Keep Trial Signups Real. Improve Activation Rates.

Fake signups inflate your MRR metrics, waste sales bandwidth, and clog lifecycle email flows with undeliverable addresses. Verify emails at registration — automatically, in under 2 seconds.

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Everything you need to protect your signup flow

Stop fake accounts before they enter your system.

Signup Form Validation

Add a single API call to your registration flow. VeriMails returns a full verification result in under 2 seconds — invalid or disposable addresses are rejected before they touch your user database.

Disposable Email Blocking

Block temporary addresses from Mailinator, Guerrilla Mail, YOPmail, and hundreds of other throwaway providers. Ensure only users with permanent addresses can start trials.

Trial Abuse Prevention

Fraudulent signups often use disposable emails to claim multiple free trials. Blocking them protects your trial infrastructure and keeps your conversion metrics meaningful.

Lifecycle Email Accuracy

Onboarding sequences, feature announcements, and renewal reminders only work if they reach real inboxes. Verified addresses mean your lifecycle emails hit their mark.

Product Analytics Hygiene

Fake user accounts skew your activation rates, retention curves, and funnel metrics. Clean signups give you accurate data to make better product decisions.

Developer-Friendly API

One GET request. JSON response. Works with any stack. Add verification to your registration endpoint in under 15 minutes — no SDK required, just a standard HTTP client.

How it works in your registration flow

Three steps from zero to a clean user database.

Add verification to registration

Call the VeriMails API when a user submits your signup form. Check the status field — if invalid or disposable, return an error before creating the account.

Let real users through instantly

Valid addresses proceed through registration without any friction. The entire verification call happens in under 2 seconds — invisible to legitimate users.

Watch your metrics improve

With fake accounts filtered out, your activation rate, trial-to-paid conversion, and lifecycle email deliverability all improve from day one.

40%

Reduction in Fake Signups

30%

Improvement in Trial-to-Paid Conversion

99.2%

Verification Accuracy

Sub-2s

Registration Flow Latency

“We were seeing 20%+ of trial signups from disposable emails — all dead ends. After adding VeriMails to registration, our trial-to-activated rate jumped 35% because we were only counting real users.”

Daniel L. — Co-founder at Project Management SaaS, Canada

Frequently asked questions

No. The VeriMails API responds in under 2 seconds per address, which is imperceptible in a registration flow. Most users never notice.

Block them. Disposable addresses provide no lifecycle email value, can’t reset passwords reliably, and are commonly used for trial abuse. Hard blocking is standard practice for SaaS.

Add a single API call to your registration handler before creating the user record. Check the status field — if it returns “invalid” or “disposable”, return an error response. Takes 15 minutes to implement.

VeriMails uses SMTP verification against the actual mail server — not a blocklist. Unusual but valid email providers pass verification cleanly. Only genuinely invalid or disposable addresses are flagged.

Start verifying emails today

100 free credits. No credit card required.

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