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 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.
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.
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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