Aider vs Devin
Pricing
Aider: Free (open source), you pay for API usage
Devin: From $500/mo
Description
Aider: Open-source terminal AI that edits your code and makes clean git commits automatically
Devin: Autonomous AI software engineer that takes tasks, writes code, runs tests, and submits PRs on its own
Pros
- Git-aware: every change is a well-described commit you can review or revert
- Works with Claude, OpenAI and DeepSeek models, plus local models
- Maps your whole codebase and can run linters and tests after each change
- Can work on tasks independently while you do other things
- Handles the full cycle: plan, code, test, debug, submit PR
- Learns your codebase conventions over time
Cons
- Terminal-only: no GUI, no visual diff preview
- API costs are yours to manage and can add up with large context
- Development has slowed: the latest release, v0.86.0, came out in August 2025
- $500/mo minimum makes this a serious commitment for a solo founder
- Results vary wildly: great for routine tasks, unpredictable for complex ones
- You still need to review its work carefully
Details
Aider is a terminal tool that pair-programs with you. You tell it what to change, it edits the files, and (here is the part that wins people over) it creates a clean git commit with a descriptive message. Every change is tracked, reviewable, and revertable. No other AI coding tool handles version control this naturally.
Built by Paul Gauthier, it builds a map of your whole repository so it can work on larger codebases. The tradeoff is that it is terminal-only and requires you to bring your own API key, and there is a learning curve to getting the most out of it (knowing which files to add, how to prompt). Development has also slowed: the latest release, v0.86.0, came out in August 2025, and the repository has had no new commits since May 2026, so support for newer models may lag. If you are already comfortable with git and the command line, aider fits into your workflow like a glove. If you want a visual editor experience, look at Cursor or Cline instead.
Devin works more independently than most AI coding tools. You assign it a task (“fix this bug,” “add this feature,” “set up CI/CD”) and it goes away, works on it, and comes back with a pull request. You do not sit and watch; it works asynchronously.
The $500/month price tag is steep for solo founders, and that is the honest reality. The people getting value from Devin are those with more tasks than time, who can keep it busy with well-defined work. If you have 3 bug fixes and 2 small features to ship this week and cannot hire a developer, Devin might pay for itself. If you are pre-revenue and watching every dollar, this is not where you start.
Aider verified
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