Aider vs Devin

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

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
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Devin

🔴Developer

AI Coding

Devin is an autonomous AI software engineer from Cognition that plans, writes, and ships code from a single prompt, running long-horizon engineering work in a cloud sandbox.

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Starting Price

$500/mo
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Feature Comparison

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FeatureAiderDevin
CategoryAI Coding AssistantAI Coding
Pricing Plans14 tiers122 tiers
Starting PriceFree$500/mo
Key Features
  • • Terminal-based AI pair programming
  • • Direct file editing with Git auto-commits
  • • Multi-model support (Claude, GPT-4o, DeepSeek, local)
  • • Cloud AI software engineering agent
  • • Plans, codes, tests, and opens pull requests
  • • Parallel task execution for migrations and refactors

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

Devin - Pros & Cons

Pros

  • ✓Genuine autonomy: plans, codes, runs, and tests without constant prompting
  • ✓Parallel cloud agents let one engineer drive several tickets at once
  • ✓Devin Desktop (Windsurf) bundle gives you an IDE and the autonomous agent on one plan
  • ✓Pro tier at $20/month is competitive with single-seat Copilot/Cursor pricing
  • ✓Live session review preserves human-in-the-loop oversight

Cons

  • ✗Best on repos with strong test suites; weaker when feedback signals are missing
  • ✗Long-horizon tasks can burn quota quickly; Max tier exists for a reason
  • ✗Cloud sandbox means sensitive monorepos need careful access review
  • ✗Quality varies on greenfield or product-judgment-heavy work
  • ✗Teams plan adds $40/seat on top of base, which scales fast for large squads

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🔒 Security & Compliance Comparison

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Security FeatureAiderDevin
SOC2—✅ Yes
GDPR——
HIPAA——
SSO—✅ Yes
Self-Hosted—❌ No
On-Prem—❌ No
RBAC—✅ Yes
Audit Log——
Open Source—❌ No
API Key Auth—✅ Yes
Encryption at Rest—✅ Yes
Encryption in Transit—✅ Yes
Data Residency——
Data Retention——
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