LangWatch
An AI engineering platform for tracing model and tool calls, testing agents with simulated conversations, evaluating outputs and managing prompts.
About LangWatch
Teams need to reproduce agent failures and connect evaluation results to production traces and costs.
Who it’s for
- Developers testing and debugging AI agents
- AI platform teams monitoring production model usage
When to consider it
Consider LangWatch when you want agent simulations, evaluations and production tracing in one platform.
Tradeoffs & limitations
- The free Developer cloud plan includes 50,000 events per month, 14-day data access and two users, with three scenarios, three simulations and three custom evaluations. The core uses Apache-2.0; enterprise modules require a commercial license for production use.
SOTA overview · Documentation-based assessment · Sources & review method
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Sources & review method
Documentation-based assessment · Oct 15, 2026 · Prepared with AI assistance; not a hands-on benchmark.
- LangWatch tracing, agent simulations, evaluations and prompt management
- Developer cloud plan and its usage limits
- Official repository: Apache-2.0 core and commercial enterprise modules
- Official repository commit history: latest commit on 2026-10-15
Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.
Import history & original evidence
LangWatch official website
An AI engineering platform for tracing model and tool calls, testing agents with simulated conversations, evaluating outputs and managing prompts.
Based on official pages and announcements checked on 2026-10-15. No hands-on test, performance benchmark or popularity ranking is claimed.