vs
A closer look at
contact coverage.
We tested 1,500 randomly sampled Datasigma contacts against Apollo. Here are the results, the method, and the records behind them.
returned no match in Apollo
963 of 1,500 contacts searched by first name and company domain.
A snapshot of this lookup test, not proof that a contact is permanently absent from Apollo.
A test you could run yourself.
Random sample of 1,500 contacts
We drew 1,500 contacts at random from the Datasigma index — not hand-picked. They span 1,481 distinct companies (about one contact per company), so the result isn't skewed by a handful of accounts.
Looked each one up in Apollo
For every contact we queried Apollo's People Search API by first name + company domain — the same way a rep prospecting that person would. We recorded whether Apollo returned a matching person record.
Scored match vs. no-match
Matched = Apollo returned a person at that company for that name. No match = Apollo returned zero results. We did not count partial or wrong-person hits as matches.
Spot-checked the misses
We manually re-ran a random subset of the "no match" contacts by hand in Apollo's own UI to confirm they were genuine gaps — not query errors on our side. The reported rate describes the results of this test.
Found in Apollo isn't the same as usable in Apollo.
Of the 537 contacts Apollo did have, a large share were missing the details that make a contact actionable — no email or no direct dial on the record.
Coverage differs by seniority.
Breaking the same 1,500 lookups down by seniority shows a clear pattern — Apollo thins out fastest on the owners and founders who actually sign off on deals.
Built to be representative, not cherry-picked.
A random draw across markets, industries, and seniority — so the number reflects the database as a whole, not a favorable slice of it.
Explore all 1,500 records.
The complete dataset from the run — search, sort, and filter every contact we tested against Apollo's People Search API. First names and the company domain are shown; emails and direct dials are withheld. Results are as of August 2026.
| First name | Title | Company domain | Country | On Apollo? |
|---|
Emails and direct dial numbers are withheld here for privacy — they're available in-app. Every Datasigma record links back to the exact page it was found on, so you can confirm the person is real.
What this does — and doesn't — prove.
It's a sample, not a census. The 64.2% comes from a random draw of 1,500 contacts, so treat it as a close estimate of the true figure across the whole database — not an exact, fixed number.
Apollo's coverage varies. Results can differ by region, plan tier, filters, and over time. This is a snapshot of what Apollo returned at the time of testing (August 2026), not a permanent claim.
"No match" means no match on name + domain. A contact absent from Apollo may still exist on another platform. This test measures overlap with Apollo specifically — which is why it runs higher than our broader "on no other platform" figure.
You don't have to take our word for it. Every Datasigma contact links to the public page it was sourced from — so you can verify any record, and re-run this comparison against your own tools.
Run the same check on your list.
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