Aider vs Devin

A side-by-side comparison of Aider and Devin — pricing, free tiers, and who each tool is genuinely best for.

	Aider	Devin
Tagline	Open-source AI pair programmer in your terminal	Autonomous AI software engineer that ships PRs
Category	AI Coding	AI Coding
Pricing	Free and open-source; you pay only underlying LLM API costs — light use ~$5-20/mo, heavy use can reach $50-200+/mo	No permanent free tier; starts at ~$20/mo (pay-per-ACU); Team plan ~$500/mo; Enterprise custom — verify at devin.ai
Free tier
Best for	Terminal-native developers who want maximum model flexibility and full open-source transparency.	Engineering teams that want to delegate full end-to-end tasks — from issue to merged PR — without constant supervision.
Not for	Developers who prefer a GUI or managed IDE experience over a CLI workflow.	Developers who need deep IDE integration for line-by-line pair programming rather than delegated autonomous tasks.
Use cases	Multi-file refactoring from a prompt Bug fixes via natural language Adding features to existing codebases Automated git commits	Autonomous feature implementation Bug triage and repair Code migration and refactoring Writing and running tests
	Visit Aider	Visit Devin

Choose it if: Terminal-native developers who want maximum model flexibility and full open-source transparency.

Choose it if: Engineering teams that want to delegate full end-to-end tasks — from issue to merged PR — without constant supervision.