Verify email and phone in one upload
Most verification tools stop at email. BounceBlock validates both — deliverability on every address and line type on every number — then removes duplicates, so one clean file covers your whole outreach. Preview your first 100 rows free, no credit card.
Why verify email and phone together
A contact record is only as good as its weakest field. If the email is dead but the phone is fine, an email-only verifier calls the record clean and your rep still wastes the outreach. If the phone is a disconnected VoIP line but the email verifies, a phone-only tool misses it. The people you're trying to reach live at the intersection of both channels, and so do the bad records.
Verifying email and phone in the same pass closes that gap. You find the records where both channels are dead — the ones that are simply bad data, not hard-to-reach leads — and you learn, per contact, exactly how to reach the rest: email the confirmed inboxes, text the mobiles, call the landlines. One upload, one clean file, one source of truth for your whole outreach motion.
It's also just less work. Instead of running a list through an email verifier, exporting, then running it through a separate phone tool and reconciling two files, you upload once and get a single verified, deduplicated result back.
What we check on every email
What we check on every phone
Deduplication across both fields
The same person often lands in a list more than once — entered twice, imported from two sources, or captured with a different email one time and a different phone the next. A verifier that only looks at the email column misses the duplicate that shares a phone number, and vice versa.
BounceBlock deduplicates across both email and phone, normalising formatting and casing first, so a contact who appears as "Jane Doe / jane@co.com" in one row and "J. Doe / +1 415…" in another collapses to a single clean record. You stop paying to reach one person twice, and your list count finally reflects real, unique people.
The gap email-only tools leave open
Almost every verification tool in the category is email-only. That was fine when outreach meant email and nothing else — but the moment your team calls or texts, an email-only verifier has checked only half of each contact record and declared the job done. The phone half sits unverified, and a disconnected number wastes a rep's time exactly the way a bounced email wastes a send.
The usual workaround is to bolt a separate phone-validation tool onto an email verifier, export between them, and reconcile two files where "verified" means two different things. That's slower, more expensive, and error-prone — the reconciliation step is where records get mismatched and duplicates slip through. Verifying both in one pass, on one engine, is what makes a contact record trustworthy across every channel at once.
This is the wedge behind BounceBlock: not a marginally better email check, but the whole contact — email, phone, and de-duplication — cleaned together, at one flat price, in a single upload.
Who it's for
How it works
Upload a CSV from any source — CRM export, event scan, purchased list — and BounceBlock auto-detects the email, phone and name columns. There's no template to match and no onboarding call.
We verify every email and validate every phone in the same pass, remove duplicates across both fields, and score each row so you can see the health of the whole list at a glance. Your first 100 rows preview free, so you see exactly how many bad contacts are hiding before you pay.
Unlock the full result and download a clean, deduplicated file — ready to import back into your CRM or drop straight into your sending tool.
Flat pricing, not credits
Credit-metered tools make you ration verification — and charge you twice when a contact has both an email and a phone to check. BounceBlock is a flat monthly price with a generous allowance, so you can verify email and phone before every send instead of watching a credit balance. Clean lists are supposed to be a habit, not a budget decision.
Ready to see what’s hiding in your list?
Upload a file and preview your first 100 verifications free — email and phone, in one pass.
Frequently asked
Do you really verify email and phone in the same upload?
Yes. One CSV in, one clean file out — every email checked for deliverability and every phone validated for line type and status, with duplicates removed across both. You don't run two tools or reconcile two exports.
What does it cost to verify both?
It's included in one flat monthly price. Unlike credit-based tools, you're not charged separately per email and per phone — verifying both fields on a contact is part of the same pass.
Can I preview before paying?
Yes. Upload a list and preview your first 100 rows free — no credit card. You'll see how many bad emails, dead numbers and duplicates are hiding before you unlock the full clean file.
Which phone line types can you detect?
Mobile, landline and VoIP, plus active-status and carrier signals where available — so you know whether to text, call, or take a closer look at a number.
How does deduplication work across email and phone?
We normalise formatting and casing, then remove records that duplicate across the email or phone field, so the same person entered two different ways collapses to a single clean record.
What formats can I upload?
Any CSV. We auto-detect the email, phone and name columns, so a raw export from your CRM, an event scan, or a purchased list all work without reformatting.
Is my data safe?
Your file is encrypted, processed, and deleted on a fixed retention schedule. Verification is the only thing we ever do with your contacts — we never sell or share them.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.