Screen Reader Standards for Video Accessibility and Connected TV

Simulmedia is a technology-driven television advertising company that helps advertisers, agencies, and growth marketers plan, buy, and measure campaigns across linear TV, connected TV (CTV), and games. Its products include the Performance TV media-buying service, the AI-powered TV+ media-buying platform, and Simulmedia Self-Serve.

Telaria was an independent supply-side platform (SSP) for premium video and connected TV (CTV) advertising, formerly known as Tremor Video's sell-side business. Its Video Management Platform (VMP) combined an ad server built for advanced/OTT TV with real-time analytics, automated decisioning, yield optimization, and integrated programmatic plus…

A collection of Accessibility requirements for Video Platforms and Connected TV

tvScientific is a connected-TV (CTV) advertising platform for performance marketers, pairing premium streaming-TV inventory with AI-powered bidding and optimization and outcome-based measurement so brands can run television campaigns against measurable goals like sales, app installs, and site traffic.

GumGum is a Santa Monica-based advertising technology company, founded in 2008, that sells contextual, CTV/online-video and high-impact display advertising built on its own content intelligence.

Spot Runner is an AI-driven advertising technology company (backed by Battery Ventures) focused on contextual media planning for Connected TV (CTV) and online video. Its platform uses proprietary MicroModeling AI through tools such as ContextPlanner and ContextDeals to match advertiser creative to the most relevant, brand-suitable premium video ad…

Adelphic is an enterprise demand-side platform (DSP) for programmatic advertising, originally founded as a mobile-first programmatic buying platform and acquired by Viant Technology in 2017.

Covatic is a UK-based, B Corp certified advertising technology company providing privacy-preserving audience intelligence and addressability for media owners, broadcasters, publishers, and advertisers.

StackAdapt is an AI-powered programmatic advertising platform with REST and GraphQL APIs for managing campaigns, ad groups, creatives, targeting segments, pixel tracking, and performance reporting across native, display, video, connected TV, audio, and digital out-of-home channels.

Rubicon Project is a Los Angeles-based advertising technology company, founded in 2007, that built and operated one of the largest real-time bidding advertising exchanges, connecting digital publishers (the sell side) with advertisers and demand-side platforms.

Truex Media — TrueX (stylized true[X]) is an interactive, opt-in video advertising company now operating as part of Infillion. Its technology delivers "attention-based" ad experiences — Choice Cards and interactive engagement units that let viewers opt in to a single, longer branded interaction in exchange for an ad-free content break — across…

DoubleVerify (NYSE: DV) is a New York-based software platform for digital media measurement, data, and analytics. The company's Media Effectiveness Platform — branded DV MAP (Media AdVantage Platform) — verifies ad impressions across the open web, social, connected TV, and commerce networks, detecting fraud and invalid traffic (IVT), measuring…

Outbrain Inc. (NASDAQ: OB), which closed its acquisition of Teads in early 2025 and now operates publicly as Teads, is one of the largest open-internet advertising platforms — reaching 2 billion+ consumers per month across 50+ markets, with 20,000+ direct advertisers and 10,000+ premium media properties.

Choozle is a self-service digital advertising platform providing REST APIs for managing programmatic campaigns, audience segments, creative assets, publisher deals, and performance reporting across Display, CTV, Video, Audio, Native, DOOH, Search, and Social channels.

PubMatic is a Redwood City, California-headquartered independent technology company (NASDAQ: PUBM) operating a supply-side platform (SSP) that powers programmatic advertising for publishers, media buyers, commerce media, and AI agents across CTV, mobile app, online video, display, and audio.

The Trade Desk is an independent, omnichannel demand-side platform (DSP) for programmatic advertising, headquartered in Ventura, California. Its cloud-based platform — Kokai (the current flagship, succeeding Solimar) — lets agencies, brands, and trading desks buy and optimize digital ad inventory across connected TV (CTV), audio, mobile, video…

Atmosphere (Atmosphere TV) is an Austin, Texas streaming television platform built for businesses rather than households. Spun out of Chive Media Group (theCHIVE) in 2019, it delivers free, ad-supported, audio-optional short-form channels - CHIVE TV, Atmosphere Sports, Happy TV, Nostalgia TV and partner channels - to bars, restaurants, gyms and…

TripleLift is a programmatic advertising company specializing in native inventory with APIs for managing native ad units, deals, targeting, viewability measurement, and creative quality.

Magnite, Inc. (NASDAQ: MGNI) is the world's largest independent sell-side advertising platform, headquartered in New York with major operations in Los Angeles. Formed in 2020 from the merger of Rubicon Project and Telaria, and expanded through the acquisitions of SpotX (2021), SpringServe (2021), and Streamr.ai (2025), Magnite operates an…