Arthur Querou
About Arthur Querou
Arthur Querou is a computer scientist turned adtech entrepreneur based in Paris. In 2013 he created MotionLead, which built playable ad units for mobile and was acquired by Adikteev. Crunchbase lists him as Chief Mobile Officer and co-founder there.
In 2017 he founded Keymantics (listed on Crunchbase as KMTX), a performance keyword targeting product that was later acquired by Seedtag. His Medium profile describes him as having founded three companies, two of them acquired and one still running.
He is now co-founder and CEO of Vibe.co, a self-serve streaming and connected TV ad platform. A 2024 conference biography said the company had raised over $30M and had more than 4,000 clients. In a 2026 VideoWeek podcast he discussed Vibe moving from small and mid-sized advertisers toward larger brands.
Crunchbase lists two personal investments for Arthur Querou. The most recent is the Concord seed round announced in June 2026. The other is Actionable's seed round in September 2024, where CB Insights and Crunchbase list him among the co-investors. Round sizes for his own checks are not public.
Concord is an agentic media buying platform. <br>Its seed round was $3M, announced in June 2026. A16Z Scout, Drysdale, Motier Ventures and Better Angle backed it, along with industry angels. Pulse 2.0 names Arthur Querou of Vibe.co among those angels, alongside Rémi Lemonnier of Scibids AI, Philippe Corrot of Mirakl and Thomas Zaepffel of Adot.
His operating work at Vibe.co also uses AI. In an ITVT interview he described the platform as using data-driven targeting and generative AI for connected TV ads.
The public record shows seed-stage angel investments in companies close to his own field of media and adtech, including the AI-driven Concord. Both known investments are in French or Paris-linked companies. He has not published a check size, a stated investment thesis or a fund size that we could find, so none is given here.
- Concord: agentic media buying platform that turns campaign briefs into live campaigns across platforms such as DV360, Meta and The Trade Desk. He took part in its $3M seed round in June 2026.
- Actionable: he is listed as a co-investor in its seed round in September 2024. We did not find a verified description of what the company does.
- crunchbase.com/person/arthur-querou
- newyork2024.advertisingweek.com/aw/schedule/speaker/-11537
- medium.com/@arthurquerou/about
- pulse2.com/concord-raises-3-million-seed-funding-to-build-agentic-medi
- app.dealroom.co/news/feed/concord-raises-3m-for-agentic-media-buying-p
- cbinsights.com/investor/stephane-distinguin
- itvt.com/televisionation/televisionation-vibe-co-ceo-arthur-querou-on-
- videoweek.com/2026/01/29/videoweek-podcast-55-arthur-querou-vibe-co
Investing activity
Arthur Querou appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $3M. The most recent is Concord (Seed, $3M, Jun 2026).
Arthur Querou most often invests alongside Motier Ventures, Drysdale Ventures, a16z Scout Fund and Better Angle, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Arthur Querou
Who is Arthur Querou?
Arthur Querou is a Paris-based adtech entrepreneur and the co-founder and CEO of Vibe.co, a connected TV ad platform. He previously founded MotionLead and Keymantics, and he also invests as an angel.
Has Arthur Querou invested in AI startups?
Yes. He was one of the angels in Concord's $3M seed round in June 2026. Concord builds an agentic media buying platform.
What is Arthur Querou's angel check size?
He has not published a check size, and we did not find one in public sources. Ask him directly rather than assuming a figure.
What stage does Arthur Querou invest in?
His two investments listed on Crunchbase are both seed rounds, Actionable in 2024 and Concord in 2026. He has not published a stage policy.
What companies has Arthur Querou founded?
He founded MotionLead in 2013 and Keymantics in 2017, and he co-founded Vibe.co. His Medium profile says two of his three companies were acquired.
Should I pitch Arthur Querou if I am not in adtech?
His public investments and operating experience are in media and adtech. Founders in that area, especially AI products for advertising, have the clearest overlap. He has not said publicly whether he backs other sectors.
Is Arthur Querou an angel investor?
Yes. Arthur Querou invests personally as an angel.
What AI companies has Arthur Querou invested in?
Arthur Querou's AI investments include Concord. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Arthur Querou invest at?
In the rounds tracked on Lounge, Arthur Querou has invested at Seed, with a median round of $3M.
Who does Arthur Querou co-invest with?
Arthur Querou's most frequent co-investors on Lounge are Motier Ventures (1 deal), Drysdale Ventures (1 deal), a16z Scout Fund (1 deal), Better Angle (1 deal) and Philippe Corrot (1 deal).