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Langfuse vs LangSmith
A fact table for Langfuse and LangSmith (both in AI Developer Tools). For at least one of the two we could not confirm the pricing model from the vendor's pricing page, so check the vendor's site.
| Langfuse | LangSmith | |
|---|---|---|
| Category | AI Developer Tools | AI Developer Tools |
| What it does | Open-source LLM engineering platform for tracing, evaluation and prompt management. | Observability, evaluation and deployment platform for LLM applications. |
| Pricing model | Freemium Free tier plus paid plans | See site Pricing not confirmed here; see the vendor's site |
| Pricing source | Source: https://langfuse.com/pricing | Not confirmed here; check the vendor's site. |
| Official site | https://langfuse.com/ | https://www.langchain.com/langsmith |
| Link checked | 2026-11-01 | 2026-11-01 |
About this page. It only shows facts we can point to: category, official site and the pricing model shown on the vendor's pricing page when we could confirm it. It does not score features or pick a winner, since the better fit depends on what you need. Plans change often, so verify on each vendor's site.