Skip to content
ATDbbeta
BM

Brian Mandelbaum

Operator

Brian Mandelbaum is the Co-Founder and CEO of Attain, a consumer-permissioned commerce data and advertising-measurement company. He has spent his career building first-party-data and programmatic advertising platforms, and was named an EY Entrepreneur Of The Year 2025 Midwest Award finalist.

Last updated Oct 18, 2026 by the ATDb Editorial Team

Role
CEO & Co-Founder
Company
Attain
Based
Chicago, Illinois, United States
Connections
1

AI-drafted from public sources6 sources cited

Years in industry
15 years

Bio

Brian Mandelbaum is the Co-Founder and CEO of Attain, a consumer-permissioned commerce data and advertising-measurement company. He has spent his career building first-party-data and programmatic advertising platforms, and was named an EY Entrepreneur Of The Year 2025 Midwest Award finalist.

Career

Roles with a cited source. All linked roles are in the Roles tab.

Expertise & education

Expertise

First-Party DataConsumer Data MonetizationProgrammatic AdvertisingPrivacy-Compliant AdvertisingIdentity ResolutionConsumer Engagement PlatformsData PartnershipsCookieless Targeting

Speaking topics

First-party data strategies in a cookieless worldConsumer-permissioned data and privacy complianceProgrammatic advertising and data monetizationThe future of identity resolution in AdTech

Recognition

Notable achievements

  • Led Klover to become a recognized first-party data and consumer rewards platform serving major brand advertisers
  • Built a consent-based data model at Klover that aligns consumer incentives with advertiser data needs in a post-cookie environment
  • Scaled Klover's user base to millions of consumers, creating a proprietary first-party data asset for advertisers
Connection details