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Brief
SpotX was rebranded to Magnite (Jan 2021)— see Magnite for current status.— See the full lineage →
SpotX

SpotX

Video Advertisingmagnite.com

SpotX, now operating as part of Magnite, was a video advertising and monetization platform that was acquired by Magnite, Inc. in 2021.

Last updated Oct 5, 2026 by the ATDb Editorial Team · Connections updated Oct 12, 2026

Founded
2007
HQ
Broomfield, Colorado, United States
Connections
48

AI-drafted from public sources22 sources cited

At a glance

Employees
501-1000
Funding
$100M+
Revenue
$100M-$250M
Stock
NASDAQ:MGNI
36integrations7competitors

About

Was one of the largest independent video-focused SSPs globally before being absorbed into Magnite, the largest independent sell-side advertising platform

SpotX, now operating as part of Magnite, was a video advertising and monetization platform that was acquired by Magnite, Inc. in 2021. It served premium publishers with holistic yield management tools — including programmatic technology, a modern ad server, and private marketplace capabilities — designed to maximize revenue across desktop, mobile, and connected TV inventory while giving publishers greater transparency and control over advertiser buying behavior. Publishers used SpotX to consolidate all of their demand sources — including ad networks, DSPs, trading desks, and exchanges — into a single platform where media owners could manage inventory and maximize revenue. SpotX was sold to Magnite for a purchase price consisting of $560 million in cash and 14.0 million shares of Magnite stock, implying an enterprise value of $1.17 billion. Source 1: wikipedia.org — SpotX Source 2: hig.com — SpotX - H.I.G. Capital Portfolio Company Source 3: stevieawards.com — Serving All Your Video Ad Needs with SpotX Source 4: bertelsmann.com — RTL Group Sells Its US Ad-Tech Company SpotX

Business model

Marketplace

Target market

Enterprise

What they offer

  • Video SSP

    Core supply-side platform enabling publishers to manage, sell, and optimize video ad inventory programmatically across all screens

  • CTV/OTT Monetization

    Specialized tools for connected TV and over-the-top streaming publishers to monetize content with premium programmatic demand

  • Private Marketplace (PMP)

    Deal management tools allowing publishers to create curated, premium inventory packages for direct buyer relationships

  • Audience Data Platform

    First- and third-party data integration capabilities to enhance targeting and yield for video inventory

  • Ad Quality & Brand Safety

    Tools to ensure brand-safe environments and filter invalid traffic across video supply

Key features

Programmatic video ad serving across CTV, OTT, mobile, and desktopReal-time bidding (RTB) and header bidding supportPrivate marketplace and programmatic direct deal managementAdvanced audience targeting and data integrationComprehensive ad quality and brand safety controlsPublisher yield optimization and analyticsVAST/VPAID/SSAI support for video ad delivery

Use cases

Monetizing CTV and OTT streaming inventory programmaticallyManaging video ad sales across multiple screens and formatsExecuting private marketplace deals for premium video inventoryEnabling broadcasters to transition linear TV budgets to digital/streamingAudience-targeted video advertising for brand advertisers

Customer segments

Broadcast and cable television networksStreaming and OTT publishersDigital video publishersMobile app publishers with video inventoryMedia companies and content owners

Tech & specs

Technology stack

Real-time bidding infrastructureServer-side ad insertion (SSAI)VAST/VPAID/VMAP ad standardsOpenRTB protocolCloud-based ad servingMachine learning for yield optimization

Security & compliance

GDPRCCPAIAB TCFTAG Brand Safety Certifiedads.txt / sellers.json

Deployment

Cloud

API

Yes

Explore further

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