head to head · open source
Langfuse vs dagster
Langfuse has 36,898 GitHub stars, 4,146 forks, 926 open issues and last shipped yesterday. dagster has 16,364 stars, 2,395 forks, 2,589 open issues and last shipped 4 days ago. Langfuse leads on adoption by 125% (36,898 vs 16,364 stars). Langfuse is written in TypeScript under a custom or non-standard licence; dagster is written in Python under Apache-2.0. Langfuse has attracted 11% as many forks as stars, dagster 15%. Langfuse was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (analytics), 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
| Langfuse | dagster | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 16K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 4.1K | ⑂ 2.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Langfuse if
- You weight community size — 37K 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 dagster if
- You want the dagster feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Python
- You evaluated both and dagster fits your workflow better
About Langfuse
Langfuse Cloud · Self Host · Demo Docs · Report Bug · Feature Request · Changelog · Roadmap · Langfuse is an open source LLM engineering platform. It helps teams collaboratively develop, monitor, evaluate, and debug AI applications. Langfuse can be self hosted in minutes and is battle tested . Proudly made with ClickHouse open source database. 🧑💻 We're hiring Langfuse is growing fast (we doubled the team in the last 6 months) since January 2026 we're part of ClickHouse, we're hiring engineering hybrid across the EU. We hire engineers who love open source and great developer experiences. See open roles → ✨…
read the full Langfuse overview →
About dagster
Dagster is a cloud native data pipeline orchestrator for the whole development lifecycle, with integrated lineage and observability, a declarative programming model, and best in class testability. It is designed for developing and maintaining data assets , such as tables, data sets, machine learning models, and reports. With Dagster, you declare—as Python functions—the data assets that you want to build. Dagster then helps you run your functions at the right time and keep your assets up to date. Here is an example of a graph of three assets defined in Python: The graph loaded into Dagster's web UI: Dagster is…
read the full dagster overview →
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Frequently asked questions
Is Langfuse or dagster more popular?
Langfuse has 36,898 GitHub stars and dagster has 16,364. Langfuse has the larger community by that measure.
Are Langfuse and dagster free?
Both are open source. Langfuse has no licence declared in this registry, and dagster is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Langfuse and dagster?
Langfuse is written in TypeScript and dagster 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, Langfuse or dagster?
Choose Langfuse if you want the larger community (36,898 stars) or its Custom / other licence terms. Choose dagster if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.