Tools · Comparison

Mails.ai vs Refraction AI vs Sendmux

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

	Mails.ai	Refraction AI	Sendmux
What it is	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…	Sendmux is an email API that gives every AI agent a real inbox. Send and receive, route outbound through your own providers, and fail over automatically.
Category	Code Assistant	Code Assistant	Code Assistant
Pricing	Freemium · $15 - $149/mo	Paid · $8/mo	Freemium
How it bills	Flat monthly	Flat monthly	Not published
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 — $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	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	—