Plandex
Build real world software with AI
Founded
2023
Starting Price
Free
Category
AI Coding Assistants
Last updated March 14, 2026
About Plandex
Plandex is an open-source, terminal-based AI coding agent designed to handle large-scale development tasks spanning multiple steps and dozens of files. It features a sandbox for reviewing AI-generated code changes before they hit production, configurable autonomy levels, and supports up to 2M tokens of context.
Pros & Cons
Pros
- Completely free and open-source under MIT license
- Handles large codebases with up to 2M token context window
- Sandbox review prevents bad AI code from entering production
- Multi-model support eliminates vendor lock-in
- Automated debugging loops reduce iteration time
Key Features
Terminal-Based Workflow
Runs entirely in the terminal as a CLI tool, fitting naturally into existing developer workflows
Sandbox Change Review
All AI-generated changes staged in an isolated sandbox as a cumulative diff before reaching production code
Configurable Autonomy
Adjusts from fully automated execution to granular step-by-step manual control
Large Context Window
Handles up to 2M tokens of context using tree-sitter-based project mapping
Multi-Model Support
Integrates with Anthropic, OpenAI, Google, and open-source providers via OpenRouter
Automated Debugging
Runs terminal commands and browser-based debugging loops to identify and fix errors automatically
Branching and History
Full version control for AI plans including branching and rollback
Pricing
Self-Hosted (Free)
Free
- Full open-source codebase (MIT)
- All features included
- Bring your own API keys
- Unlimited plans and projects
- No usage caps
Best For
Large Refactoring Projects
Sweeping refactors touching dozens of files with sandbox review keeping changes coherent and safe
Multi-File Feature Development
End-to-end feature implementation spanning models, controllers, tests, and documentation
Automated Bug Fixing
Debugging loops that identify failing tests, trace errors, and apply fixes autonomously
Self-Hosted AI Coding
Teams wanting AI coding assistance without recurring SaaS fees
