Overview
Roo Code is an open-source AI programming assistant plugin for VS Code (formerly Roo Cline), completely free and open-source, allowing users to bring their own API Key to access any large model. It is known as the "open-source alternative to Cursor," with its GitHub star count continuously rising, making it the top choice for self-deployment and cost-saving users.
Core highlights: Built-in multiple preset modes (Code, Architect, Ask), supports custom modes; compatible with all mainstream APIs including OpenRouter, Anthropic, Google Gemini, DeepSeek, SiliconFlow; supports MCP (Model Context Protocol) for extending external tools; provides complete Agent capabilities for file editing, command line execution, and browser automation.
Key Features
- Completely Open Source and Free: One-click install from VS Code marketplace, code fully open-source and auditable
- Switch Between Multiple Models Freely: Supports all mainstream models including OpenRouter, Anthropic, DeepSeek, Gemini, SiliconFlow
- Multiple Preset Modes: Built-in modes like Code, Architect, Ask, with support for custom modes
- Complete Agent Capabilities: File creation and editing, command line execution, build testing, browser automation
- MCP Protocol Support: Extends external tools via Model Context Protocol, rich ecosystem
- Adaptive Autonomous Mode: Flexible switching between manual, automatic, and hybrid modes, with flexible control over execution boundaries
Use Cases
- Developers who want Cursor's capabilities but don't want to pay for a subscription
- Enterprise internal use requiring open-source and auditable AI tools
- Users who want to pair with cheap APIs like DeepSeek or SiliconFlow
- Combination of locally deployed large models and AI programming assistants
- Users accustomed to the VS Code ecosystem who don't want to switch IDEs
Pros
- Completely free and open-source under Apache 2.0 license
- Works within VS Code, no need to switch IDEs
- Free switching between multiple models, lowest cost
- Good plugin ecosystem, strong MCP extension capabilities
- Supports local large model deployment
- Active community, fast iteration
Pricing
The plugin itself is completely free. Usage cost depends on the chosen API: DeepSeek V4-Pro approximately $0.06 per million tokens (cache hits reduce by 90%), Claude Sonnet 4.7 approximately $3 per million input tokens. Heavy usage monthly cost typically $5-30.
Summary
Roo Code is the most mature choice among "open-source alternatives to Cursor." If you are a heavy VS Code user, want to save on subscription fees, or need an enterprise-grade auditable AI programming tool, Roo Code is currently the best solution. Paired with DeepSeek, monthly costs can even be under $5, offering unbeatable value.
Version History
- Roo Code 3.x (2026): Independent evolution after forking from Cline: Multi-Mode (Code/Architect/Ask/Debug) + MCP Tool Market + Memory Bank for long-term context
- Roo Code Early (2024-2025): Independent branch from Roo Cline, VS Code plugin downloads entered top three in AI programming category