LangWatch
LLM observability and evaluation with OpenTelemetry support
⭐ 2,000 stars● Health 70/100 — Active· commit recency (40 pts) · star momentum (30 pts) · issue ratio (20 pts) · forks (10 pts)App Infrastructure
About
Open-source LLM observability and evaluation platform with OpenTelemetry-native tracing. Provides trace visualization, automated LLM-as-judge evaluations, dataset management, and prompt versioning. Self-hostable with a managed cloud option.
Choose LangWatch when…
- •You want OpenTelemetry-native LLM tracing without vendor lock-in
- •You need combined tracing and automated evaluation in one platform
- •You prefer self-hosting your observability stack
Builder Slot
How do you see what's happening?Recommended for most stacks
Traces every LLM call, eval, and cost so you know exactly what your stack is doing
Dev Tools
Not applicable
App Infra
Recommended
Hybrid
Recommended
Other tools in this slot:
Stack Genome Detection
AIchitect's Genome scanner detects LangWatch in your project via these signals:
pip packages
langwatchenv vars
LANGWATCH_API_KEYIntegrates with (1)
Alternatives to consider (2)
Pricing
✦ Free tier available
Cloud$99/mo
Recent Activity
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