InfoSum is a UK-based data collaboration platform that enables companies to connect and analyze customer data across organizational boundaries without moving or sharing the underlying data. Its patented 'non-movement' technology powers decentralized data clean rooms used by advertisers, publishers, broadcasters, and brands for audience matching, measurement, and activation. Founded in 2015 by Nick Halstead (formerly of DataSift), InfoSum was acquired by WPP in April 2025 and integrated into GroupM (now WPP Media) as the foundational data layer of the WPP Open platform.
Infosum has been acquired
This company is no longer available on our private secondary market.
Company data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Founded
2015
Employees
51–200
Total Funding
$88.1M
4 rounds
Latest Valuation
$0.36B
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Total raised $88.1M across 4 rounds
Last updated 05-21-2026
| Date | Round | Amount Raised | Valuation | Lead Investors |
|---|---|---|---|---|
| Aug 17, 2021 | Series B TechCrunch | $65M | — | Chrysalis Investments |
| Sep 2020 | Series A | $15.1M | — | Upfront Ventures, IA Ventures |
| Sep 2017 | Seed | $5M | — |
Lauren Wetzel
CEO
Nick Halstead
Founder
Brian Lesser
Executive Chairman
Competitor list is illustrative and may be incomplete, stale, or erroneous.
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