LLM observability and evals
Langfuse
Open-source platform for tracing, evaluating and debugging LLM applications and agents, with prompt management and datasets. It is available as a hosted service (Langfuse Cloud) or can be self-hosted with Docker Compose or Kubernetes.
- Pricing model
- Free tier and paid plans
- Free tier
- Yes
- Self-hostable
- Yes
- Open source
- Yes (MIT)
Langfuse pricing
from $29.00 per month
Checked Nov 8, 2026 on the vendor's pricing page. Not monitored.
Current pricing → (opens in a new tab)Langfuse works with 15 of the LLM providers we track
Each is documented in Langfuse's own docs, shown with its lowest current rate from the prices we track, per 1M input tokens. Langfuse may support providers we don't track, and can reach any OpenAI-compatible endpoint; its documentation (opens in a new tab) has the full list.
