Tools · Comparison

Aider vs Builder.io vs Refact AI

All three are code assistant tools. Here is what separates them.

	Aider	Builder.io	Refact AI
What it is	An open-source pair programmer in the terminal that edits your files and commits each change to git.	One codebase for engineers, designers, PMs, and marketers. Everyone works from one source of truth, on brand and in code, with no handoffs to clean up.	AI Agent for Coding - Refact.ai adapts to your workflow, automating coding, debugging, and testing with full context awareness. An open-source alternative to…
Category	Code Assistant	Code Assistant	Code Assistant
Pricing	Free · Free · model API costs apply	Freemium · $24 - $40/mo	Paid · $10/mo
How it bills	Free	Flat monthly	Flat monthly
Free tier	Yes	Yes	No
Rating	Not yet rated	Not yet rated	Not yet rated
Features	Every edit becomes a git commit Repository map for context selection Works with most model APIs Voice input Runs and reads test output	—	—
What works	Undo is just git revert No subscription beyond model costs Editor-agnostic	Has a free tier, so it can be tried before paying Publishes its price openly — $24 - $40/mo Sits in Code Assistant, one of the better-covered categories here — easy to compare	Has a free tier, so it can be tried before paying Publishes its price openly — $10/mo Sits in Code Assistant, one of the better-covered categories here — easy to compare
What does not	Terminal-only, no GUI You manage the API keys and costs Steeper start than an editor plugin	97 other tools in this catalogue claim to do the same job	97 other tools in this catalogue claim to do the same job