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 (562)
Memory engine and app that is extremely fast, scalable. The Memory API for the AI era.
Container runtimes on macOS with minimal setup
Build system optimized for JS/TS monorepos
The Symfony PHP framework
The batteries-included agent harness.
Every agent's model. One place. Codex on DeepSeek, Claude Code on Kimi, from the menu bar.
Find secrets with Gitleaks 🔑
Unlimited OCR Works: Welcome the Era of One-shot Long-horizon Parsing.
Light, fluffy, and always free - The AWS Local Emulator alternative
Feature-rich ORM for Node.js
Open source secret management platform
Monorepo platform for developers and AI agents
Array framework for Apple silicon
🗃 Open source self-hosted web archiving. Takes URLs/browser history/bookmarks/Pocket/Pinboard/etc., saves HTML, JS, PDFs, media, and more...
Scalable load tests in plain Python
REST API for any Postgres database
Find and fix problems in your JavaScript code
C++ Library Manager for Windows, Linux, and MacOS
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.
This guide is for informational purposes only and does not constitute legal advice. For licensing decisions in commercial products, consult a qualified attorney.