Langfuse
What it is
Langfuse is an open-source LLM engineering platform for tracing, evals and datasets. You can use the hosted cloud or self-host it, and it supports OpenTelemetry.
Best for
#1 of 3Evals for Build a customer-support agent
Total 8.0 / 10
- Tracing depth & debugging (25%)8 / 10
Evidence:0042 (source: Langfuse)
- Eval features (25%)8 / 10
Evidence:0041 (source: Langfuse)
- Integration effort (20%)8 / 10OTel + framework integrations. Editorial read of docs; no own test yet.
Evidence:0042 (source: Langfuse)
- Cost / free tier (15%)8 / 10Hobby free 50k units/mo.
Evidence:0039 (source: Langfuse)
- Openness / self-host (15%)8 / 10Self-hostable.
#1 of 3Evals for Build a deep-research agent
Total 8.0 / 10
- Tracing depth & debugging (25%)8 / 10
Evidence:0042 (source: Langfuse)
- Eval features (30%)8 / 10
Evidence:0041 (source: Langfuse)
- Integration effort (15%)8 / 10OTel + framework integrations. Editorial read of docs; no own test yet.
Evidence:0042 (source: Langfuse)
- Cost / free tier (15%)8 / 10Hobby free 50k units/mo.
Evidence:0039 (source: Langfuse)
- Openness / self-host (15%)8 / 10Self-hostable.
Strengths
- Self-hostable, open-source core.0040 (source: GitHub)
- Online/offline evals, datasets and experiments.0041 (source: Langfuse)
- Tracing for LLM apps and agents with OpenTelemetry support.0042 (source: Langfuse)
Limits
- Enterprise features under ee/ directories use a separate commercial license.0057 (source: GitHub)
- Cloud Hobby is limited to 50k units/month with 30-day retention.0039 (source: Langfuse)
Pricing
Freemium
Cloud Hobby free (50k units/month); Pro $199/month; self-hosting supported.0171 (source: Langfuse)0039 (source: Langfuse)
As of . Check the vendor's page before buying.
License
Open source (MIT), except the ee/ directories (enterprise modules), which need a commercial license.0162 (source: GitHub)0163 (source: Langfuse)0166 (source: GitHub)
Checked .
Alternatives in the same layer
Disclosures
- None