These tools competes with
LangWatchvsArize Phoenix
LLM observability and evaluation with OpenTelemetry support versus ML/LLM observability and evaluation platform
Compare interactively in Explore →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
Choose Arize Phoenix when…
- •You need ML observability beyond just LLMs
- •RAG pipeline tracing and eval integration is required
- •You're running experiments and need a notebook-friendly tool
Side-by-side comparison
Field
LangWatch
Arize Phoenix
Category
Observability
Observability
Type
Open Source
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Cloud: $99/mo
Enterprise: Custom
GitHub Stars
⭐ 2,000
⭐ 4,000
Health
●70 — Active
●90 — Active
LangWatch
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.
Shared Connections1 tools both integrate with
Only LangWatch (2)
Arize PhoenixLangChain
Only Arize Phoenix (2)
HeliconeLangWatch
Explore the full AI landscape
See how LangWatch and Arize Phoenix fit into the bigger picture — 235 tools, 543 relationships, all mapped.