Open-source developer tools you can self-host

Tools developers use every day, from a code editor in the browser to error tracking and AI tracing, that you can run on your own infrastructure.

3 open-source projects, checked against GitHub on 1 November 2026.

All 3 developer tools projects

Showing all 3, ordered by health score.

  1. 85 Active
    code-server

    VS Code in the browser

    MIT
    Setup
    Docker
    Stars
    79.7k
    Release
    29 October 2026
  2. 85 Active
    Sentry

    Developer-first error tracking and performance monitoring

    Functional Source License source-available
    Setup
    Docker
    Stars
    45.7k
    Release
    28 October 2026
  3. 80 Active
    Langfuse

    Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.

    MIT paid features in repoCLA
    Setup
    5 of 5
    Stars
    36.8k
    Release
    29 October 2026

Our picks by use case

  • VS Code in the browser

    code-server runs Visual Studio Code on your server, so any device with a browser gets the same environment.

  • Error tracking and performance monitoring

    Sentry groups crashes into issues with stack traces and release context; it is source-available rather than open source.

    • SentryFunctional Source Licensesource-availablehealth 85

  • Tracing and evaluating LLM applications

    Langfuse records model calls and agent steps, versions prompts and runs evaluations on test datasets.

    • LangfuseMITpaid features in repohealth 80

How to choose a self-hosted developer tool

This category collects tools that replace paid developer services. Their setup varies widely: a browser editor runs as one process, while monitoring platforms bring their own databases and queues. Licenses vary too, and some projects keep enterprise features in separate folders.

License

code-server is MIT. Sentry uses the Functional Source License, which forbids competing products and turns each release into Apache-2.0 after two years. Langfuse is MIT outside its ee folders, which hold the paid features.

Setup weight

code-server needs a small Linux server. The Langfuse compose file runs ClickHouse, PostgreSQL, Redis and MinIO, and self-hosted Sentry is a large stack of its own, so size the server before you start.

Security

A browser IDE gives a shell to whoever logs in, and monitoring tools receive data from your production systems. Put them behind authentication and HTTPS, limit who can reach them and keep them updated.

Drafted with AI from the projects’ READMEs and our data, then checked against that data on 31 October 2026. Report a correction

Which of these are really open source?

Fully open source (1)OSI-approved license, no paid parts in the repository
code-server
Open source with paid parts (1)OSI license, but some features are under commercial terms
Langfuse
Not OSI open source (1)Code is public, use is restricted
Sentry (Functional Source License)

Read automatically from each repository’s license files every day. How we read licenses

Questions about open-source developer tools

What are the most popular open-source developer tools projects?

By GitHub stars: code-server (79.7k), Sentry (45.7k), Langfuse (36.8k). By our health score, the most actively maintained are code-server (85), Sentry (85), Langfuse (80).

Which developer tools projects are fully open source?

1 of the 3 use an OSI-approved license with no paid parts in the repository, including code-server.

Other categories