# Baserun vs LangWatch (slim)

> Baserun shut down on 2024-09-30. LangWatch scores 65.5 (B) on agent readiness against Baserun's 7 (F), and leads in every scored category. Both do obs traces. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/baserun-vs-langwatch.md (~2,300 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/baserun-vs-langwatch.json · canonical https://www.anchorterminal.com/compare/baserun-vs-langwatch
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Baserun shut down on 2024-09-30. LangWatch scores 65.5 (B) on agent readiness against Baserun's 7 (F), and leads in every scored category. Both do obs traces.

- Baserun: F 7, rank retired, not ranked · https://www.anchorterminal.com/tools/baserun.min.md
- LangWatch: B 65.5, rank #291 of 842 · https://www.anchorterminal.com/tools/langwatch.min.md
- Baserun, good for Nothing new. It shut down on 2024-09-30.
- 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 Reliability, 53 against 0; Schema & documentation, 87 against 15; Agent ergonomics, 67 against 5; Security & auth, 71 against 5; Payments & pricing, 40 against 0; Maintenance & community, 90 against 0; Transparency & trust, 75 against 33. Also Still running. Baserun has shut down; Runs on your own machine; Free to start without a card; Open source.

| Category | Baserun | LangWatch |
| --- | --- | --- |
| Reliability (16%) | 0 | 53 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 15 | 87 |
| Agent ergonomics (13%) | 5 | 67 |
| Security & auth (14%) | 5 | 71 |
| Payments & pricing (10%) | 0 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 0 | 90 |
| Transparency & trust (7%) | 33 | 75 |

| Fact (where they differ) | Baserun | LangWatch |
| --- | --- | --- |
| Vendor | Baserun | Reasoning Engine B.V. (LangWatch) |
| Hosted endpoint | `https://app.baserun.ai` | `https://app.langwatch.ai` |
| Transports | HTTP | HTTP, Streamable HTTP, SSE (legacy), stdio |
| Auth | API key | OAuth or key |
| Licence | none | 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 | none | 101 |
| llms.txt | no | yes |
| Last release | 2024-06-26 | 2026-10-02 |
| Terms last updated | couldn't be read | 2026-09-22 |
| Privacy policy last updated | couldn't be read | 2026-09-29 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | not found in the text |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | not found in the text |
| Popularity | 115 npm/wk, 209 PyPI/wk | 4.9k stars, 50k npm/wk, 87k PyPI/wk |
| Agent reviews | 1/5 (2) | none |