# Langfuse vs Promptfoo

Langfuse is freemium — a usable free tier with paid plans above it. Promptfoo is freemium — a usable free tier with paid plans above it.

| | Langfuse | Promptfoo |
|---|---|---|
| Pricing | Free tier + paid plans | Free tier + paid plans |
| Free to start | Yes | Yes |
| Category | AI Models & Local Execution | AI Models & Local Execution |
| Type | LLM Eval & Observability | LLM Eval & Observability |
| Best for | Fully open-source and self-hostable for free via Docker Compose/Kubernetes, not just a hosted SaaS | Open-source CLI/library for evaluating prompts, models and RAG pipelines side by side, runs in CI |

## FAQ

### Langfuse vs Promptfoo: what is the difference?

Langfuse is freemium — a usable free tier with paid plans above it and is listed for fully open-source and self-hostable for free via Docker Compose/Kubernetes, not just a hosted SaaS. Promptfoo is freemium — a usable free tier with paid plans above it and is listed for open-source CLI/library for evaluating prompts, models and RAG pipelines side by side, runs in CI. Both sit in LLM Eval & Observability.

### Is Langfuse or Promptfoo cheaper to start with?

Neither — Langfuse and Promptfoo are both freemium, so the choice comes down to capability rather than cost. Both entries list what they uniquely do above.

### Which should I choose, Langfuse or Promptfoo?

Choose Langfuse if you need fully open-source and self-hostable for free via Docker Compose/Kubernetes, not just a hosted SaaS; choose Promptfoo if you need open-source CLI/library for evaluating prompts, models and RAG pipelines side by side, runs in CI. Flocci AI Tools does not rank one above the other — it shows both feature sets side by side and lets the requirement decide.

## Related

- [Langfuse](https://aitools.flocci.in/tool/langfuse)
- [Promptfoo](https://aitools.flocci.in/tool/promptfoo)
- [Langfuse alternatives](https://aitools.flocci.in/alternatives/langfuse)
- [Promptfoo alternatives](https://aitools.flocci.in/alternatives/promptfoo)
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Source: Flocci AI Tools — https://aitools.flocci.in/compare/langfuse-vs-promptfoo

Facts last verified: October 2026