diff --git a/src/bitdrift_public/protobuf/client/v1/api.proto b/src/bitdrift_public/protobuf/client/v1/api.proto
index 84a904e..24b6127 100644
--- a/src/bitdrift_public/protobuf/client/v1/api.proto
+++ b/src/bitdrift_public/protobuf/client/v1/api.proto
@@ -147,8 +147,12 @@ message LogUploadRequest {
   string upload_uuid = 1 [(validate.rules).string = {min_len: 1}];
 
   // A repeated set of flatbuffer encoding of a number of log lines. Each log line is of type
-  // Log defined in buffer_log.fbs.
-  repeated bytes logs = 2 [(validate.rules).repeated = {min_items: 1}];
+  // Log defined in buffer_log.fbs. This is deprecated. New clients send protobuf encoded logs
+  // in the 'logs' field.
+  repeated bytes legacy_flatbuffer_logs = 2;
+
+  // Logs encoded in bitdrift_public.protobuf.logging.v1.Log format.
+  repeated bytes proto_logs = 5;
 
   // The UUID (v4) of the buffer that is producing the logs.
   string buffer_uuid = 3 [(validate.rules).string = {min_len: 1}];
diff --git a/src/bitdrift_public/protobuf/logging/v1/payload.proto b/src/bitdrift_public/protobuf/logging/v1/payload.proto
index e6442ce..e13575c 100644
--- a/src/bitdrift_public/protobuf/logging/v1/payload.proto
+++ b/src/bitdrift_public/protobuf/logging/v1/payload.proto
@@ -22,3 +22,51 @@ message Data {
     BinaryData binary_data = 2;
   }
 };
+
+enum LogType {
+  // Normal logs, from application code.
+  NORMAL = 0;
+  // Session replay logs.
+  REPLAY = 1;
+  // Application lifecycle logs.
+  LIFECYCLE = 2;
+  // Resource monitoring logs, such as memory, CPU, and battery consumption.
+  RESOURCE = 3;
+  // Internal SDK logs.
+  INTERNAL_SDK = 4;
+  // View lifecycle.
+  VIEW = 5;
+  // Device state.
+  DEVICE = 6;
+  // UX interaction.
+  UX = 7;
+  // Span start/end pairs.
+  SPAN = 8;
+}
+
+message Log {
+  message Field {
+    string key = 1;
+    Data value = 2;
+  }
+
+  // The timestamp in unix microseconds indicating when this log was recorded.
+  // NOTE: This was intentionally chosen to be the first field for trivial extraction without
+  //       parsing the full message.
+  uint64 timestamp_unix_micro = 1;
+  // The log level.
+  uint32 log_level = 2;
+  // The message associated with the log.
+  Data message = 3;
+  // An optional list of high cardinality fields.
+  repeated Field fields = 4;
+  // The ID of the session associated with this log.
+  string session_id = 5;
+  // The list of action IDs that were triggered by this log line.
+  repeated string action_ids = 6;
+  // The type of log.
+  LogType log_type = 7;
+  // The list of stream IDs that were associated with this streaming log.
+  // This should only be set when the log has been streamed.
+  repeated string stream_ids = 8;
+}