HubSpot Contact Data Cleanup Process

A repeatable process for cleaning and enriching the HubSpot contact database. Established during a sales standup between Mark Hope and Jacob Jones after identifying that the existing ~40,000-contact database was stale, poorly categorized, and missing key fields like industry.

Problem

Over time, contacts accumulated from various list imports without consistent enrichment or validation. Key issues identified:

• Missing industry data on a large portion of contacts
• Stale records — contacts imported years ago with no subsequent activity
• Unvalidated emails — high bounce risk on any outreach
• Miscategorized lifecycle stages — ~28,000 contacts sitting in "Lead" with insufficient data to qualify or disqualify them

Cleanup Process

Step 1 — Export

Export the full contact database from HubSpot. This gives a working dataset outside the CRM for bulk enrichment and validation without risking data integrity in the live system.

Step 2 — Enrich via Clay

Run the exported contacts through Clay to fill in missing fields:

• Industry
• Job title
• Company
• LinkedIn profile
• Phone number

Clay is also used for email validation on new contacts before they are ever imported into HubSpot.

Step 3 — Validate Emails via ZeroBounce

Run the full contact list (especially existing contacts not yet validated) through ZeroBounce to:

• Identify invalid, disposable, or high-risk email addresses
• Remove or flag records that would cause bounces
• Protect sender reputation before any outreach campaign

Division of tooling: Clay handles validation for new contacts at import time; ZeroBounce handles bulk validation of existing contacts during cleanup.

Step 4 — Reimport with Corrected Data

Reimport the enriched and validated dataset back into HubSpot with:

• Correct industry values populated
• Invalid contacts removed or flagged
• Lifecycle stages updated to reflect actual qualification status (see ^[1])

Handling the Existing Lead Backlog

The ~28,000 contacts currently in "Lead" status represent a specific cleanup challenge. The goal is to triage each segment:

• Promote to MQL or SQL if enrichment reveals sufficient data and qualification signals
• Remove if the contact is unvalidatable, irrelevant, or unrecoverable

Leaving 28,000 unqualified leads in the system creates noise and degrades the reliability of any funnel reporting.

Tooling Summary

Related

• ^[1]
• ^[2]