MXValidation vs Mails.ai

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

MXValidation compared with Mails.ai
Detail	MXValidation	Mails.ai
What it does	Free email deliverability testing and spam score checker	Email infrastructure for AI agents
Stage	Not given	Startup
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Not given
Pricing	Free account with 10 test emails per 24 hours; guests can access 3 tests per 24 hours	Free: 3,000 emails + 3,000 inbound replies/month; Pro: $20/month for 50K emails + 50K inbound replies; Scale: $99/month for 250K emails + 500K inbound replies. Yearly billing available: Pro $200/year, Scale $990/year (two months free).
Key features	Deliverability score out of 10	Per-agent email addresses on your domain Native prompt-injection scanning on every inbound Per-agent reputation graph Typed reply events without raw MIME parsing MCP-native distribution Self-serve signup with no sales call TypeScript and Python SDKs HMAC-signed webhooks with retries Per-agent allowlist and send limits DKIM signing on custom domains
What makes it different	Free service with no credit card required Tests real messages through your actual sending platform Provides practical, actionable recommendations	No approval queue—sending works immediately on signup Prompt-injection scanning built into every inbound message Per-agent reputation tracking so each agent is scored independently
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	29 no change since last check
Trust Flow (Majestic)	2	8
Citation Flow (Majestic)	10	36
Referring domains (Majestic)	11	406

4 details filled in for both companies.