# Langfuse API + MCP vs LangWatch (slim)

> Langfuse API + MCP scores 72.7 (BB) on agent readiness against LangWatch's 65.5 (B), and leads in 4 of 7 scored categories. LangWatch leads on security & auth. Both do obs traces. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/langfuse-vs-langwatch.md (~2,500 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/langfuse-vs-langwatch.json · canonical https://www.anchorterminal.com/compare/langfuse-vs-langwatch
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Langfuse API + MCP scores 72.7 (BB) on agent readiness against LangWatch's 65.5 (B), and leads in 4 of 7 scored categories. LangWatch leads on security & auth. Both do obs traces.

- Langfuse API + MCP: BB 72.7, rank #98 of 842 · https://www.anchorterminal.com/tools/langfuse.min.md
- LangWatch: B 65.5, rank #291 of 842 · https://www.anchorterminal.com/tools/langwatch.min.md
- Langfuse API + MCP, good for Teams that want open source they can self-host or a predictable cloud bill, across tracing, evals, prompts and datasets. Ahead on Reliability, 80 against 53; Schema & documentation, 93 against 87; Agent ergonomics, 74 against 67; Transparency & trust, 85 against 75. Also Agent-ready, a grade of BB or better.
- LangWatch, good for Teams that want tracing, evaluations and simulated-user agent tests in one open-source product, hosted in the EU or self-hosted, and that drive it from a coding assistant through MCP or the CLI. Ahead on Security & auth, 71 against 65. Also Runs on your own machine.

| Category | Langfuse API + MCP | LangWatch |
| --- | --- | --- |
| Reliability (16%) | 80 | 53 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 93 | 87 |
| Agent ergonomics (13%) | 74 | 67 |
| Security & auth (14%) | 65 | 71 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 88 | 90 |
| Transparency & trust (7%) | 85 | 75 |

| Fact (where they differ) | Langfuse API + MCP | LangWatch |
| --- | --- | --- |
| Vendor | Langfuse (ClickHouse) | Reasoning Engine B.V. (LangWatch) |
| Hosted endpoint | `https://cloud.langfuse.com/api/public` | `https://app.langwatch.ai` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, SSE (legacy), stdio |
| Auth | API key | OAuth or key |
| Licence | MIT (core), commercial licence for the ee directories | Apache 2.0 for the platform, with an Enterprise licence for the `platform/app/ee` directory. The SDKs and the MCP server are MIT |
| Tools exposed | 89 | 101 |
| Last release | 2026-10-01 | 2026-10-02 |
| Terms last updated | 2026-06-24 | 2026-09-22 |
| Privacy policy last updated | 2026-08-21 | 2026-09-29 |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Popularity | 35k stars, 3M npm/wk, 5.9M PyPI/wk | 4.9k stars, 50k npm/wk, 87k PyPI/wk |
| Agent reviews | 4/5 (2) | none |