# Self-hosted alternatives to Braintrust

The best self-hosted alternatives to Braintrust are Langfuse (highest rated, most GitHub stars), Opik (23 256 stars, Apache-2.0) and arize-phoenix (easiest to set up, newest release).

> 3 self-hostable, open-source alternatives to Braintrust, ranked by score.

Teams leaving Braintrust often want LLM tracing, evaluations and prompt work on infrastructure they run themselves. 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.

- [Langfuse](https://selfhost.directory/project/langfuse): Langfuse is an open-source platform for LLM engineering that assists teams in building, monitoring, evaluating, and debugging AI applications.
- [Opik](https://selfhost.directory/project/opik): Opik is an LLM observability and evaluation platform built by Comet.
- [arize-phoenix](https://selfhost.directory/project/arize-phoenix): Arize Phoenix is an AI observability and evaluation platform for teams building LLM applications and agents.

## Head-to-head

- [Langfuse vs Opik](https://selfhost.directory/compare/langfuse-vs-opik)
- [Langfuse vs arize-phoenix](https://selfhost.directory/compare/arize-phoenix-vs-langfuse)
- [Opik vs arize-phoenix](https://selfhost.directory/compare/arize-phoenix-vs-opik)

## Also in AI

Not listed as Braintrust alternatives, but from the same category:

- [Helicone](https://selfhost.directory/project/helicone): Helicone 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-forge](https://selfhost.directory/project/mcp-context-forge): An 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.
- [litellm](https://selfhost.directory/project/litellm): Self-hosted gateway unifying 100+ LLM providers under one OpenAI-compatible API with usage tracking, safety controls, and admin console.
- [Open-WebUI](https://selfhost.directory/project/open-webui): Open 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.
- [LocalAI](https://selfhost.directory/project/localai): LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.
- [nexus](https://selfhost.directory/project/nexus): Self-hosted AI router unifying MCP servers and LLM providers (OpenAI, Anthropic, Google, Bedrock) with OAuth2, rate limiting, and OpenTelemetry.

All 379 AI projects: https://selfhost.directory/ai

## About these Braintrust alternatives

3 open-source, self-hosted alternatives to Braintrust are listed here, ranked by popularity, maintenance and documentation.

- **Highest rated:** Langfuse (37 146 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](https://selfhost.directory/project/langfuse) | MIT | Typescript | 37 146 | Yes | Advanced | v4.76.0 2026-11-05 | 85 |
| [Opik](https://selfhost.directory/project/opik) | Apache-2.0 | Python | 23 256 | Yes | Moderate | 2.2.143 2026-11-06 | 82 |
| [arize-phoenix](https://selfhost.directory/project/arize-phoenix) | Elastic-2.0 | Python | 12 203 | Yes | Easy | @arizeai/phoenix-cli@1.20.1 2026-11-07 | 75 |

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Source: https://selfhost.directory/alternative-to/braintrust