head to head · open source
SigNoz vs Logfire
SigNoz has 32,146 GitHub stars, 2,497 forks, 1,557 open issues and last shipped today. Logfire has 4,480 stars, 289 forks, 191 open issues and last shipped today. SigNoz leads on adoption by 618% (32,146 vs 4,480 stars). SigNoz is written in TypeScript under a custom or non-standard licence; Logfire is written in Python under MIT. SigNoz has attracted 8% as many forks as stars, Logfire 6%. SigNoz was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (metrics, observability), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| SigNoz | Logfire | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 4.5K |
| License | Custom / other | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 2.5K | ⑂ 289 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SigNoz if
- You weight community size — 32K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Logfire if
- You want the Logfire feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and Logfire fits your workflow better
About SigNoz
SigNoz is an open source, OpenTelemetry native observability platform for cloud native applications. It unifies logs, metrics, traces, alerts, and dashboards into a single tool, replacing fragmented monitoring stacks with a correlated signal pipeline. It lives in the observability ecosystem alongside tools like Prometheus, Jaeger, and Grafana, and is positioned as an open alternative to Datadog.
read the full SigNoz overview →
About Logfire
Pydantic Logfire is an observability platform for Python applications, with a focus on AI systems, LLM apps, and agents. The project lives in the Python and OpenTelemetry ecosystem. The repository contains the MIT licensed Python SDK and documentation, while the server application for recording and displaying data is closed source.
read the full Logfire overview →
More in Infrastructure & Operations
Related comparisons
More Monitoring & Observability projects
Compare either of these against the rest of the Monitoring & Observability field.
Frequently asked questions
Is SigNoz or Logfire more popular?
SigNoz has 32,146 GitHub stars and Logfire has 4,480. SigNoz has the larger community by that measure.
Are SigNoz and Logfire free?
Both are open source. SigNoz has no licence declared in this registry, and Logfire is licensed under MIT. Both are free to self-host.
What is the difference between SigNoz and Logfire?
SigNoz is written in TypeScript and Logfire in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, SigNoz or Logfire?
Choose SigNoz if you want the larger community (32,146 stars) or its Custom / other licence terms. Choose Logfire if its feature set, stack or MIT licence fits better. Both are self-hostable.