Atomic Mail vs EmailOctopus

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

Atomic Mail compared with EmailOctopus
Detail	Atomic Mail	EmailOctopus
What it does	Email API for AI agents	Email marketing made easy
Stage	Beta	Established
Founded	Not given	2015
Based in	EE	GB
Pricing model	free	freemium
Pricing	Free during open alpha. Accounts created during alpha are migrated to the free tier of the paid product.	Free plan for up to 2,500 subscribers. Paid Pro plan starts at $9 per month billed yearly for 10,000 subscribers. Plans scale with subscriber growth.
Key features	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	Drag-and-drop email editor Email templates Automation sequences Subscriber segmentation and tagging Scheduled campaigns Email personalisation Subscriber forms Analytics and reports API access Integrations
What makes it different	Reputation-based rate limiting via proof-of-work	Simplicity and ease of use Affordable pricing Fast customer support Nonprofit discount Email-only focus
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)	30 no change since last check	84 no change since last check
Trust Flow (Majestic)	21	46
Citation Flow (Majestic)	32	53
Referring domains (Majestic)	265	3337

7 details filled in for both companies.