Compare 3 reviewed substitutes for Langfuse
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LLM tracing and evaluation built on OpenTelemetry — run it in a notebook, a container or the free Phoenix Cloud tier, and keep the same spans when you move to Arize's commercial platform. Source-available under the Elastic Licence 2.0, not OSI open source.
Evaluation-first platform for AI products — scored evals in CI, a prompt playground over your own datasets, and production logging that feeds failures back into the next eval set.
Open-source LLM observability that starts as a one-line proxy change — request logging, caching, rate limiting and cost tracking, with an async SDK for teams that will not route traffic through a gateway.
The top alternatives to Langfuse include Arize Phoenix, Braintrust, Helicone. These observability & monitoring tools offer similar functionality with different pricing, features, and architectural approaches.
Langfuse offers a free tier with limited features. Paid plans are available for additional functionality.
Consider your team size, budget, technical requirements, and existing stack. Compare features like scalability, integrations, pricing model, and community support. Our side-by-side comparison pages can help you evaluate specific pairs.
Langfuse is a observability & monitoring tool. It competes with Arize Phoenix, Braintrust, Helicone in the observability & monitoring space.