foxcpp/maddy vs uber-go/zap
uber-go/zap shows stronger signals overall
As of June 2026, zap shows healthier maintenance signals than maddy. zap rates Healthy overall while maddy rates Mixed. maddy last saw a commit 1 month ago with 17+ active contributors, while zap last saw a commit 2 months ago with 33+ active contributors. maddy is GPL-3.0-licensed while zap is MIT-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.
foxcpp/maddy →
Mixed signals — read the receipts
copyleft license (GPL-3.0) — review compatibility
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.
- ⚠Concentrated ownership — top contributor handles 75% of recent commits
- ⚠GPL-3.0 is copyleft — check downstream compatibility
- ✓Last commit 1w ago
- ✓17 active contributors
- ✓GPL-3.0 licensed
- ✓CI configured
- ✓Tests present
What would improve this?
- →Use as dependency Concerns → Mixed if: relicense under MIT/Apache-2.0 (rare for established libs)
Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests
uber-go/zap →
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 2w ago
- ✓33+ active contributors
- ✓Distributed ownership (top contributor 26% of recent commits)
- ✓MIT licensed
- ✓CI configured
- ✓Tests present
Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests
Signal-by-signal breakdown
| maddy | zap | |
|---|---|---|
| Stars | 5,953 | 24,454 |
| Last commit | 1mo ago | 2mo ago |
| License | GPL-3.0 | MIT |
| Open issues | 128 | 178 |
| Has tests | ✓ | ✓ |
| Has CI | ✓ | ✓ |
| Test coverage | 18% | 6% |
| Dependency CVEs | No CVEs | No CVEs |
| Architecture grade | — | — |
| Cycles | — | — |
| Bottom-line | Mixed signals | Healthy signals |
Want the full analysis? foxcpp/maddy · uber-go/zap
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