MIT License
Do whatever you want. Just keep the copyright notice.
Commercial use
✓ Yes
Modify
✓ Yes
Distribute
✓ Yes
Must open source changes
✗ No
Must attribute
✓ Yes
Patent grant
✗ No
What this license means
The MIT License is the most popular open source license. It lets you use, copy, modify, merge, publish, distribute, sublicense, and sell the software — with essentially no restrictions. The only requirement is that you include the original copyright notice and license text in any copy or substantial portion of the software.
When you encounter this license
Use MIT-licensed tools freely in any project — personal, commercial, proprietary. You can bundle it, modify it, sell products built with it. Just keep the license file somewhere in your project. This is the easiest license to work with.
Watch out for
No patent grant — if the software implements a patented algorithm, the MIT license doesn't protect you from patent claims. No warranty, no liability — standard for all OSS licenses.
Tools using MIT License (199)
Self-hosted Git service
Explore layers in a Docker image
Independent publishing platform with memberships and newsletters
Opinionated code formatter
Fast, reliable browser testing
Platform for universal React apps
Framework for orchestrating autonomous AI agents
Extremely fast Python linter and formatter, written in Rust
Delightful JavaScript testing
Open source Slack/Teams alternative
Open-source AI engine, run any model locally
Open source IDE for exploring and testing APIs
TypeScript-first schema validation with type inference
SDK and proxy to call 100+ LLM APIs in OpenAI format
Open source fullstack Next.js framework with backend superpowers
Extremely fast bundler for the web
Express-inspired web framework for Go
A cross-platform desktop All-in-One assistant tool for Claude Code, Codex, OpenCode, openclaw & Gemini CLI.
A new type of shell
Open source notification infrastructure
This guide is for informational purposes only and does not constitute legal advice. For licensing decisions in commercial products, consult a qualified attorney.