← Glossary · Concepts

open source

Concept

Fact-checked May 20, 2026

Also called: OS, open-source software, open-source project

Open source refers to software or projects where the original source code is made freely available and can be modified and distributed by anyone.

When something is "open source," it means its blueprints, usually its code, are openly accessible to the public. You don't need special permission or a license to see how it works, change it, or even share your own improved version. This is different from "closed source" software, where only the original creators can see and modify the code.

The open source philosophy encourages transparency, collaboration, and community input. Many key technologies that power the internet and AI today, like Linux, Python, and even some advanced AI models, are developed and maintained using open source principles. This collective effort often leads to more robust, secure, and innovative solutions as many eyes can review and contribute to the project.

For AI, open source models and frameworks mean that researchers and developers worldwide can experiment, build upon, and contribute to the advancements without proprietary restrictions. This accelerated pace of innovation has been crucial in the rapid development of artificial intelligence.

Learn AI in 5 minutes a day.

Daily Deck explains terms like open source as part of a free seven-card daily brief. No jargon. No fluff.

Start free