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Mailguard
Email verification API with a free tier, up to 100x cheaper
MailGuard is an email verification API for developers. One call checks syntax, MX records, disposable and role addresses, suggests typo fixes, and returns a 0-100 deliverability score. Free tier (500/mo, no card), and up to 100x cheaper than the incumbents.
Hey Product Hunt 👋
I'm Anthony, and I built MailGuard, an email verification API for developers.
Every signup form quietly collects bad emails: typos like gmial.com, throwaway inboxes, and dead domains. They inflate your bounce rate and hurt your sender reputation. MailGuard catches them in one call.
Send an email, get back:
✅ syntax + live MX (mail server) checks
✅ disposable / throwaway detection
✅ role-account flags (info@, admin@)
✅ "did you mean gmail.com?" typo suggestions
✅ a 0-100 deliverability score
What makes it different:
🔹 A genuinely free tier: 500 checks a month, no card.
🔹 Up to 100x cheaper than the established providers, because it runs on Cloudflare Workers with no database, so my costs are tiny and I pass the savings on.
🔹 Privacy-first: it doesn't store the emails you verify.
🔹 Works with any stack (plain REST), plus a zero-dependency npm SDK.
You can try it right now with no signup on the free email checker, or grab a key and drop it into your signup flow in minutes.
Honest note: it does syntax + MX + heuristics, not live SMTP mailbox probing. That keeps it fast and cheap, and it's the right level for stopping junk at signup.
I'd love your feedback, especially on the accuracy and the scoring. Happy to answer anything 🙏
About Mailguard on Product Hunt
“Email verification API with a free tier, up to 100x cheaper”
Mailguard was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #155 on the daily leaderboard. MailGuard is an email verification API for developers. One call checks syntax, MX records, disposable and role addresses, suggests typo fixes, and returns a 0-100 deliverability score. Free tier (500/mo, no card), and up to 100x cheaper than the incumbents.
On the analytics side, Mailguard competes within API, SaaS and Developer Tools — topics that collectively have 656.8k followers on Product Hunt. The dashboard above tracks how Mailguard performed against the three products that launched closest to it on the same day.
Who hunted Mailguard?
Mailguard was hunted by Anthony Hughes. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Mailguard including community comment highlights and product details, visit the product overview.
Anthony Hughes