Aider vs Devin
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Open source
An open-source terminal pair programmer that edits code in your local Git repo and commits changes.
AI tool · Paid
Cognition's autonomous software engineering agent that takes tasks from Slack or tickets and delivers pull requests.
The short answer
Choose Aider if you need…
- Git-centric terminal workflows
- Using any model with your own key
Choose Devin if you need…
- Delegating backlog tickets
- Teams experimenting with agent engineers
Side-by-side
| Aider | Devin | |
|---|---|---|
| Type | Coding · Coding agents | Coding · Coding agents |
| Price | Open source | Paid |
| Platforms | CLI, macOS, Windows, Linux | Web |
| Works with | GitHub | Slack, GitHub, Jira |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
Aider
An open-source terminal pair programmer that edits code in your local Git repo and commits changes. Lean and effective. Terminal-only, which not everyone enjoys.
Devin
Cognition's autonomous software engineering agent that takes tasks from Slack or tickets and delivers pull requests. Handles routine tickets well. Unclear tasks lead to wasted runs, so scope work tightly.
Best for
Aider
- Git-centric terminal workflows
- Using any model with your own key
Devin
- Delegating backlog tickets
- Teams experimenting with agent engineers
Strengths
Aider
- Edits with automatic Git commits
- Repository map
- Works with many models
- Voice coding
Devin
- Cloud workspace with browser and shell
- Slack and Jira task intake
- Pull requests
- Devin Desktop editor (formerly Windsurf)
Frequently asked questions
What is the difference between Aider and Devin?
Aider: An open-source terminal pair programmer that edits code in your local Git repo and commits changes. Devin: Cognition's autonomous software engineering agent that takes tasks from Slack or tickets and delivers pull requests. Aider suits git-centric terminal workflows, while Devin suits delegating backlog tickets.
Are Aider and Devin free?
Aider: Open source. Devin: Paid.
What are other alternatives to Aider and Devin?
Other options people compare them with include Claude Code, Gemini CLI, OpenAI Codex, Amp, Cline.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.