Verify Signup Emails in two minutes
The cleanest list is one that never lets a bad address in. Verifying email at signup — in real time, as the form submits — blocks invalid, disposable and mistyped addresses before they become a record, so your database stays clean at the source instead of needing a cleanup later.
What's hiding in your list
Without a real-time check, typos and fake addresses enter your database silently and only reveal themselves on the first send.
Disposable-email signups grab free trials and lead magnets, inflating your user count while never converting.
Cleaning bad data after the fact is always more expensive than blocking it at the form.
Email and phone — cleaned in one pass
Verify in one pass
Every email checked for deliverability and every phone validated — in a single upload.
Catch what others miss
Typos, catch-all domains, disposable addresses, dead numbers and silent duplicates.
Flat, simple pricing
Catch bad addresses before they enter your CRM. No per-credit math, no surprise overage bills.
Clean leads in three steps
No setup, no integrations, no learning curve. Upload a file, download a better one.
Upload your CSV
Drag in any contact list. We auto-detect email, phone, name and company columns.
We verify everything
Every email checked for deliverability, every phone validated, duplicates flagged — with a live quality score.
Download clean leads
Export a verified, deduplicated list your team can actually call and email.
Email and phone, cleaned in a single upload — see exactly how many bad contacts are hiding in your list before you pay a cent.
100 free verifications · no credit card · results in under 2 minutes
Frequently asked
How does real-time signup verification work?
Your form calls the BounceBlock API on submit; it returns a status in milliseconds so you can block or flag invalid, disposable and typo'd addresses before creating the account.
Will it slow down my signup form?
No — checks return fast enough to validate inline as the user submits, with a graceful fallback if the call is slow.
Can it verify phone at signup too?
Yes — the same call can validate a phone number and its line type, useful for flagging risky VoIP signups.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.