Tools · Comparison

Builder.io vs Hey, GitHub! vs Mails.ai

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

	Builder.io	Hey, GitHub!	Mails.ai
What it is	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.	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.
Category	Code Assistant	Code Assistant	Code Assistant
Pricing	Freemium · $24 - $40/mo	Paid	Freemium · $15 - $149/mo
How it bills	Flat monthly	Not published	Flat monthly
Free tier	Yes	No	Yes
Rating	Not yet rated	Not yet rated	Not yet rated
Features	—	—	—
What works	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	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
What does not	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 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

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