🤝 Free · no login · data stays in your browser

Deal Duplicate Detector: Merge the Same Startup from Multiple Sources

The same startup often reaches you through a referral, the website form and a demo day. Paste your list and the detector groups duplicates by website domain, phone, email or similar company name, shows why each match was made and exports one clean row per startup.

QUICK ANSWERDuplicates are matched on the same website or email domain (ignoring Gmail and other free providers), the same phone number, the same email, or company names that are about 85% similar after removing words like “Pvt Ltd” and “Technologies”. Each merged row lists every source the deal came from.

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What the Deal Duplicate Detector does

✅ Domain, phone, email and fuzzy-name matching
✅ Reason shown for every match
✅ Ignores free email domains
✅ Merged list with all sources
✅ CSV export

How to use the Deal Duplicate Detector

STEP 1
Paste your deal list
Name, website, email, phone and source columns from any sheet.
STEP 2
See duplicate groups
Matches on website domain, phone, email or similar name.
STEP 3
Review each group
The reason for every match is shown so you can confirm it.
STEP 4
Export the clean list
One row per startup with all sources combined.

Why duplicates matter in deal flow

Duplicates waste partner time, cause awkward double outreach to founders and distort source analytics. Knowing a startup reached you through three channels is itself a signal of momentum.

Run the detector before importing a batch into your CRM, and periodically on your whole pipeline.

Frequently asked questions

How does fuzzy name matching work?

Names are normalised (lowercase, common suffixes and punctuation removed) and compared with edit distance; 85%+ similarity counts as a match.

Why are Gmail addresses ignored for domain matching?

Because many unrelated founders share free email domains; only company domains are meaningful.

Is my list uploaded?

No. Matching runs in your browser.

Is this tool free? Do I need to sign up?

Yes. It is completely free, needs no login and has no usage limit. FastFee builds payment collection software; these startup and investor tools are free resources for founders, angels and fund managers.

Is my data private?

Yes. Everything you type stays in your own browser on this device (local storage). Nothing is uploaded to FastFee. Export or print a copy if you need to keep it.

Use it together with

Startup Auto-Tagger →Paste startup descriptions and get sector, business model, customer type, stage signal and city.Investor Deal Flow CRM & Pipeline Kanban →Track every inbound startup from any source on a kanban pipeline through IC to invested.

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