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Langfuse

Open observability for LLMs.

★★★★☆ 4.4 4,200 saves Starting price: Free

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Tool information

Langfuse traces LLM calls, scores outputs, and manages prompts with open-source observability.

In-depth review

Open observability for LLMs. Langfuse competes in the AI Model Training category, where our editors have reviewed 294 tools so far. It has been bookmarked by 4,200 readers, making it one of the most discussed options in its class. This in-depth review breaks down exactly where Langfuse shines, where it falls short, and who should choose it.

In real-world use, Langfuse's clearest strengths are Open-source tracing; Prompt management; Scores; Self-host; Fast. These advantages matter most for Tracing, Prompts, Scores — the exact workload Langfuse was designed around. Readers who prioritise these qualities consistently rank it among their favourites in AI Model Training.

No tool is perfect — before you commit, weigh Observability only; Setup instrumentation; Pricing scales. Langfuse pricing starts at Free. Always confirm the latest plans on the official website, because prices change often. Because you can evaluate the full experience free of charge, Langfuse is a low-risk tool to try this week. Langfuse is a solid, well-reviewed choice in AI Model Training and deserves a place on your shortlist.

How Langfuse compares

Langfuse is rated 4.4 out of 5, below the AI Model Training category average of 4.5 across 294 rated tools. Its closest alternatives are Entry Point AI, Roboflow, Labelbox. Popular alternatives include Entry Point AI, Roboflow, Labelbox. Compare their pricing, ratings, and reviews before you decide.

Applicable tasks

Pricing

Langfuse pricing starts at Free. Always confirm the latest plans on the official website, because prices change often.