Verify a HubSpot List in two minutes
HubSpot contacts decay quietly between syncs, and a bounce-heavy send from your connected inbox can drag down the deliverability of every workflow you run. Exporting, verifying, and re-importing keeps your HubSpot lists deliverable without touching the automation you've already built.
What's hiding in your list
HubSpot marks contacts as bounced only after the damage is done, so invalid addresses sit in active lists until a send exposes them.
Form submissions and imports add new contacts continuously, so a list that was clean last month quietly fills with typos and disposables.
Workflows fire automatically against list membership, meaning one bad import can trigger bounces across several sequences at once.
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
Export, verify and re-import a clean HubSpot list. 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 do I verify a HubSpot list?
Export the contacts as a CSV from HubSpot, run them through BounceBlock, then re-import the clean file or suppress the invalid records.
Will this create duplicate contacts in HubSpot?
No — you re-import against the existing records or simply suppress the bad ones; we also dedupe within your file first.
Can I verify HubSpot form submissions in real time?
Yes — the API can validate each submission before it becomes a HubSpot contact, so bad data never lands.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.