head to head · open source
jaeger vs Logfire
jaeger has 23,223 GitHub stars, 3,122 forks, 547 open issues and last shipped 2 days ago. Logfire has 4,480 stars, 289 forks, 191 open issues and last shipped today. jaeger leads on adoption by 418% (23,223 vs 4,480 stars). jaeger is written in Go under Apache-2.0; Logfire is written in Python under MIT. jaeger has attracted 13% as many forks as stars, Logfire 6%. Logfire was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (observability, opentelemetry), 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.
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Side by side
| jaeger | Logfire | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 4.5K |
| License | Apache-2.0 | MIT |
| Written in | Go | Python |
| Last push | 2026-09-18 | 2026-09-20 |
| Forks | ⑂ 3.1K | ⑂ 289 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick jaeger if
- You weight community size — 23K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- 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 jaeger
Jaeger is a distributed tracing platform hosted by the Cloud Native Computing Foundation (CNCF), where it graduated as the 7th top level project in October 2019. It was originally created by Uber Technologies and then donated to the CNCF. The project is written in Go and released under the Apache 2.0 license, and it lives in the OpenTelemetry and observability ecosystem: it consumes traces from OpenTelemetry SDKs and reuses components from the OpenTelemetry Collector. Its repository carries topics including cncf, distributed tracing, jaeger, observability, opentelemetry and tracing, and the project is openly gove…
read the full jaeger 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 →
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Frequently asked questions
Is jaeger or Logfire more popular?
jaeger has 23,223 GitHub stars and Logfire has 4,480. jaeger has the larger community by that measure.
Are jaeger and Logfire free?
Both are open source. jaeger is licensed under Apache-2.0 and Logfire under MIT. Neither carries a licence fee.
What is the difference between jaeger and Logfire?
jaeger is written in Go 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, jaeger or Logfire?
Choose jaeger if you want the larger community (23,223 stars) or its Apache-2.0 licence terms. Choose Logfire if its feature set, stack or MIT licence fits better. Both are self-hostable.