Langfuse
AI
v4.76.0
Langfuse is an open-source platform for LLM engineering that assists teams in building, monitoring, evaluating, and debugging AI applications.2d agoMITDockerDemoAdvanced
Self-hosted alternatives to Braintrust
Teams leaving Braintrust often want LLM tracing, evaluations and prompt work on infrastructure they run themselves. More about Braintrust
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3 projects· by score
Projects
Also in AI
Not listed as Braintrust alternatives, but they cover the same ground and are worth a look.
heliconeHelicone is a self-hosted, open-source LLM observability platform and AI gateway for 100+ models with cost tracking, agent tracing, prompt management, and a playground.
mcp-context-forgeAn AI Gateway, registry, and proxy that sits in front of any MCP, A2A, or REST/gRPC APIs, exposing a unified endpoint with centralized discovery, guardrails and management. Optimizes Agent & Tool calling, and supports plugins.
litellmSelf-hosted gateway unifying 100+ LLM providers under one OpenAI-compatible API with usage tracking, safety controls, and admin console.
Open-WebUIOpen WebUI is a self-hosted AI platform connecting to Ollama and OpenAI-compatible APIs with RAG, plugins, voice/video calls, and enterprise auth on your hardware.
LocalAILocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.
nexusSelf-hosted AI router unifying MCP servers and LLM providers (OpenAI, Anthropic, Google, Bedrock) with OAuth2, rate limiting, and OpenTelemetry.
About these Braintrust alternatives
These projects are open-source and self-hostable. Langfuse is an LLM engineering platform covering tracing, prompt management, evaluations and analytics. Opik focuses on observability, with tracing, evaluation and production monitoring, and uses the Apache-2.0 licence. arize-phoenix adds OTLP tracing, LLM-as-judge evals, experiments and a prompt playground, and runs via pip, Docker or Kubernetes.
3 open-source, self-hosted alternatives to Braintrust are listed here, ranked by popularity, maintenance and documentation.
- Highest rated
- Langfuse (37 134 GitHub stars, MIT license, written in Typescript), followed by Opik and arize-phoenix
- Docker
- 3 of the top 3 ship an official Docker image
- Easiest to set up
- arize-phoenix
- Recently updated
- arize-phoenix @arizeai/phoenix-cli@1.20.1 on 2026-11-07
Braintrust alternatives compared
| Project | License | Language | Stars | Docker | Setup | Latest release | Score |
|---|---|---|---|---|---|---|---|
| Langfuse | MIT | Typescript | 37 134 | Yes | Advanced | v4.76.0 | 86 |
| Opik | Apache-2.0 | Python | 23 253 | Yes | Moderate | 2.2.143 | 82 |
| arize-phoenix | Elastic-2.0 | Python | 12 195 | Yes | Easy | @arizeai/phoenix-cli@1.20.1 | 75 |