Best CodeMix Alternatives & Competitors in 2025

Text and code editor where Outlines are first class citizen.

Open Source

An advanced, highly flexible, and easy-to-use programming editor for your Mac.

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.

PaizaCloud IDE is a programming platform that allows developers to do coding efficiently.

Vim inspired — Faster as in less keystrokes — Multiple selections — Orthogonal design

PyScripter is a free and open-source Python Integrated Development Environment (IDE) created with...

A community-driven Emacs distribution - The best editor is neither Emacs nor Vim, it's Emacs *and* Vim! - syl20bnr/spacemacs

Default IDE which come installed with the Python programming language.

Cloud9 IDE is one of the best online integrated development environment that introduced as open-source from version 2.

Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.

Android development environment based on IntelliJ IDEA

Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.

Open Source

Codeanywhere is a complete toolset for web development. Enabling you to edit, collaborate and run your projects from any device.