Aider vs Devin: Side-by-Side Comparison 2026

Aider vs Devin comparison for 2026. Features, pricing, AI capabilities, and editor support analyzed side by side to help you choose the right coding tool for your workflow.

Aider is a CLI-based coding agent from Paul Gauthier (Open Source), ai pair programming in your terminal. Devin is an AI agent from Cognition, fully autonomous ai software engineer.

Aider

Open-source CLI tool for AI pair programming. Works with OpenAI, Claude, and other models to edit code in your local git repo.

  • ✓ Git-aware editing
  • ✓ Multi-file editing
  • ✓ Model agnostic
  • ✓ Voice coding
  • ✓ Image support

Free · 1 plan

Devin

Autonomous AI coding agent by Cognition. Handles full development tasks end-to-end with its own shell, browser, and editor. One subscription covers Devin and Devin Desktop, the IDE formerly known as Windsurf.

  • ✓ AI chat
  • ✓ Agentic mode
  • ✓ Multi-file editing
  • ✓ Terminal commands
  • ✓ Test generation

Free / $20/mo · 5 plans

Feature Aider Devin
Category CLIAgent
Starting Price Free Free
Model Family Multi-model (any)Proprietary
Documentation — ✓
Voice Input ✓ —
Git Integration — ✓
Open Source Yes (Apache 2.0)No

Pricing verified Jun 5, 2026. Aider pricing | Devin pricing

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Key Differences

  • Category: Aider is a CLI-based coding agent; Devin is an AI agent.
  • Starting price: Aider starts at free / BYOK; Devin starts at $20/mo.
  • Model family: Aider uses Multi-model (any); Devin uses Proprietary.
  • Open source: Aider: Yes (Apache 2.0). Devin: No.
  • Bring your own key: Aider supports BYOK; Devin does not.
  • Platform coverage: Devin adds Web; Aider adds macOS, Linux, Windows.

Which Should You Choose?

Choose Aider if you want a fully open-source tool with transparent development. Choose Devin if you want fully autonomous engineering tasks with minimal supervision. Read our full reviews to see which fits your workflow.

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