Langfuse vs Promptfoo
| Tagline | Open-source LLM engineering platform | Test and red-team LLM apps |
|---|---|---|
| Category | AI Agents | AI Agents |
| Pricing | Open Source | Open Source |
| Upvotes | 0 | 0 |
| Comments | 0 | 0 |
| Page views | 0 | 0 |
| Click-through to site | 0.0% | 0.0% |
| Readiness Score | 76/100 | 90/100 |
| Launched | Oct 5, 2026 | Oct 5, 2026 |
| Maker | — | — |
What is Langfuse?
Langfuse provides tracing, prompt management and evaluations for LLM applications and agents, self-hosted or in the cloud.
What is Promptfoo?
Promptfoo runs evaluations and security tests against prompts, models and agents.
Not sold on either? See alternatives to Langfuse or alternatives to Promptfoo.
Verdict
Promptfoo leads on 1 of the measurable metrics above (votes, engagement, click-through and readiness). Choose Langfuse if you want open-source LLM engineering platform; choose Promptfoo if you want test and red-team LLM apps.
Is Langfuse better than Promptfoo?
On AskableHQ's community and engagement data, Promptfoo currently performs better, but the right choice depends on your use case.
Which is cheaper, Langfuse or Promptfoo?
Langfuse is Open Source; Promptfoo is Open Source. Check each website for current plans.