This is not to say it has more languages supported than Protobuf as I do not know exactly how many generators out there supporting Protobuf.
(OpenAPI Generator also comes with the generator/converter that converts OpenAPI spec documents into gRPC and protocol buffer schema files. Not sure if OpenAPI Generator is also counted as a generator for Protobuf)
This is not to say it has more languages supported than Protobuf as I do not know exactly how many generators out there supporting Protobuf.
(OpenAPI Generator also comes with the generator/converter that converts OpenAPI spec documents into gRPC and protocol buffer schema files. Not sure if OpenAPI Generator is also counted as a generator for Protobuf)