Sizmek
Sizmek was a global, multichannel ad server — now merged into Amazon Ad Server — used by advertisers and agencies to create, manage, and deliver digital advertising campaigns across multiple channels and screens.
Last updated Oct 5, 2026 by the ATDb Editorial Team
AI-drafted from public sources26 sources cited
At a glance
- Employees
- 1001-5000
- Funding
- $52.8M
- Revenue
- $100M-$250M
- Stock
- NASDAQ:SZMK
About
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
Sizmek was a global, multichannel ad server — now merged into Amazon Ad Server — used by advertisers and agencies to create, manage, and deliver digital advertising campaigns across multiple channels and screens. It employed a powerful AI platform to make display decisions across the customer journey, using gathered data to target individuals with relevant messages on the right content platforms at the right time, with the goal of turning impressions into conversions. The platform offered multiple options for creative authoring, streamlined campaign management, advanced dynamic creative optimization, and Media Rating Council-accredited measurement, giving customers creative control while centralizing cross-channel insights to aid in campaign optimization. Its full-funnel reporting enabled advertisers to gather detailed information about touchpoints and the customer journey to conversion, while data-driven campaign management tools allowed advertisers to gain insights into campaign performance using MRC-accredited metrics. At its peak, Sizmek operated in more than 70 countries, connecting more than 20,000 advertisers with 3,600 audiences around the globe. Sizmek went public in 2013, was delisted by NASDAQ in 2016, and ultimately ended in bankruptcy in 2019, after which its core ad server business was acquired by Amazon. Source 1: datachannel.co — Sizmek Ad Suite for Creative Building, Distribution & ... Source 2: escape-velocity.com — Sizmek Ad Suite - DCO, Ad Server and Creative Building Source 3: thebannermen.com — Amazon Ads | Sizmek Ad Server Source 4: adexchanger.com — Bye-Bye Sizmek! Amazon Advances Flashtalking And ...
Business model
SaaS
Target market
Enterprise
What they offer
Sizmek Ad Suite
Core ad serving platform for managing and trafficking digital ad campaigns across display, video, mobile, and social channels
Dynamic Creative Optimization (DCO)
Tools for personalizing and optimizing ad creatives in real time based on audience data and contextual signals
Peer39 Contextual Targeting
Semantic and contextual data targeting solution acquired by Sizmek, enabling brand-safe and relevant ad placements
Rocket Fuel DMP/DSP
Demand-side platform and data management capabilities acquired from Rocket Fuel, providing AI-driven programmatic buying
PointRoll Rich Media
Rich media and interactive ad format creation tools acquired from PointRoll
Key features
Use cases
Customer segments
Tech & specs
Technology stack
Security & compliance
Deployment
API
Yes
- 2000 · Founded
- 2017Merged with Rocket Fuel
- 2024Shut down4 sources