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Sizmek

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Multi-Screen Open Ad Management | Sizmek

New York City, United StatesFounded 1999Marketing
Valuation $25–50M Last recorded · 2004
Headcount 100–500 Current team size
Total funding $10–50M Disclosed equity funding
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About Sizmek

Sizmek's journey in the ad-tech space is a multi-chaptered story of acquisitions and technological evolution, culminating in its current position as a key component of Amazon's advertising services. The company's origins can be traced back to 1999 with the founding of Eyeblaster in Israel by Gal Trifon and Eli Or. Eyeblaster quickly established itself as a significant player in the rich media advertising sector. A major turning point occurred in 2011 when the company was acquired by MediaMind, an advertising technology firm. Following this acquisition, the combined entity rebranded as Sizmek in 2013, aiming to provide a comprehensive, open ad management platform for multiscreen campaigns. This new entity continued to grow, notably acquiring the rich-media ad-serving company PointRoll in 2015 to bolster its creative capabilities.

The firm's trajectory took another significant turn when it was acquired by the private equity firm Vector Capital in 2016 for approximately $122 million. Under Vector Capital's ownership, Sizmek expanded its portfolio further by acquiring Rocket Fuel, a company specializing in artificial intelligence for marketing, in 2017. This move was intended to integrate AI-driven predictive marketing with Sizmek's ad serving and creative optimization tools. Despite these strategic acquisitions aimed at creating an independent advertising technology powerhouse, the company faced significant financial challenges. In March 2019, Sizmek filed for Chapter 11 bankruptcy protection.

This period of uncertainty concluded in 2019 when Amazon acquired Sizmek's ad-serving and dynamic creative optimization (DCO) businesses for an undisclosed sum. This strategic purchase allowed Amazon to integrate Sizmek’s well-established technologies into its own growing advertising division, now known as Amazon Ads. Today, operating as Sizmek by Amazon, the business provides advertisers and agencies with a suite of tools for creating, distributing, measuring, and optimizing their digital advertising campaigns. The core offerings include ad serving, which is the delivery of ads to various digital platforms, and dynamic creative optimization, a technology that personalizes ad creatives in real-time based on user data and context. The business model is centered on providing these technology solutions to a global client base, helping them to manage complex campaigns and enhance their marketing return on investment across more than 70 countries.

Source: Dealroom company data

At a glance

Founded
1999
Headquarters
New York City, United States
Sector
Marketing

Investors

3 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A3 investors entered at this stage

Team profiled 100 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators Hidden — book a demo quality score
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
19 countries with
team presence
🇮🇱 Israel23.4%
🇺🇸 United States23.4%
🇨🇳 China8.5%
🇮🇳 India6.4%
🇮🇩 Indonesia4.3%
Top 5 of 19 shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Sizmek on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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