Bulk Email Checker 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.

Bulk Email Checker compared with Mails.ai
Detail	Bulk Email Checker	Mails.ai
What it does	Fast, accurate bulk email verifier and validator service that cleans lists and prevents bounces	Email infrastructure for AI agents
Stage	Established	Startup
Founded	2012	Not given
Based in	Not given	Not given
Pricing model	Paid	Not given
Pricing	Pay-as-you-go credits starting at $2.95 for 1,000 email validations, $9.95 for 10,000 emails, $74.95 for 100,000 emails, up to $4,975.95 for 25,000,000 emails. Free tier offers 10 free checks daily. Credits never expire and no monthly fees.	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	Real-time SMTP verification confirms mailbox existence with 99.7% accuracy Bulk CSV and text file upload for email verification Disposable email detection blocks temporary and burner addresses DNS and MX record validation to prevent hard bounces Automatic duplicate removal keeps lists unique Role account detection for generic B2B inboxes Syntax validation for RFC-compliant email format API integration with JSON and XML support for signup forms and CRM WordPress plugin for comment forms, registration and contact forms Google Sheets and Excel integration with IMPORTXML and WEBSERVICE functions	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	Pay-as-you-go pricing without monthly subscriptions or long-term contracts 99.7% accuracy through real-time SMTP verification rather than stale databases Significantly more affordable than competitors at 30-50% lower cost Enterprise-grade security with AES-256 encryption and SOC 2 Type II compliance 14 years in business since 2012 with 400,000+ customers worldwide	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)	50 +1 (up) since last check	29 no change since last check
Trust Flow (Majestic)	8	8
Citation Flow (Majestic)	35	36
Referring domains (Majestic)	158	406

5 details filled in for both companies.

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