These tools integrates with

LangfusevsPromptFoo

OSS LLM engineering platform (acquired by ClickHouse, Jan 2026) versus CLI/library for prompt testing and red-teaming

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Choose Langfuse when…

  • •You want open-source LLM observability
  • •Self-hosting your tracing stack is important
  • •You need cost tracking across models and users

Choose PromptFoo when…

  • •You want CLI-first, config-driven LLM evals
  • •Running eval suites in CI/CD pipelines is a goal
  • •You need red-teaming and safety testing built in

Side-by-side comparison

Field
Langfuse
PromptFoo
Category
Observability
Prompt & Eval
Type
Open Source
Open Source
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Cloud: $59/mo
—
GitHub Stars
⭐ 7,000
⭐ 5,000
Health
●95 — Active
●95 — Active

Langfuse

Open-source platform for tracing, evaluations, and prompt management. Self-hostable alternative to LangSmith with broad framework support. Acquired by ClickHouse in January 2026; OSS core continues with deeper ClickHouse-backed analytics.

Website ↗GitHub ↗

PromptFoo

Test and compare prompts across models. Built-in red-teaming, regression testing, and side-by-side model comparison.

Website ↗GitHub ↗

Shared Connections3 tools both integrate with

DeepEvalOpenAI APIAgenta

Only Langfuse (28)

Claude CodeCrewAICursorLangGraphLangChainOpenHandsAutoGenLlamaIndexDifyMastra

Only PromptFoo (3)

LangfuseVellumGalileo

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