United States · Pre-seed startup

Who invested in Cotool

One round we have observed, with the one investor 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.

Cybersecurity

Funding summaryUpdated 26 Oct 2026

$500Kraised across 1 round since 2025, from 1 source

Latest round
Pre-seed, $500KJun 2025
Investors
1
See who backed them

The rounds

  1. Jun 2025
    Pre-seed$500K

    Source recorded

Everyone who backed them

Y CombinatorAccelerator1round

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

These 2 firms list Cotool as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

HomebrewVC firmPer its own site
515 VenturesVC firmPer its own site

Quick answers about Cotool

Who invested in Cotool?

Cotool's investors include Y Combinator.

How much has Cotool raised?

Cotool has raised $500K across 1 round since 2025.

When did Cotool last raise?

Cotool's most recent round was a Pre-seed of $500K in Jun 2025.

What was Cotool's biggest round?

Its most recent round, $500K in Jun 2025, is also its largest on record.

Who backed Cotool first?

Cotool's first round on record, in Jun 2025, was backed by Y Combinator.

What stage is Cotool at?

Cotool's latest named round is a Pre-seed, in Jun 2025.

Where is Cotool based?

Cotool is based in the United States.

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

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