OpenX

OpenX

Programmatic ad marketplace with real-time bidding

Overview

OpenX is a programmatic advertising platform that connects publishers, advertisers, and app developers to buy and sell digital ad space in real time. Ads are traded through an auction-like marketplace where advertisers bid for impressions, and the winning bids deliver ads on display, video, or mobile formats. The platform uses real-time bidding to match advertiser goals with available inventory, aiming to maximize publishers’ revenue while helping advertisers reach their target audiences efficiently. Revenue comes from transaction fees on ad placements and premium services such as advanced analytics and audience targeting. OpenX emphasizes marketplace quality and transparency and uses data and technology to combat ad fraud and improve ad performance. Its goal is to provide a reliable, efficient marketplace that improves outcomes for both publishers and advertisers.

About OpenX

Simplify's Rating
Why OpenX is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & Analytics

Enterprise Software

Cybersecurity

Company Size

501-1,000

Company Stage

Series E

Total Funding

$75.5M

Headquarters

Pasadena, California

Founded

2007

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Simplify's Take

What believers are saying

  • OpenX filed its Google antitrust suit August 4, 2025, seeking damages and injunctions.
  • The 2026 midterm political platform opens high-CPM election demand across CTV, mobile, and web.
  • Chalice AI's Hyundai campaign cut CPMs 67%, validating OpenXBuild's curation economics.

What critics are saying

  • OpenX faces a California pixel-tracking class action; claims survived dismissal on January 27, 2026.
  • Google seeks dismissal and consolidation of adtech suits, delaying OpenX damages beyond 2027.
  • FTC/COPPA scrutiny still shadows OpenX, pressuring publisher trust and child-directed inventory deals.

What makes OpenX unique

  • OpenXSelect turns supply-side signals into pre-bid targeting across web, app, and CTV.
  • OpenX IQ launched August 2026 with AI decisioning, quality scoring, and optimization.
  • TVision made OpenX the first SSP to target CTV attention in real time.

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Funding

Total Funding

$75.5M

Below

Industry Average

Funded Over

5 Rounds

Series E funding typically includes additional rounds after Series D if the company needs more capital. The business is usually stable, and these rounds are typically used for further expansion or to address market challenges.
Series E Funding Comparison
Below Average

Industry standards

$100M
$25M
OpenX
$245M
Stripe
$250M
Reddit
$1.3B
Epic Games
$1.5B
Airbnb

Benefits

Professional Development Budget

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

2%

2 year growth

0%
Associated Press
Jun 23rd, 2026
OpenX launches AI-powered media buying suite to improve ad quality and transparency

OpenX, a supply-side platform, has launched OpenX IQ, a suite of AI and machine learning capabilities designed to improve media buying quality and performance. The platform addresses growing demand for transparent AI in advertising, with 46% of advertisers planning to use AI for media strategy whilst 35% of marketers cite concerns over AI decision-making transparency. OpenX IQ integrates high-fidelity supply-side signals into media workflows through features including inventory quality scoring, audience modelling, attention and engagement modelling, and performance optimisation. The capabilities are accessible through OpenXSelect and OpenXBuild platforms. Ranked among the largest SSPs globally for direct publisher partnerships by Jounce, OpenX aims to provide buyers with verifiable quality controls and customisable decisioning models across formats including CTV.

Business Wire
Jun 16th, 2026
Chalice AI and OpenX partner to bring AI-powered video ad curation, cutting Hyundai's CPMs by 67%

Chalice AI has partnered with OpenX to bring AI-powered curation to high-quality video inventory. The integration allows advertisers to deploy custom AI models and bidding agents directly within OpenXBuild, enabling real-time impression-level decisioning at the supply layer. The partnership addresses challenges in video advertising, where marketers struggle to balance quality environments with measurable outcomes amid signal loss and privacy changes. Chalice's AI models operate as always-on bidding agents within OpenX's cloud-native infrastructure, evaluating video impressions based on their likelihood to drive high-value actions. Early results from a Hyundai campaign demonstrated a 20% reduction in cost per high-value action and 67% decrease in CPMs compared to alternatives. The collaboration represents a shift from static curation to dynamic, outcome-based optimisation in premium video advertising.

Associated Press
Apr 13th, 2026
OpenX rebrands as The Intelligent SSP to simplify AI-driven advertising with cloud-native infrastructure

OpenX, a supply-side platform, has unveiled a rebrand positioning itself as "The Intelligent SSP" with a new logo and visual identity. The company aims to simplify digital advertising by addressing industry complexity that has emerged over the past decade. OpenX introduced a streamlined product architecture comprising OpenXSelect, OpenXBuild, OpenXControl and OpenXExchange, built on three pillars: quality, performance and adaptability. The platform features direct publisher relationships, AI-powered curation and a proprietary supply-side identity graph delivering privacy-forward signals. As one of the largest SSPs globally, OpenX operates on fully cloud-based infrastructure designed to support AI-driven, agent-based buying across CTV, mobile and desktop formats. The rebrand reinforces the company's commitment to transparent supply paths and rigorous inventory standards.

Associated Press
Mar 11th, 2026
OpenX and TVision launch first real-time attention targeting for CTV advertising

OpenX Technologies has launched OpenX Attention Targeting, the first supply-side platform solution enabling advertisers to target high-engagement CTV inventory in real time. The feature, powered by TVision's attention measurement technology and available exclusively through OpenXSelect, allows pre-bid targeting based on predictive attention scores. The solution combines data from TVision's in-home viewer panel with OpenX's real-time bidstream signals, including time of day, device type and viewing duration. Advertisers can layer attention signals with audience and contextual targeting across 231 million monthly unique users via OpenX's identity graph. The integration transforms attention measurement from a post-campaign metric into a real-time optimization tool. CTV advertising spend is projected to grow nearly 14% this year, driving demand for greater transparency and performance in the fragmented market.

Business Wire
Feb 23rd, 2026
OpenX launches curated political ad platform with values-based targeting for 2026 US midterms

OpenX Technologies has launched a political advertising platform for the 2026 US midterm elections, offering prioritised access to curated, political-approved inventory across connected TV, mobile and web. The platform enables campaigns to go live in under 24 hours with ZIP code-level targeting. The company announced a partnership with Givsly, integrating first-party data from over 500 nonprofits to target voters based on shared values such as environmental protection and women's empowerment. This approach addresses challenges posed by increasingly unreliable traditional political data. The platform features guaranteed access to pre-vetted publishers including Newsweek, Plex and Scripps, with real-time voter reach reporting by county and ZIP code. OpenX provides turnkey political packages optimised for election windows and compatible with major demand-side platforms.

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