Turn an ageing list back into one you can trust
Deduplication, correction, and pruning of ageing lists: dead domains, role changes, inconsistent formatting, and rows that no longer meet your criteria.
- Client-provided data
- Clay
- Apollo
- Public company information
Bramley & Co
Two duplicate records combined
Fenwick Logistics
Domain no longer resolves
Quayside Analytics
Contact has changed role
Harborline Systems
Name and casing standardised
What's included
Every project comes with
Duplicates merged with an audit trail
Duplicate records are combined, and the change log shows which rows were merged.
Invalid and outdated rows flagged
Dead domains, changed roles, and rows outside your criteria are marked for you to decide on.
Consistent formatting
Names, casing, and columns standardised so the list imports cleanly.
A summary of what changed
What we changed and why, so nothing disappears without explanation.
The deliverable
What we check
- Duplicate records
- Dead or changed domains
- Role and company changes
- Formatting and casing
- Rows outside your criteria
- Column structure for your CRM
How it runs
From brief to delivery
- 1
Send your list
Your export, along with anything it should be checked against.
- 2
Agree the rules
What counts as a duplicate, which rows to flag, and the format you want back.
- 3
Clean
Merge, correct, and flag, keeping a record of every change.
- 4
Deliver
The cleaned list plus a summary of what changed and why.
A good fit when
- Lists that have not been updated in months
- Merging lists from several sources or team members
- Preparing data before importing it into a new CRM or sequencer
Yes. We deduplicate against it, clean and correct it, and enrich the fields you're missing, flagging rows that no longer meet your criteria instead of silently keeping them.
Other services
Targeted B2B lists
A new list of companies and decision-makers built from scratch against your criteria. The project most clients start with.
Local business lists
Location-based research for field sales, partnerships, and local services, built where B2B databases are thin.
List enrichment
You have a list that is missing fields. We fill in what can be found and flag what cannot, rather than guessing.
Custom research
Criteria a database filter cannot express, scoped from a written brief and reviewed by hand on every row.
Agency fulfillment
Ongoing list-building behind your agency, delivered under your process and timelines. Your clients see your brand.
Combine services
Many projects mix two or three, such as a new list enriched with phone numbers.
Tell us who you need to reach.
Send a short brief. We'll come back with a scoped plan, a firm quote, and, if useful, a small sample before you commit.
- A reply, usually within one business day
- We come back with questions or a research plan.
- A written scope and a firm quote
- Criteria, sources, fields, timeline, and price are agreed before research starts.
- A small sample, if it helps
- Check the fit on a few rows before you commit to the full list.