Lead lists arrive from everywhere — form fills, purchased lists, event scans, and partner shares — and they overlap heavily. Importing duplicates inflates your database, double-counts conversions, wastes send credits, and gets the same prospect emailed by two campaigns. A disciplined dedupe pass before import keeps costs and metrics honest.
This workflow merges lead sources, removes duplicate emails and lines, and finds the overlap between lists so you know exactly what's net-new before anything hits your CRM or ESP.
The workflow
1
Merge all sources
Combine form fills, purchased lists, and event scans into one working list.
2
Remove duplicate emails
Strip exact duplicate addresses so each lead exists once.
3
Find the overlap
Compare against your existing database to see what's already known versus net-new.
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