RubyGems

google-protobuf

Protocol Buffers

About

marshallingprotobufprotobuf-runtimeprotocprotocol-buffersprotocol-compilerrpcserialization

github.com/protocolbuffers/protobuf developers.google.com/protocol-buffersBSD-3-ClauseProtobuf Authors72.1k · 16.3k forks · 1.5k contributors

I'm on version…

Compares against 4.36.2 (latest stable)

Latest Stable4.36.2Sep 18, 2026

Latest RC4.37.0.rc.1Oct 15, 2026

Latest Alpha3.0.0.alpha.5.0.5.1May 4, 2016

Release cadenceEvery 3 weeks

Last releaseOct 15, 2026

Open advisories0

Changelog quality0% curated

No release notes found

Release history SecurityYou're on

3.x4.x

STABLE · RCPRE-RELEASE 2024AprJulOct2025AprJulOct2026AprJulOct

139 older or filtered releases not shown.

Upgrade guides

Breaking changes and a migration checklist for each major version

google-protobuf 3 → 43.25.8 → 4.36.2Sep 18, 2026 Unknown1

VersionChannelDateChangesSecurity

4.37.0.rc.1 RCOct 15, 2026No changes listed 4.36.2 StableSep 18, 2026No notes published 4.36.1 StableAug 31, 2026No notes published 4.36.0 StableAug 20, 2026No notes published 4.36.0.rc.2 RCAug 4, 2026No notes published 4.36.0.rc.1 RCJul 9, 2026No notes published 4.35.1 youStableJun 11, 2026No notes published 4.35.0 StableMay 19, 2026No notes published 4.35.0.rc.2 RCMay 6, 2026No notes published 4.35.0.rc.1 RCApr 21, 2026No notes published 4.34.2 StableMay 20, 2026No notes published 4.34.1 StableMar 20, 2026No notes published 4.34.0 StableFeb 27, 2026No notes published 4.34.0.rc.2 RCFeb 6, 2026No notes published 4.34.0.rc.1 RCJan 22, 2026No notes published 4.33.6 StableMar 18, 2026No notes published 4.33.5 StableFeb 6, 2026No notes published 4.33.4 StableJan 12, 2026No notes published 4.33.3 StableJan 9, 2026No notes published 4.33.2 StableDec 6, 2025No notes published