# Polygraf funding: rounds and investors

> Polygraf has raised $9.5M across 1 round since 2025. Investors include Alumni Ventures, Gaingels and Sputnik ATX. Every round with its source.

Source: https://millionrounds.com/company/polygraf (Millionrounds; every figure on the page links to its filing or article)

United States · [Seed startup](https://millionrounds.com/companies)

# 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.

AI

Funding summary Updated 26 Oct 2026

**$9.5M** raised across 1 round since 2025, from 1 source

- **Latest round:** Seed, $9.5M Oct 2025
- **Investors:** 3

See who backed them

## The rounds

- **Oct 2025** Seed **$9.5M** [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Gaingels](https://millionrounds.com/fund/gaingels) [Sputnik ATX](https://millionrounds.com/fund/sputnik-atx) Source recorded SEC filing: $9.0M sold, first sale Sept 2025

## Everyone who backed them

[Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) VC firm **1** round

[Gaingels](https://millionrounds.com/fund/gaingels) Private equity **1** round

[Sputnik ATX](https://millionrounds.com/fund/sputnik-atx) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=polygraf).

## 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.

[Machina Ventures](https://millionrounds.com/fund/machina-ventures) VC firm Per its own site

## Quick answers about Polygraf

### Who invested in Polygraf?

Polygraf's investors include Alumni Ventures, Gaingels and Sputnik ATX.

### 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.

## Companies like Polygraf

In the same sector, and raised in the last eighteen months.

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