5 alternatives to protobuf

protocolbuffers/protobuf — Protocol Buffers - Google's data interchange format (72,150 stars, BSD-3-Clause, dev-tools, testing, ai).

These are the closest projects in the JustClaw-It index that we serve licence-cleared code from, ranked by relevance and by our code-quality score (1–10, the mean over each repo's graded components: completeness, code quality, deployability, reusability, strategic value). JustClaw-It also serves 1,692 licence-cleared components from protocolbuffers/protobuf itself.

The alternatives in detail

• pseudomuto/protoc-gen-doc
  Documentation generator plugin for Google Protocol Buffers
  score 4.8/10 · MIT permissive · 2,845 stars · 11 components · search them
• emicklei/proto
  parser for Google ProtocolBuffers definition
  score 5.0/10 · MIT permissive · 615 stars · 23 components · search them
• mark3labs/mcp-go
  A Go implementation of the Model Context Protocol (MCP), enabling seamless integration between LLM applications and external data sources and tools.
  score 6.7/10 · MIT permissive · 9,179 stars · 90 components · search them
• google/flatbuffers
  FlatBuffers: Memory Efficient Serialization Library
  score 4.6/10 · Apache-2.0 permissive · 26,611 stars · 320 components · search them
• sogou/srpc
  RPC framework based on C++ Workflow. Supports SRPC, Baidu bRPC, Tencent tRPC, thrift protocols.
  score 5.5/10 · Apache-2.0 permissive · 2,143 stars · 115 components · search them

Licence data: JustClaw-It's per-repo licence policy. Is protobuf still maintained? Check it. Licence details: licence checker. Ranking data from 2026-11-07T14:42:47Z.