head to head · open source
cognee vs LangWatch
cognee has 30,848 GitHub stars, 3,066 forks, 495 open issues and last shipped 2 days ago. LangWatch has 4,833 stars, 395 forks, 939 open issues and last shipped 2 days ago. cognee leads on adoption by 538% (30,848 vs 4,833 stars). cognee is written in Python under Apache-2.0; LangWatch is written in TypeScript under Apache-2.0. cognee has attracted 10% as many forks as stars, LangWatch 8%. LangWatch was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai), 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
| cognee | LangWatch | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 4.8K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 3.1K | ⑂ 395 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick cognee if
- You weight community size — 31K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick LangWatch if
- You want the LangWatch feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and LangWatch fits your workflow better
About cognee
Cognee is an open source AI memory platform for agents, released under the Apache 2.0 license and written in Python. It ingests data in any format and builds a self hosted knowledge graph that agents query to recall, connect, and act with full context across sessions. The project lives in the Python ecosystem, installs through standard package managers, and sits in the AI and machine learning infrastructure category alongside graph databases and context engineering tooling. A companion research paper, "Optimizing the Interface Between Knowledge Graphs and LLMs for Complex Reasoning" by Markovic et al., 2025, docu…
read the full cognee overview →
About LangWatch
LangWatch is an open source TypeScript platform for LLM evaluations and AI agent testing, licensed under Apache 2.0. It lives in the machine learning infrastructure ecosystem for teams that build LLM powered agents and need to test, simulate, evaluate, and monitor agents before release and in production.
read the full LangWatch overview →
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Frequently asked questions
Is cognee or LangWatch more popular?
cognee has 30,848 GitHub stars and LangWatch has 4,833. cognee has the larger community by that measure.
Are cognee and LangWatch free?
Both are open source. cognee is licensed under Apache-2.0 and LangWatch under Apache-2.0. Neither carries a licence fee.
What is the difference between cognee and LangWatch?
cognee is written in Python and LangWatch in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, cognee or LangWatch?
Choose cognee if you want the larger community (30,848 stars) or its Apache-2.0 licence terms. Choose LangWatch if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.