Quick facts
- Best for
- Langfuse - Open-Source LLM Observability and Evals
- Pricing
- Free
- Editor rating
- 4.5 / 5
- Community saves
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About Langfuse
Langfuse is an open-source AI engineering platform for LLM observability, evaluation, prompt management, metrics, playground testing, and datasets. The repository metadata lists integrations and topics around OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, LlamaIndex, monitoring, analytics, prompt engineering, and self-hosted LLMOps workflows.
Pros
- Capture and inspect LLM traces across application runs
- Run evaluations on datasets and compare outputs over time
- Manage prompts and test changes in a playground workflow
- Connect with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and related LLM tooling
- Use self-hosted deployment paths for teams that need more control
Cons
Pricing
Open source
$0
- • Public source code is available
- • No required license fee is listed in the GitHub repository metadata
- • Hosting, storage, model APIs, cloud services, or commercial support can add costs