Free Duplicate Cleaning
Clean Up to 25,000 Contacts Free. No Subscription, Ever.
The duplicate scan is free at any size, and cleaning up to 25,000 contacts costs nothing. For a bigger file, one clear one-off you approve first.
We keep it free because no one should lose a deal to a duplicate they never saw.
Free duplicate scan, on every list
How many duplicates are hiding in your list?
Drop in a CRM export and Datuma counts the exact duplicate records, right here in your browser. Your file never leaves your machine, and nothing is uploaded.
Count your duplicates in seconds.
The in-browser counter needs JavaScript. With it on, you can drop a CRM export here and see your exact duplicate count without uploading anything. Or create a free account to run the full scan, which also finds the likely-duplicate matches under different spellings.
Start freeChoose a spreadsheet export or drag it here
Your file never leaves your browser. Nothing is uploaded.
Counting duplicates in your browser...
In your file
You have at least 0 exact duplicate records
Every duplicate is a record you would pay to enrich twice, and a person who gets mailed or called twice. Datuma collapses them so you only keep the people you actually have.
No exact duplicate records in this file
Nothing matched exactly across 0 rows. That is the easy half. The full scan also finds the likely-duplicate matches under different spellings, which exact matching walks straight past.
We could not find an email or LinkedIn column to match on
This quick count matches on email and LinkedIn. The full scan goes further, matching on names, organisations and more, so it catches duplicates this preview cannot.
We could not read that file
Export your contacts as a spreadsheet and try again. Nothing was uploaded, so you can drop another file straight away.
This quick count finds exact matches only. The full scan also finds likely-duplicate matches under different spellings. Your file never left your browser.
Signing up unlocks the full scan and your cleaned file. The scan is always free, at any size, and cleaning is free up to 25,000 contacts. No card to start.
The Duplicate Problem
Stop Hoping Your Database Is Clean
Almost nobody can say, hand on heart, that their contacts are free of duplicates. Most teams just hope they are.
of CRM admins say duplicate data is a problem they deal with
Validity, State of CRM Data Management 2024
of companies' data meets basic quality standards
Harvard Business Review, 2017
Being the exception is not complicated. Scan your database free to see exactly where you stand, clean it once, and join the few who have actually dealt with it instead of quietly hoping.
Why We Give It Away
Duplicates quietly rob the person who did the work.
A deal that closes under the wrong name
A candidate two consultants both called
A report nobody trusts
Cleaning that up should not be a luxury. For almost everyone, it is simply free.
The Right Person Gets the Credit
One record per person, so a deal lands with the rep who actually earned it.
Nobody Gets Double-Called
The same person stops being contacted twice by two people who never knew about each other.
Reporting You Can Trust
Counts and pipeline stop being quietly inflated by records for the same person.
We only charge a one-off on the very largest files, and that is what keeps the scan and everyday cleans free for everyone else.
How the Pricing Works
A One Off Clean, Not Another Subscription
Most duplicate cleaners bill you every month, on your total record count, and only run once they are plugged straight into your CRM. Cleaning a database is usually a one time job. So we price it like one.
Pay Once
One off, by the size of your file. Nothing recurring, nothing to cancel, and your first clean above 25,000 contacts is free.
No Connection Needed
A file goes in and a clean file comes back. Datuma never plugs into your CRM, so nothing in it moves without you.
Priced in Pounds
No credits, no per record metering, no surprise. You see the exact figure before you approve anything.
How It Works
Three Steps, From Messy Export to Clean File
The count above runs in your browser. Create a free account to run the full scan, then review each match and clean the file, all in your portal.
Scan, Free at Any Size
Export your contacts to a spreadsheet and upload the whole thing. Your file is processed in the EU and never used for anyone else. Datuma runs a full scan across the entire file and returns your exact duplicate count, the possible matches worth a look, and a sample. This part is always free, whatever the size.
Review and Decide
Exact duplicates, the same email or the same LinkedIn, are confirmed for you. Anything less certain comes back as possible matches to review, grouped so you can work through thousands quickly, each with a confidence score and the reason it matched. Your team picks merge or keep separate. Datuma never auto-merges.
