Plandex AI

Plandex is a terminal-based AI coding agent built for large, real-world development tasks. Instead of one-shot code completion, it plans multi-file changes step by step and reviews them in an isolated sandbox before anything touches your project files.

Key Features

• Chat mode for brainstorming with the agent
• Tell mode that breaks tasks down and executes them sequentially
• Diff review sandbox — changes isolated until you approve
• Huge context window for large codebases
• Self-hosted open-source option with your own API keys

Pricing

Free and open-source (self-hosted with your own API keys). Cloud plans include model credits. Verify current pricing on the official site.

Pros and Cons

Pros:

• Excellent for complex multi-file refactors
• Sandbox prevents the agent from damaging your project
• Open-source and self-hostable for privacy

Cons:

• Terminal-only — no traditional IDE integration
• Limited Windows support

How to Use Plandex AI

1. Click the button below to open the official website.
2. Sign up, then install the extension or connect your code editor.
3. Describe what you want to build, or paste the code you want explained or fixed.
4. Review the AI suggestions, completions, or fixes carefully.
5. Accept the changes you want and test the code in your own project.
6. Use the chat or agent mode for bigger multi-file tasks.