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Langfuse

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An open-source platform for tracing, evaluating and managing prompts for LLM applications.

Open-source alternative to:

Visit LangfuseGitHubDocs
MITSelf-hostedCloudSome features paywalled
Screenshot of the Langfuse website
Homepage of langfuse.com

What the free edition leaves out

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The free edition is genuinely usable, but some team or enterprise features need a paid plan. “Not confirmed” means the official pages we read did not say, so we do not guess.

Open-core feature checklist for Langfuse
FeatureFree editionDetailsSource
SSO / SAMLPaidThe self-hosting pricing page lists Enterprise SSO (Okta, Microsoft Entra ID) and SSO enforcement as Enterprise features; it does not name SAML.Source ↗
Role-based access controlFreeOrganization-level role-based access control is free; project-level RBAC is Enterprise only.Source ↗
Audit logsPaidAudit logs are listed as Enterprise only for self-hosted.Source ↗
Multi-user / teamsFreeUnlimited users and projects in the open-source plan; restricting who can create organizations is Enterprise only.Source ↗
Backups and restoreNot confirmedBackup is not listed in the plan comparison, and the docs say the Docker Compose setup has no backups. Scheduled export is a data export, not a backup tool.Source ↗
API accessFreeThe public API is included; the Admin, SCIM and Instance Management APIs are Enterprise only.Source ↗
Support SLAPaidThe support SLA and a named lead support engineer are Enterprise only; open source gets community support.Source ↗

Best for

Teams that want open-source LLM tracing, prompt management and evaluation with unlimited users and projects, and can run Postgres, ClickHouse, Redis and S3 themselves.

Why choose it over LangSmith

The core is MIT-licensed and self-hostable, and the free edition has unlimited users and projects plus SSO and organization-level access control. Self-hosting is an official, documented option with Kubernetes and cloud-provider guides.

Where it falls short

Self-hosting needs four stateful services plus two app containers, and the compose setup has no high availability, scaling or backups. Audit logs, project-level RBAC, the SCIM and admin APIs and a support SLA are paid Enterprise features. No built-in backup tooling is documented, so you own database backups.

Open-source alternative to

  • LangSmith — Langfuse is an open-source, self-hostable alternative to LangSmith for teams that want control of their LLM trace data.

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