United States · 
Who invested in Polygraf?
Polygraf's investors include Alumni Ventures, Gaingels and Sputnik ATX.
United States · Seed startup
Who invested in Polygraf
One round we have observed, with the 3 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Funding summaryUpdated 26 Oct 2026
$9.5Mraised across 1 round since 2025, from 1 source
- Latest round
- Seed, $9.5MOct 2025
- Investors
- 3
The rounds
- Oct 2025Seed$9.5M
Source recordedSEC filing: $9.0M sold, first sale Sept 2025
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists Polygraf as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Polygraf
How much has Polygraf raised?
Polygraf has raised $9.5M across 1 round since 2025.
When did Polygraf last raise?
Polygraf's most recent round was a Seed of $9.5M in Oct 2025.
What was Polygraf's biggest round?
Its most recent round, $9.5M in Oct 2025, is also its largest on record.
Who backed Polygraf first?
Polygraf's first round on record, in Oct 2025, was backed by Alumni Ventures, Gaingels and Sputnik ATX.
What stage is Polygraf at?
Polygraf's latest named round is a Seed, in Oct 2025.
Where is Polygraf based?
Polygraf is based in the United States.
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