Tech Projects Workbench

CRM Dupe Remover

A Python prototype that finds and merges duplicate CRM records with fuzzy matching and domain logic, before they reach campaigns, dashboards, or sales workflows.

PrototypeData hygiene · Python · Zoho CRM

Problem

Managing CRM data at scale often results in duplicate leads, contacts, and accounts scattered across teams. This leads to inaccurate reporting, wasted sales effort, and poor customer experiences.

Without a reliable way to detect and merge duplicates, organizations face mounting data quality issues that erode trust in the CRM system.

Approach

  • Experimented with similarity scoring, email and domain matching, and merge rules.
  • Cleaned thousands of mock entries in sandbox tests as a proof of concept.
  • Became the reference model for what large-scale deduplication could look like in Zoho CRM.

Live demo

CRM de-dupe and merge demo Open in a new tab

Sample data

Try the demo with dummy data. Each set has 100 rows: 70 unique and 30 deliberate duplicates and typos.

Download all (ZIP)
Set Aleads.csv · contacts.csv · accounts.csv
Set B, extra noiseleads.csv · contacts.csv · accounts.csv