Who invested in Signal AI

2 rounds we have observed, with the 7 investors named in them. 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

$215Mraised across 2 rounds since 2021, from 2 sources

Latest round: Series D, $50MDec 2021
Biggest round: $165MGrowth
Investors: 7 (1 led)

See who backed them

Signal AIAI1 / 16Their pitch deckSignal AI's pitch deck, 16 slidesEach slide read for what it argues, against the decks that raised at the same stage.

The rounds

Dec 2021
Series D$50M
Source recorded
Date not reported
Growth$165M
Reported by Firms' own news pages

Founders and team

From Signal AI's own website: 1 founder, 3 on the team.

David BenigsonCEO & Founder

Karlie SantucciChief Customer Officer
Stephen LucasChief Operating Officer
Thor MitchellChief Product & Technology Officer

Everyone who backed them

MMC VenturesVC firm2rounds

Highland EuropeVC firm2rounds

Battery VenturesVC firm1round, led 1

LocalGlobeVC firm1round

Frontline VenturesVC firm1round

Mercuri VCVC firm1round

VolutionVC firm1round

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

Also claim to have backed them

This firm lists Signal AI 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.