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Atomic Mail vs Contact.do

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 Contact.do
DetailAtomic MailContact.do
What it doesEmail API for AI agents Contact form in a link
StageBeta Established
FoundedNot given 2018
Based inEE Not given
Pricing modelfree Not given
PricingFree during open alpha. Accounts created during alpha are migrated to the free tier of the paid product. Free basic contact links; lifetime custom contact link for $19
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
  • Automatic email forwarding
  • Email privacy protection
  • Bot and spyware protection
  • Contact link statistics
  • Email unlinking option
What makes it different
  • Reputation-based rate limiting via proof-of-work
  • Share contact link instead of personal email
  • Protects email from bots and spyware
  • No extra email client configuration needed
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)30 no change since last check53 no change since last check
Trust Flow (Majestic)2130
Citation Flow (Majestic)3239
Referring domains (Majestic)265107

5 details filled in for both companies.

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