valvesoftware/proton vs zeromq/libzmq
zeromq/libzmq shows stronger signals overall
As of June 2026, libzmq shows healthier maintenance signals than proton. libzmq rates Healthy overall while proton rates Mixed. proton last saw a commit 1 month ago with 12+ active contributors, while libzmq last saw a commit 2 months ago with 42+ active contributors. proton is Other-licensed while libzmq is MPL-2.0-licensed. Neither has known critical or high-severity CVEs in its dependency tree.
Informational only. RepoPilot summarises public signals at the time of analysis. Not professional, security, or legal advice.
valvesoftware/proton →
Mixed signals — read the receipts
non-standard license (Other); no tests detected…
Has a license, tests, and CI — clean foundation to fork and modify.
Documented and popular — useful reference codebase to read through.
No critical CVEs, sane security posture — runnable as-is.
- ⚠Non-standard license (Other) — review terms
- ⚠No CI workflows detected
- ⚠No test directory detected
- ✓Last commit today
- ✓12 active contributors
- ✓Distributed ownership (top contributor 36% of recent commits)
- ✓Other licensed
What would improve this?
- →Use as dependency Concerns → Mixed if: clarify license terms
Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests
zeromq/libzmq →
Healthy across the board
Permissive license, no critical CVEs, actively maintained — safe to depend on.
Has a license, tests, and CI — clean foundation to fork and modify.
Documented and popular — useful reference codebase to read through.
No critical CVEs, sane security posture — runnable as-is.
- ✓Last commit 5w ago
- ✓42+ active contributors
- ✓Distributed ownership (top contributor 24% of recent commits)
- ✓MPL-2.0 licensed
- ✓CI configured
- ✓Tests present
Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests
Signal-by-signal breakdown
| proton | libzmq | |
|---|---|---|
| Stars | 31,365 | 10,869 |
| Last commit | 1mo ago | 2mo ago |
| License | Other | MPL-2.0 |
| Open issues | 5,073 | 383 |
| Has tests | — | ✓ |
| Has CI | — | ✓ |
| Test coverage | 0% | 8% |
| Dependency CVEs | No CVEs | No CVEs |
| Architecture grade | — | — |
| Cycles | — | — |
| Bottom-line | Mixed signals | Healthy signals |
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