Roo Code vs Aider

Detailed side-by-side comparison to help you choose the right tool

Roo Code

🔴Developer

AI Coding Assistant

Discontinued VS Code coding agent (shut down May 15, 2026). Known for custom "modes," per-mode MCP allow-lists, and Boomerang sub-agent tasks. Migrate to ZooCode or Cline.

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Starting Price

Custom

Aider

🔴Developer

AI Coding Assistant

Open-source terminal coding agent that pairs with git, edits multiple files at once, and works with any leading LLM.

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Starting Price

Free

Feature Comparison

Scroll horizontally to compare details.

FeatureRoo CodeAider
CategoryAI Coding AssistantAI Coding Assistant
Pricing Plans210 tiers14 tiers
Starting PriceFree
Key Features
  • Custom "modes": Architect, Code, Ask, Debug, and custom roles with per-mode system prompts
  • Per-mode MCP server allow-lists (Debug can call DevTools, Ask cannot)
  • In-editor MCP marketplace and server templates
  • Terminal-based AI pair programming
  • Direct file editing with Git auto-commits
  • Multi-model support (Claude, GPT-4o, DeepSeek, local)

Roo Code - Pros & Cons

Pros

  • Open Apache 2.0 source is preserved — the interesting ideas (modes, per-mode MCP, Boomerang) live on
  • Historical proof point for per-mode agent design that successor tools are now adopting
  • BYOK meant no vendor lock-in for anyone who used it
  • Aggressive MCP support led the industry in the 2025–2026 window
  • Migration path is clear: ZooCode is a near drop-in replacement

Cons

  • No longer maintained — do not adopt for new work in mid-2026 or later
  • No official support channel beyond billing questions
  • Any bugs, security issues, or breaking VS Code API changes will not be fixed by Roo Code, Inc.
  • Community forks (ZooCode) inherit a large codebase that has to be understood before it can be extended
  • Anyone with an active Enterprise contract needs a migration plan immediately

Aider - Pros & Cons

Pros

  • Truly free and open-source (Apache 2.0) with no commercial upsell
  • Model-agnostic BYOK across 20+ providers, including self-hosted Ollama/vLLM
  • Every edit is a git commit with a real message — trivial to review and undo
  • Publishes the most-cited independent code-editing benchmark leaderboard
  • Runs in any terminal — no IDE lock-in, works over SSH and inside tmux

Cons

  • Terminal-only; no IDE UI for hover, inline diff, or CodeLens-style affordances
  • Steep learning curve compared to click-to-accept IDE agents like Cursor
  • Repo-map indexing on huge monorepos can chew tokens and needs manual tuning
  • MCP client support is still marked experimental

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