Choose Langfuse if you need
- Integration with OpenAI, LangChain or LiteLLM. We haven't found them on LangSmith's website.
- SOC 2, ISO 27001, GDPR or HIPAA. We haven't found them on LangSmith's website.
At a glance
- Both have a free plan.
- Langfuse's lowest paid plan is Core at $29 per month, as of November 14, 2026.
- LangSmith's lowest paid plan is Plus at $39 per seat per month, then pay as you go, as of November 14, 2026.
- They list no integrations in common.
- Both list SSO.
- Only Langfuse lists SOC 2, ISO 27001, GDPR and HIPAA.
- Langfuse has a public API. We haven't confirmed one for LangSmith.
- Both can be self-hosted.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose LangSmith if you need
- Integration with OpenAI SDK, Anthropic SDK or Vercel AI SDK. We haven't found them on Langfuse's website.
Langfuse
Nobody has reviewed Langfuse yet. Its rating shows once it has 3 reviews.
Review Langfuse
LangSmith
Nobody has reviewed LangSmith yet. Its rating shows once it has 3 reviews.
Review LangSmithThe facts
- What it does
- LangfuseTrace, evaluate, and improve AI agents with one open platform.
- LangSmithComplete AI agent and LLM observability platform with tracing and real-time monitoring.
- Free plan
- LangfuseYes
- LangSmithYes
- Pricing
- LangfuseNot confirmed
- LangSmithNot confirmed
- Paid plans from
- Langfuse
What they share
From the platforms and integrations each website lists.
Integrations
BothNone in common
Only Langfuse
- OpenAI
- LangChain
- LiteLLM
- Anthropic
- OpenRouter
- PostHog
Only LangSmith
- OpenAI SDK
- Anthropic SDK
- Vercel AI SDK
- LlamaIndex
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between Langfuse and LangSmith yet.
Used either of them?
Your review makes this comparison better for the next person. Review Langfuse or review LangSmith.