I was paying $48/month for email validation with half the features locked. So I built MailSentry — fast, honest, and every feature on every plan.
I was building a SaaS and watched a huge chunk of my signups come from disposable emails. Every "user" was a ghost. My onboarding metrics were fiction. My welcome emails bounced. I was paying to acquire users who didn't exist.
I tried the big email validation providers — ZeroBounce, NeverBounce, Kickbox. They wanted $48/month for 10K checks, and half the features were locked behind premium tiers. The first month was always 90% off, then the real price kicked in. It felt dishonest.
So I built what I needed: a fast, honest API that gives you every validation layer on every plan. No first-month bait, no locked features, no enterprise sales calls just to get basic functionality.
MailSentry is the email validation API I wished existed. Now it does.
Building a SaaS, watching ghost signups pile up. Tried the big validation providers — $48/month for basic checks, half the features locked behind premium tiers.
Started building MailSentry from scratch. Goal: every validation layer on every plan, sub-50ms response, and pricing that doesn't insult your intelligence.
Shipped the API with 8 validation layers, honest pricing, and a free tier that actually lets you test. No first-month bait, no locked features.
Launched bulk email validation, email finder, and exportable reports — all included on every plan, including Free. No premium gates, no add-on fees.
Pay-as-you-go credits, SDKs for popular frameworks, and more integrations. Built by developers, for developers.
Sub-50ms responses. Fast enough for real-time form validation without your users noticing a thing.
No first-month bait pricing. No features locked behind premium tiers. What you see is what you pay. Period.
8 validation layers, bulk validation, email finder, and exportable reports on every plan. No features locked behind premium tiers.
Building MailSentry as an indie project. Shipping fast, listening to users, and proving that a solo developer can build something better than a 50-person company. More team members coming soon.
Get your free API key in 30 seconds. 1,000 checks/month included. No credit card, no commitment.