diff --git a/esphome/components/api/api_pb2.cpp b/esphome/components/api/api_pb2.cpp
index 8bce14c9cc..7d16e43ce6 100644
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
@@ -3494,7 +3494,7 @@ bool SubscribeLogsResponse::decode_length(uint32_t field_id, ProtoLengthDelimite
 }
 void SubscribeLogsResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_enum<enums::LogLevel>(1, this->level);
-  buffer.encode_string(3, this->message);
+  buffer.encode_bytes(3, reinterpret_cast<const uint8_t *>(this->message.data()), this->message.size());
   buffer.encode_bool(4, this->send_failed);
 }
 void SubscribeLogsResponse::calculate_size(uint32_t &total_size) const {
@@ -3530,7 +3530,9 @@ bool NoiseEncryptionSetKeyRequest::decode_length(uint32_t field_id, ProtoLengthD
       return false;
   }
 }
-void NoiseEncryptionSetKeyRequest::encode(ProtoWriteBuffer buffer) const { buffer.encode_string(1, this->key); }
+void NoiseEncryptionSetKeyRequest::encode(ProtoWriteBuffer buffer) const {
+  buffer.encode_bytes(1, reinterpret_cast<const uint8_t *>(this->key.data()), this->key.size());
+}
 void NoiseEncryptionSetKeyRequest::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->key, false);
 }
@@ -4267,7 +4269,7 @@ bool CameraImageResponse::decode_32bit(uint32_t field_id, Proto32Bit value) {
 }
 void CameraImageResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_fixed32(1, this->key);
-  buffer.encode_string(2, this->data);
+  buffer.encode_bytes(2, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
   buffer.encode_bool(3, this->done);
 }
 void CameraImageResponse::calculate_size(uint32_t &total_size) const {
@@ -6785,7 +6787,7 @@ void BluetoothServiceData::encode(ProtoWriteBuffer buffer) const {
   for (auto &it : this->legacy_data) {
     buffer.encode_uint32(2, it, true);
   }
-  buffer.encode_string(3, this->data);
+  buffer.encode_bytes(3, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
 }
 void BluetoothServiceData::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_string_field(total_size, 1, this->uuid, false);
@@ -6859,7 +6861,7 @@ bool BluetoothLEAdvertisementResponse::decode_length(uint32_t field_id, ProtoLen
 }
 void BluetoothLEAdvertisementResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
-  buffer.encode_string(2, this->name);
+  buffer.encode_bytes(2, reinterpret_cast<const uint8_t *>(this->name.data()), this->name.size());
   buffer.encode_sint32(3, this->rssi);
   for (auto &it : this->service_uuids) {
     buffer.encode_string(4, it, true);
@@ -6960,7 +6962,7 @@ void BluetoothLERawAdvertisement::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
   buffer.encode_sint32(2, this->rssi);
   buffer.encode_uint32(3, this->address_type);
-  buffer.encode_string(4, this->data);
+  buffer.encode_bytes(4, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
 }
 void BluetoothLERawAdvertisement::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint64_field(total_size, 1, this->address, false);
@@ -7493,7 +7495,7 @@ bool BluetoothGATTReadResponse::decode_length(uint32_t field_id, ProtoLengthDeli
 void BluetoothGATTReadResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
   buffer.encode_uint32(2, this->handle);
-  buffer.encode_string(3, this->data);
+  buffer.encode_bytes(3, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
 }
 void BluetoothGATTReadResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint64_field(total_size, 1, this->address, false);
@@ -7552,7 +7554,7 @@ void BluetoothGATTWriteRequest::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
   buffer.encode_uint32(2, this->handle);
   buffer.encode_bool(3, this->response);
-  buffer.encode_string(4, this->data);
+  buffer.encode_bytes(4, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
 }
 void BluetoothGATTWriteRequest::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint64_field(total_size, 1, this->address, false);
@@ -7649,7 +7651,7 @@ bool BluetoothGATTWriteDescriptorRequest::decode_length(uint32_t field_id, Proto
 void BluetoothGATTWriteDescriptorRequest::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
   buffer.encode_uint32(2, this->handle);
-  buffer.encode_string(3, this->data);
+  buffer.encode_bytes(3, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
 }
 void BluetoothGATTWriteDescriptorRequest::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint64_field(total_size, 1, this->address, false);
@@ -7751,7 +7753,7 @@ bool BluetoothGATTNotifyDataResponse::decode_length(uint32_t field_id, ProtoLeng
 void BluetoothGATTNotifyDataResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_uint64(1, this->address);
   buffer.encode_uint32(2, this->handle);
-  buffer.encode_string(3, this->data);
+  buffer.encode_bytes(3, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
 }
 void BluetoothGATTNotifyDataResponse::calculate_size(uint32_t &total_size) const {
   ProtoSize::add_uint64_field(total_size, 1, this->address, false);
@@ -8481,7 +8483,7 @@ bool VoiceAssistantAudio::decode_length(uint32_t field_id, ProtoLengthDelimited
   }
 }
 void VoiceAssistantAudio::encode(ProtoWriteBuffer buffer) const {
-  buffer.encode_string(1, this->data);
+  buffer.encode_bytes(1, reinterpret_cast<const uint8_t *>(this->data.data()), this->data.size());
   buffer.encode_bool(2, this->end);
 }
 void VoiceAssistantAudio::calculate_size(uint32_t &total_size) const {
diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index 615f5bbfda..56a46a7701 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -526,9 +526,13 @@ class BytesType(TypeInfo):
     reference_type = "std::string &"
     const_reference_type = "const std::string &"
     decode_length = "value.as_string()"
-    encode_func = "encode_string"
+    encode_func = "encode_bytes"
     wire_type = WireType.LENGTH_DELIMITED  # Uses wire type 2
 
+    @property
+    def encode_content(self) -> str:
+        return f"buffer.encode_bytes({self.number}, reinterpret_cast<const uint8_t*>(this->{self.field_name}.data()), this->{self.field_name}.size());"
+
     def dump(self, name: str) -> str:
         o = f"out.append(format_hex_pretty({name}));"
         return o