Langfuse
Open-source LLM engineering platform: traces, evals, prompts
Langfuse (langfuse.com) Review
Langfuse is an open-source LLM engineering platform for tracing, evaluating, and debugging AI applications. It ingests traces from SDKs or its API, supports prompt management with versioning, evaluation pipelines, and detailed cost analytics per user, session, and feature. The software is MIT-licensed and self-hostable. Its managed cloud offers a free Hobby plan that needs no credit card; paid cloud plans start at $199 per month (Pro) with an Enterprise tier at $2,499 per month. APIs and SDKs for Python and JavaScript are available on all plans, making it a common self-hosted alternative for LLM observability.
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Key Capabilities & Features
- •Open-source LLM tracing (MIT license)
- •Prompt management with versioning
- •Evaluation pipelines and scoring
- •Cost analytics per user and session
- •Free Hobby cloud plan, no credit card
- •Python and JavaScript SDKs and API
Pricing, Access & Specs
✓ Strengths & Highlights
- Analytics
✕ Potential Drawbacks
- Plan limits change; confirm current terms on the official pricing page.
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