ClearLine enables advertisers and agencies to buy premium CTV and streaming TV inventory directly from publishers through Magnite's sell-side platform, reducing intermediary fees and improving transparency and control.
Last updated Oct 24, 2026 by the ATDb Editorial Team
A direct-to-publisher programmatic TV buying platform from the largest independent SSP, positioned as a supply-path optimization solution for CTV and streaming inventory
Magnite ClearLine is a self-service buying tool from Magnite, the sell-side advertising platform. Launched on April 17, 2023, it lets agencies buy premium connected TV and online video inventory directly from Magnite's platform without going through a demand-side platform, and it works with any ad server.
Business model
SaaS / Marketplace
Target market
Enterprise
What they offer
Key features
Direct-to-publisher buying without DSP intermediarySelf-service campaign activation for CTV and streaming TVSupport for programmatic guaranteed and PMP deal typesSupply-path optimization to reduce intermediary costsAccess to Magnite's premium CTV publisher network including major streaming platformsReal-time reporting and campaign analyticsIntegration with agency and advertiser workflows
Use cases
Agencies buying CTV inventory directly from premium publishers to reduce feesBrand advertisers seeking transparent, direct access to streaming TV audiencesSupply-path optimization initiatives to reduce programmatic intermediary costsProgrammatic guaranteed deal execution for upfront-style CTV buysPrivate marketplace deal activation for premium streaming inventory
Customer segments
Media buying agencies and agency holding companiesBrand advertisers with direct programmatic capabilitiesIndependent trading desksPerformance-focused CTV advertisers
Tech & specs
Technology stack
Magnite's sell-side programmatic infrastructureSpringServe ad server (acquired by Magnite)SpotX CTV technology stackReal-time bidding (RTB) protocolsOpenRTB standardsServer-side ad insertion (SSAI)