Remove Duplicate Contacts in two minutes
Duplicate contacts are a silent budget leak: you pay to mail the same person twice, inflate your list metrics, and create confusing multi-touch attribution when the same lead shows engagement from two different records. In larger databases the problem compounds — a contact acquired through a webinar, re-entered through a purchased list, and then added again via a form fill can exist as three separate records with inconsistent phone numbers and slightly different company names. Deduplication requires more than string matching; it requires verifying which version of the record is actually current.
What's hiding in your list
Email addresses are the most reliable deduplication key, but they fail when a person has changed jobs and appears with both an old and new employer address.
Fuzzy-matching on name plus company introduces false positives — two different people named Sarah Chen at large enterprises like Salesforce or Microsoft are not the same contact.
Most marketing platforms deduplicate within their own database but do not check across integrated tools, so a contact can be unique inside the MAP while also existing in the CRM and a cold-outreach tool.
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 dupes even when formatting differs. 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
What is the safest field to use as a primary deduplication key?
A validated, lowercase email address is the most reliable single key — but verify it first, because two records pointing to the same invalid address are both candidates for removal anyway.
Should I merge duplicates automatically or review them manually?
Auto-merge on exact email matches is generally safe; for fuzzy matches on name and company, flag for manual review — the cost of a false-positive merge (losing a distinct contact) is usually higher than the cost of leaving a duplicate in place temporarily.
Does BounceBlock identify duplicates within an uploaded file?
Yes — as part of the cleaning pass it flags duplicate email addresses within the same upload and scores each, so you can choose which version of a duplicate record to retain based on data quality.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.