Aider vs Devin
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Aider if you want open-source ai pair programming in your terminal, backed by git (Supervised agent, free); choose Devin if you want autonomous ai software engineer that takes delegated tickets to a reviewed pr (Supervised agent, usage).
| Aider | Devin | |
|---|---|---|
| What it is | Open-source AI pair programming in your terminal, backed by Git | Autonomous AI software engineer that takes delegated tickets to a reviewed PR |
| Type | agent | agent |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | free · Free (open source; pay your own model costs) | usage · $20/mo + usage (ACU credits) |
| Best for | developers | enterprise, mid-market, developers |
| Deployment | self-hosted | saas, api |
| Modalities | text, code | text, code, browser, api |
| Models | model-agnostic | claude, proprietary |
| Protocols | function-calling, rest-api | mcp, rest-api, function-calling |
| Integrations | Git, GitHub, OpenAI, Anthropic, Google Gemini, DeepSeek | GitHub, GitLab, Bitbucket, Slack, Microsoft Teams, Jira |
| Capabilities | 4 documented | 4 documented |
Aider
- +Fully open source (Apache-2.0) and free; you only pay your chosen model provider
- +Git-native: every AI change is a reviewable, revertible commit
- +Model-agnostic with a repo map that scales to larger codebases
- -Terminal-only with no GUI or IDE-native experience for those who want one
- -Runs locally and edits real files, so a human must review every change
Devin
- +Genuinely async, delegated model: handles whole tickets and large parallel migrations rather than line-by-line autocomplete
- +Deep workflow integration (Slack, Jira, Linear, GitHub) plus DeepWiki codebase indexing and a public API
- +Validated at large, complex enterprises
- -Best on clear, verifiable tasks; Cognition's own framing acknowledges it can make mistakes or get stuck on complex work and needs human review
- -Usage-based ACU billing can get expensive and unpredictable on open-ended work
Which should you choose?
Aider is open-source ai pair programming in your terminal, backed by git, best for developers. Devin is autonomous ai software engineer that takes delegated tickets to a reviewed pr, best for enterprise, mid-market, developers. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.
This comparison is generated from the sourced Aider and Devin profiles. Open either profile to review its evidence and last-reviewed date.