Signal AI Funding: $265M Raised, Growth (2025)

Signal AI is based in London, United Kingdom. It has raised $265M in total funding. Latest round: Growth. Backed by Battery Ventures, Aberdeen, Hearst.

Signal AI funding overview

Signal AI is based in London, United Kingdom. Signal AI has raised $265M in total disclosed funding. That places its disclosed total in the $250M–$1B range. Its most recent disclosed round is a Growth announced in September 2025. The round record for Signal AI runs through 2025; nothing later has been disclosed. Investors on record include Battery Ventures, Aberdeen, Hearst, Guardian Media Group Ventures. 4 distinct backers are named across the disclosed rounds.

Signal AI at a glance

Total raised
$265M
Latest round
Growth
Latest round date
September 2025
Headquarters
London, United Kingdom
Notable investors
Battery Ventures, Aberdeen, Hearst, Guardian Media Group Ventures

Frequently asked about Signal AI funding

How much has Signal AI raised?
Signal AI has raised $265M in total disclosed funding across the rounds on record.
Who has invested in Signal AI?
Battery Ventures, Aberdeen, Hearst, Guardian Media Group Ventures are named among the investors backing Signal AI.
What was the latest Signal AI funding round?
The most recent disclosed round is a Growth, announced in September 2025.
Where is Signal AI based?
Signal AI is based in London, United Kingdom.
When did Signal AI last raise?
The last disclosed Signal AI round closed in September 2025 at Growth.

Totals shown for Signal AI aggregate every disclosed round on file. To see how that compares, browse the companies in London and the investors behind them below.

Signal AI pitch deck

The investor deck Signal AI used to raise — 2013, Later Stage, 22-slide deck is broken down slide by slide, including the slides it leads with and the questions it leaves open.

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•By Alejandro Cremades