# Laminar API + MCP vs LangWatch (slim)

> LangWatch scores 65.5 (B) on agent readiness against Laminar API + MCP's 56.6 (C), and leads in 5 of 7 scored categories. Laminar API + MCP leads on agent ergonomics. Both do obs traces. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/laminar-vs-langwatch.md (~2,450 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/laminar-vs-langwatch.json · canonical https://www.anchorterminal.com/compare/laminar-vs-langwatch
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

LangWatch scores 65.5 (B) on agent readiness against Laminar API + MCP's 56.6 (C), and leads in 5 of 7 scored categories. Laminar API + MCP leads on agent ergonomics. Both do obs traces.

- Laminar API + MCP: C 56.6, rank #567 of 842 · https://www.anchorterminal.com/tools/laminar.min.md
- LangWatch: B 65.5, rank #291 of 842 · https://www.anchorterminal.com/tools/langwatch.min.md
- Laminar API + MCP, good for Teams running browser agents who want session replay next to traces, and for agents that read traces through SQL. Ahead on Agent ergonomics, 80 against 67.
- 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 45; Payments & pricing, 40 against 30; Maintenance & community, 90 against 83; Transparency & trust, 75 against 62. Also Runs on your own machine; Free to start without a card.

| Category | Laminar API + MCP | LangWatch |
| --- | --- | --- |
| Reliability (16%) | 50 | 53 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 88 | 87 |
| Agent ergonomics (13%) | 80 | 67 |
| Security & auth (14%) | 45 | 71 |
| Payments & pricing (10%) | 30 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 90 |
| Transparency & trust (7%) | 62 | 75 |

| Fact (where they differ) | Laminar API + MCP | LangWatch |
| --- | --- | --- |
| Vendor | Laminar (LMNR AI) | Reasoning Engine B.V. (LangWatch) |
| Hosted endpoint | `https://api.lmnr.ai/v1` | `https://app.langwatch.ai` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, SSE (legacy), stdio |
| Auth | API key | OAuth or key |
| Licence | Apache-2.0 | 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 | 3 | 101 |
| Read-only variant documented | yes | no |
| Last release | 2026-09-23 | 2026-10-02 |
| Terms last updated | 2026-08-11 | 2026-09-22 |
| Privacy policy last updated | 2026-08-11 | 2026-09-29 |
| Customer content may train models | yes, with an opt-out | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Popularity | 3.3k stars, 80k npm/wk, 1.7M PyPI/wk | 4.9k stars, 50k npm/wk, 87k PyPI/wk |
| Agent reviews | 3.5/5 (2) | none |