Mellum-4b-base is JetBrains' first open-source large language model (LLM) optimized for code-related tasks.
Cost / License
- Free
- Open Source (Apache-2.0)
Application typeApplication types
Platforms
- Self-Hosted
- Python
Czechia
EU
Codex AlternativesOnly apps from the EU
The best alternative to Codex is Mellum, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Codex and 13 are so hopefully you can find a suitable replacement. Other interesting alternatives to Codex are Mistral Vibe for Code, JetBrains Junie, JetBrains AI Assistant and defract.
filter to find the best alternatives
Codex alternatives are mainly AI Coding Assistants, but if you're looking for IDEs or Large Language Model (LLM) Tools you can filter on that. Other popular filters include Open Source. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Codex.
Alternatives list
96 Mistral Vibe for Code alternativesLightning-fast completions, deep code understanding, and agentic software engineering—right where you work.
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Python
France- EU
+4
You think it, Junie helps make it happen – right in your IDE. Available on IntelliJ IDEA, PyCharm, WebStorm and .
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- Mac
- Windows
- Linux
- Czechia
- EU
+5
With JetBrains AI, your favorite tools gain new abilities while you are empowered with more information at your fingertips.
Cost / License
- Freemium
- Proprietary
Application type
Platforms
- JetBrains Rider
- CLion
- IntelliJ IDEA
- Pycharm
- PhpStorm
- RubyMine
- WebStorm
- ReSharper
- Czechia
- EU
defract is a local-first desktop app that orchestrates parallel Claude Code agents through a full development lifecycle — story, design, architecture, review, ship.
Cost / License
- Free
- Proprietary
Application typeApplication types
Platforms
- Mac
- Windows
Portugal- EU
+2
83 Hostinger Horizons alternativesAI-driven no-code platform to create full-stack web apps quickly, featuring instant one-click deployment, integrated hosting, domain tools, professional email, real-time editing, version control, and rapid live publishing with a streamlined three-step process.
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Online
- Software as a Service (SaaS)
Lithuania- EU
+2
Frontman is an AI Agent that lives in your browser, sees your live DOM, and turns your visual feedback into real changes - no more refresh-and-check cycles.
Cost / License
- Paid
- Open Source
Platforms
- Online
- Next.js
- Wordpress
Germany- EU
AICode is a VS Code extension that helps software developers maintain large, complex enterprise software using AI.
Cost / License
- Freemium
- Proprietary
Platforms
- Visual Studio Code
- France
- EU
Cost / License
- Free
- Open Source (Apache-2.0)
Application typeApplication types
Platforms
- Typescript
- Windows
- Mac
- Linux
- BSD
Netherlands- EU
+1
ShaggAi is a local-first AI automation and autocomplete platform that turns natural language into real actions on your PC and adds Copilot-style “ghost text” to almost any editor.
Cost / License
- Freemium
- Proprietary
Platforms
- Windows
- Linux
- Germany
- EU
+2
The self-hosted AI workflow automation platform for Git repositories (supports fully air-gapped operation)
Cost / License
- Free
- Open Source (MIT)
Platforms
- Docker
- Self-Hosted
- Germany
- EU
The production team for AI-built apps. Import your app, fix what's broken, start charging, keep it running. Replaces the engineer or freelancer builders would hire.
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- France
- EU
