HarrisX

Washington, D.C., USA · Founded 2017

51-200 employees

Sourced & current · updated May 11, 2026Website

Mobile-first market research firm. Formed 2017 when Stagwell bought Nielsen mobile-research assets.

Where they sit

Stack tier: Marketing Technology (C)

Data & AnalyticsVerification & Measurement

Mid-tier but high-profile research firm known for fast-turnaround digital polling and strong media partnerships