Funded Advertising Startups in London
London's advertising sector has produced a wide spread of venture rounds across the 50 entries shown, ranging from a $700K angel into Octaive (October 2021…
London's advertising sector has produced a wide spread of venture rounds across the 50 entries shown, ranging from a $700K angel into Octaive (October 2021) to Zilch's $177M venture round closed in November 2025. The largest disclosed raise belongs to Kape Technologies at $217M via Post-IPO Equity in September 2022, followed by GWI's $180M Series B in February 2022. Seed and Series A rounds dominate by count — companies including RECRD, Gener8 Ads, NumberEight, and Odore closed seed rounds between 2023 and 2024, while Duel, Evidently, and Threedium anchored Series A activity in the same window.
Subsectors represented span identity and data infrastructure (ID5, Permutive, NumberEight), in-game and in-app advertising (Admix, Bidstack, AudioMob), creator and influencer monetization (Whalar, Duel, Tailify), and attention-based or contextual targeting (Illuma, Good-Loop, The Attention Exchange). Three publicly listed companies — Bidstack, Kape Technologies, and Silverbullet — also appear, each having raised Post-IPO Equity rounds clustered in the second half of 2022.
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Frequently asked
What are the largest disclosed rounds among London advertising startups in this dataset?
Kape Technologies leads at $217M via Post-IPO Equity (September 2022), followed by GWI's $180M Series B (February 2022) and Zilch's $177M venture round (November 2025). Anton's $109M Series Unknown raise (May 2024) and Permutive's $75M Series C (November 2021) round out the top five disclosed amounts.
Which round stages appear most often across these London advertising companies?
Seed and Series A rounds account for the largest share of entries by count. Series Unknown rounds are also common — Rezolve, Anton, Precise TV, and several others disclosed a raise without specifying the exact stage, which compresses the visible stage distribution.
Are there publicly traded advertising companies in this set still raising capital?
Three companies raised Post-IPO Equity rounds: Bidstack ($11M, October 2022), Kape Technologies ($217M, September 2022), and Silverbullet ($3M, June 2022) — all within the same four-month window in the second half of 2022.
What advertising subsectors are most represented among the funded companies shown?
Identity and data infrastructure clusters around ID5 (Series B, $20M), Permutive (Series C, $75M), and NumberEight (Seed, $3M). In-game and in-app advertising is covered by Admix, Bidstack, and AudioMob. Creator and influencer monetization appears through Whalar, Duel, and Tailify, while attention-based and contextual targeting is represented by Illuma, Good-Loop, and The Attention Exchange.
How recent is the funding activity shown, and which deals closed latest?
The most recent entry is Zilch's $177M venture round, dated November 16, 2025. Duel's $16M Series A (September 24, 2025) and Rezolve's $50M Series Unknown (July 24, 2025) are the next most recent, with all three closing in the second half of 2025.
Is all the data in this listing from London, England specifically?
One entry — Locorum, which raised a $1M Pre-Seed round in May 2023 — is headquartered in London, Ontario, Canada. The remaining 49 companies are based in London, England, United Kingdom.
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