Sizmek

Merged

New York, New York, United States · Founded 2000

1001-5000 employees · NASDAQ:SZMK

Sourced & current · updated Jul 15, 2026Website

Sizmek was a leading independent ad serving and programmatic advertising platform that powered campaigns across display, video, mobile, and social channels before filing for bankruptcy in 2019.

Where they sit

Stack tier: Ecosystem Services (A)

Creative Management PlatformVideo Advertising PlatformProgrammatic Platform

Formerly one of the largest independent ad servers globally; a neutral alternative to Google's ad tech stack before being acquired by Amazon and discontinued