp
+++ b/esphome/components/ota/ota_backend_arduino_libretiny.cpp
@@ -12,7 +12,7 @@ namespace ota {
 
 static const char *const TAG = "ota.arduino_libretiny";
 
-std::unique_ptr<OTABackend> make_ota_backend() { return make_unique<ArduinoLibreTinyOTABackend>(); }
+std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::ArduinoLibreTinyOTABackend>(); }
 
 OTAResponseTypes ArduinoLibreTinyOTABackend::begin(size_t image_size) {
   // Handle UPDATE_SIZE_UNKNOWN (0) which is used by web server OTA
diff --git a/esphome/components/ota/ota_backend_arduino_rp2040.cpp b/esphome/components/ota/ota_backend_arduino_rp2040.cpp
index 2ed000f3e0..4aa98f78ba 100644
--- a/esphome/components/ota/ota_backend_arduino_rp2040.cpp
+++ b/esphome/components/ota/ota_backend_arduino_rp2040.cpp
@@ -14,7 +14,7 @@ namespace ota {
 
 static const char *const TAG = "ota.arduino_rp2040";
 
-std::unique_ptr<OTABackend> make_ota_backend() { return make_unique<ArduinoRP2040OTABackend>(); }
+std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::ArduinoRP2040OTABackend>(); }
 
 OTAResponseTypes ArduinoRP2040OTABackend::begin(size_t image_size) {
   // Handle UPDATE_SIZE_UNKNOWN (0) by calculating available space
@@ -26,7 +26,6 @@ OTAResponseTypes ArduinoRP2040OTABackend::begin(size_t image_size) {
     size_t fs_size = &_FS_end - &_FS_start;
     // Reserve some space for filesystem overhead
     image_size = (fs_size - 0x1000) & 0xFFFFF000;
-    ESP_LOGD(TAG, "OTA size unknown, using filesystem size: %u bytes", image_size);
   }
   bool ret = Update.begin(image_size, U_FLASH);
   if (ret) {
diff --git a/esphome/components/ota/ota_backend_esp_idf.cpp b/esphome/components/ota/ota_backend_esp_idf.cpp
index 7638ef1752..97aae09bd9 100644
--- a/esphome/components/ota/ota_backend_esp_idf.cpp
+++ b/esphome/components/ota/ota_backend_esp_idf.cpp
@@ -11,7 +11,7 @@
 namespace esphome {
 namespace ota {
 
-std::unique_ptr<OTABackend> make_ota_backend() { return make_unique<IDFOTABackend>(); }
+std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::IDFOTABackend>(); }
 
 OTAResponseTypes IDFOTABackend::begin(size_t image_size) {
   this->partition_ = esp_ota_get_next_update_partition(nullptr);