Enabled premium video publishers to maximize revenue through programmatic advertising while maintaining control over their inventory and brand safety across all screens including connected TV.
Last updated Feb 8, 2026
- Industry
- Video Advertising/Supply-Side Platform (SSP)
- Business Model
- SaaS/Platform
- Target Market
- Enterprise
- Employee Count
- 201-500
- Funding
- $100M+
- Revenue Range
- $200M-$300M
- Stock Symbol
- NASDAQ:MGNI
- Parent Company
- Magnite
- API Available
- Yes
Market Position
Leading independent video SSP prior to acquisition, particularly strong in CTV and premium video
Overview
SpotX was a leading global video advertising platform that provided programmatic advertising technology for premium video publishers and media owners. The company operated a supply-side platform (SSP) that enabled publishers to monetize their video content across connected TV (CTV), desktop, mobile, and other digital platforms by connecting them with demand-side platforms and advertisers. SpotX was known for its focus on premium video inventory and its strong presence in the emerging connected TV advertising market. Founded in 2007, SpotX grew to become one of the largest independent video SSPs before being acquired by Magnite (formerly Rubicon Project) in April 2021 for $1.17 billion. The acquisition created one of the largest independent CTV and video advertising platforms globally. SpotX's technology platform was particularly valued for its header bidding capabilities, real-time decisioning, and tools that gave publishers control over their video inventory while maximizing yield through programmatic auctions.
Products & Features
SpotX Platform
Core SSP platform for programmatic video advertising across all screens
SpotX for Publishers
Tools for publishers to manage and monetize video inventory
SpotX for Broadcasters
Solutions specifically designed for TV broadcasters and OTT platforms
Header Bidding
Video header bidding technology to maximize publisher yield
Private Marketplace (PMP)
Tools for creating and managing private marketplace deals
Key Features
Programmatic video ad servingConnected TV (CTV) advertisingHeader bidding for videoReal-time bidding (RTB)Private marketplace dealsYield optimizationBrand safety controlsAdvanced reporting and analyticsServer-side ad insertion (SSAI)Multi-format video support (in-stream, out-stream)
Use Cases
Premium video publishers monetizing content across devicesBroadcasters transitioning to digital and OTT platformsConnected TV platforms selling advertising inventoryMobile app publishers with video contentNews and entertainment websites with video playersSports streaming platforms
Customer Segments
Premium video publishersBroadcasters and TV networksOTT/streaming platformsConnected TV device manufacturersDigital media companiesNews and entertainment publishers