GrowSurf 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.

GrowSurf compared with Atomic Mail
Detail	GrowSurf	Atomic Mail
What it does	Referral program software that turns your customers into your lowest-cost growth channel	Email API for AI agents
Stage	Established	Beta
Founded	Not given	Not given
Based in	US	EE
Pricing model	subscription	free
Pricing	Referral programs: Startup plan $125/mo billed yearly (or $179/mo monthly) for up to 2,500 participants; Business plan $314/mo billed yearly (or $449/mo monthly) for up to 10,000 participants. Affiliate programs: Free plan at $0/mo plus 3% success fee on referral revenue. All plans include 14-day fr	Free during open alpha. Accounts created during alpha are migrated to the free tier of the paid product.
Key features	Automatic link generator Copy and paste integration Fast setup time Fully white-labeled AI-powered optimization Automatic rewards Flexible reward types REST API and SDKs Analytics dashboard	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	Launch in days, not weeks without heavy engineering Pricing based on participants, not total user base Trusted by healthcare, fintech, and software teams 312% average return on investment	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)	74 no change since last check	30 no change since last check
Trust Flow (Majestic)	27	21
Citation Flow (Majestic)	35	32
Referring domains (Majestic)	1525	265

7 details filled in for both companies.

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