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Companies

Symitri

Privacy cleanroom for first-party ad targeting

Raised to date

$365K

across 1 Form D filing

Investors
4
Last filed
Jun 9, 2026

About

Symitri, Inc. builds an integrated privacy firewall and real-time data cleanroom for open-web advertising. Its PRISM AI platform lets advertisers and publishers match and activate their own first-party data for deterministic targeting, measurement and attribution without exposing personal or pseudonymous identifiers in the programmatic bidstream. The company raised a $5M seed round from KB Partners, AperiamVentures and Trajectory Ventures alongside media-industry angels, and acquired TRUSTX, the cooperative programmatic marketplace launched by Digital Content Next and roughly 30 premium publishers. It is led by CEO and co-founder Bill Wheaton, previously EVP and chief strategy officer at Akamai.

Combines a privacy firewall and a real-time data cleanroom in one system, so buyers get deterministic person-level targeting, frequency capping and attribution across the open web while no party has to hand over or expose the data it owns.

Funding

  • Security to be acquiredFiled Jun 9, 2026Form D
    $365K/ no target

Product

PRISM AI

Adtech / data cleanroom platform

An advertising platform and real-time data cleanroom that resolves audiences the open web cannot otherwise address, then activates them through any DSP via Deal IDs, with no personal data entering the bidstream.

  • Instant retargeting inside the 24-hour cart-abandonment window
  • Cross-device frequency capping measured per person rather than per device
  • Real-time audience segment updates driven by individual actions

Built for

Direct-to-consumer and ecommerce brands, media buyers, and premium publishers transacting on the open web

People on file