Clean and Export
Download a cleaned, de-duplicated file you can use straight away, plus a list of the merge and delete actions behind it so you can apply them in your own system. Free up to 25,000 contacts. For a bigger file it is one off pricing, from £99, first clean free.
What lands back with you
cleaned_contacts.csv
19,206 kept · 1,204 duplicates removed
Illustrative. Every removal is listed with the record IDs, so you apply them in one bulk action.
You stay in control
You decide which record wins. We never overwrite without you
This is the review you get in your portal. Datuma finds the duplicates and shows them side by side, with the differences highlighted. You decide. Nothing changes in your CRM until you act on it.
The removed record appears in your CRM Actions file as a merge or delete recommendation.
The removed record appears in your CRM Actions file as a merge or delete recommendation.
The duplicate scan and review are always free, and cleaning is free up to 25,000 contacts. Your first 100 contacts are free too.
For a bigger file
From £99, priced by the size of your file
Finding your duplicates is free at any size. Cleaning and exporting is free up to 25,000 contacts. Above that it is a single one off price, paid once, never a monthly subscription. Your first clean above 25,000 contacts is free.
Up to 25,000 contacts
The always free clean. No card, no catch.
Free
25,000 to 100,000 contacts
One off.
£99
100,000 to 250,000 contacts
One off.
£199
250,000 to 1 million contacts
One off.
£399
Over 1 million contacts
We size it with you.
Let's talk
First clean free
One free paid export per account, so you can try it on real data.
No minimum
Pay the band your file falls in. Nothing more.
See it before you spend
The exact price shows on screen before you approve anything.
Priced in pounds, not credits. No VAT to add. 10% of everything you pay funds Camp Mohawk.
For Recruitment Agencies
Clean Up a Candidate Database That Has Grown for Years
The same candidate under three records congests search, throws off your reporting, and burns sourcing spend chasing people you already know. Export from Bullhorn, Vincere, JobAdder or whatever you run, upload the file, and get a de-duplicated file back to work from. No connection to your system, nothing merged without a consultant checking it.
Cleaner Search
One record per candidate, so a search returns the person, not three half-filled copies of them.
Honest Reporting
Counts and pipeline stop being inflated by duplicate candidate and client records.
Less Wasted Spend
Stop paying job boards and sourcing tools to re-find people already sitting in your database.
More Use Cases
Other Jobs This Is Built For
Merge Two Contact Lists
Two exports, an acquired book of business, a list from an event stacked on your database. Upload both and Datuma finds the same person across them, so you keep one clean record instead of two.
Clean a List Before You Import It
Catch the duplicates before they ever reach your CRM. Run the file through Datuma, review the matches, and import only what you want, so you never create two records for one person in the first place.
Tidy a Database Before You Enrich It
Deduplicate first, so when you do pay to enrich, you never spend on the same person twice. See how deduplication works or how contacts are scored.
Your Data, Handled Safely
Built to Be Trusted With Your Whole Database
Finds What Exact Matching Misses
Different spellings, different formatting, a personal email against a work one. Datuma matches across the whole file, so pairs that sat unnoticed for years surface with the evidence attached.
A Person Decides Every Close Call
Exact duplicates are confirmed for you. Everything else is a possible match to review, with a confidence score and the reason. Nothing is merged automatically.
Your Data Stays in the EU
Your file is processed in the EU and never used for anyone else. See our security and data handling.
Nothing Touches Your CRM
A file in, a clean file back. Datuma cannot change anything in your system. The actions list groups every merge so applying them is a bulk job, done when you are ready.
Large File Deduplication, Common Questions
How much does it cost to deduplicate a large contact list?
Do I need to connect my CRM?
What do I get back?
How much work is it to apply the changes to my own system?
Does Datuma merge the records for me?
Is the scan really free at any size?
How is this different from a monthly deduplication tool?
See Your Duplicate Count in Five Minutes
Upload your database and the scan is free, whatever the size. You only reach a price if you ask for the cleaned export on a file above 25,000 contacts.