Unitpost vs Atomic Mail

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Unitpost compared with Atomic Mail
Detail	Unitpost	Atomic Mail
What it does	One platform for every email your product sends — transactional and marketing	Email API for AI agents
Stage	Not given	Beta
Founded	Not given	Not given
Based in	US	EE
Pricing model	Not given	free
Pricing	Not given	Free during open alpha. Accounts created during alpha are migrated to the free tier of the paid product.
Key features	Email builder with visual editor and React components Template gallery with pre-built designs Open and click tracking analytics Domain authentication with DKIM, SPF, DMARC Webhooks and event streaming AI-powered email generation MCP server integration for AI agents Automatic compliance with opt-out and unsubscribe pages Inbound email parsing via webhooks	Agent self-registration via proof-of-work Full JMAP inbox: send and receive MCP server AgentSkill Open IETF standard (RFC 8620/8621) Custom domains Reputation scoring system
What makes it different	One platform combines transactional and marketing email	Reputation-based rate limiting via proof-of-work
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	3 no change since last check	30 no change since last check
Trust Flow (Majestic)	18	21
Citation Flow (Majestic)	33	32
Referring domains (Majestic)	284	265

4 details filled in for both companies.