Tools · Comparison

Hey, GitHub! vs Mails.ai vs Refraction AI

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

	Hey, GitHub!	Mails.ai	Refraction AI
What it is	A team of researchers and engineers at GitHub prototyping the tools, workflows, and ideas that will shape the future of software development.	Self-serve AI email API + MCP for agents. Per-agent addresses, per-agent reputation, native prompt-injection scanning on every inbound.	Refactor code, generate documentation, create unit tests and more. Simply paste a block of code, choose your language or framework, then hit "Generate" to…
Category	Code Assistant	Code Assistant	Code Assistant
Pricing	Paid	Freemium · $15 - $149/mo	Paid · $8/mo
How it bills	Not published	Flat monthly	Flat monthly
Free tier	No	Yes	No
Rating	Not yet rated	Not yet rated	Not yet rated
Features	—	—	—
What works	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 — $15 - $149/mo Sits in Code Assistant, one of the better-covered categories here — easy to compare	Publishes its price openly — $8/mo Sits in Code Assistant, one of the better-covered categories here — easy to compare
What does not	No free tier — it has to be paid for before it can be tried Does not publish a price on its own site, so the cost is only clear after signing up 97 other tools in this catalogue claim to do the same job 45 tools in the same category have a free tier	97 other tools in this catalogue claim to do the same job	No free tier — it has to be paid for before it can be tried 97 other tools in this catalogue claim to do the same job 45 tools in the same category have a free tier

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