77 shut down AdTech companies

Bidstack was an advertising technology company specializing in dynamic, targeted, and automated native in-game advertising solutions for the…

Microsoft Invest was Microsoft's demand-side platform (DSP), formerly Xandr Invest and, before that, AppNexus.

Poplar Studio was a London studio founded in 2018 by David Ripert and Laurie Ainley that made augmented-reality and 3D experiences for brand…

Wide Angle Analytics was a privacy-focused web analytics platform that provided cookie-free tracking and GDPR-compliant analytics for websit…

Card-linked offer platform that provided automated cashback rewards to consumers when they shopped at participating merchants using their li…

Meta Spark AR was Meta's augmented reality platform that enabled creators and brands to build immersive AR effects for Instagram and Faceboo…

Coull was a UK-based video advertising technology company that enabled publishers and advertisers to place interactive, clickable ads within…

Edgio is a global edge-enabled software platform spanning content delivery, web applications, and edge video.

Google’s 2019–2025 program to replace third-party cookies with privacy-preserving APIs.

Privacy Sandbox API (formerly FLEDGE) for on-device remarketing auctions.

Privacy Sandbox API that exposed broad interest topics inferred on-device from browsing.

Amazon Ad Server was a global ad-serving platform, rebranded from Sizmek Ad Suite in March 2023, that shut down by the end of 2024.

Oracle Advertising was an American cloud-based consumer data collection, activation, and measurement platform for digital advertisers, forme…

Chartable was a podcast analytics platform that enabled publishers to understand and grow their podcast audiences through promotional attrib…

Crackle Plus was a streaming video-on-demand operator under Chicken Soup for the Soul Entertainment that shut down in 2024 when its parent c…

Moat was an ad measurement and analytics platform founded by Jonah Goodhart and Noah Goodhart that shut down in September 2024 when Oracle, …

Oracle Data Cloud was a digital advertising data and technology platform that served as one of the most prominent advertising data sellers i…

Salesforce Audience Studio was a data management platform (DMP) that helped marketers retarget anonymous users across ad networks, and it ha…

Salesforce DMP was a data management platform, originally founded as Krux in 2010, that was acquired by Salesforce in 2016 and has since shu…

CrowdTangle was a social media analytics tool acquired by Facebook November 2016 — provided journalists, researchers, and brands with monito…

Flurry Analytics was a pioneering mobile app analytics platform that provided developers and marketers with deep insights into user behavior…

Socialix is a comprehensive influencer marketing platform that serves as critical infrastructure for brands and marketing agencies managing …

StackPath is a comprehensive edge computing platform provider that delivers integrated content delivery network (CDN) services, security sol…

Perfect Audience was a retargeting platform that enabled small and medium-sized businesses to run display and social media retargeting campa…

PromoteIQ was a retail media technology platform acquired by Microsoft in 2019 that enabled retailers to monetize their digital properties t…

Google's streaming media adapter that casts content from mobile devices and computers to TVs, enabling digital content delivery and advertis…

Music streaming service launched 2020.

Music streaming service launched July 2023 (Indonesia, Brazil, Australia, Singapore, Mexico).

Salesforce Social Studio was an enterprise social media management and listening platform, now sunset as Salesforce shifts social capabiliti…

Google Optimize was a free web experimentation platform that helped marketers test different versions of page features and layouts in order …

Social sharing-button and audience-data company that Oracle agreed to acquire on January 5, 2016 and used to feed Oracle Data Cloud audience…

Bidsopt is a programmatic advertising platform offering a full-stack DSP and SSP solution for agencies, advertisers, and publishers.

Eyereturn Marketing was a digital advertising technology company specializing in dynamic creative optimization and programmatic display adve…

Near Intelligence is a global data intelligence platform specializing in location-based audience insights and people intelligence, helping b…

Stitcher was a podcast streaming platform and network that provided on-demand audio content and podcast advertising solutions before being s…

French location-sharing social-app.

Amazon Sumerian was AWS's browser-based platform for creating augmented reality (AR), virtual reality (VR), and 3D web experiences without r…

TikTok Now was ByteDance's short-lived BeReal clone that prompted users to share simultaneous front-and-back camera snapshots daily, discont…

Coil was a web monetization platform that used the Interledger Protocol to enable micropayments, allowing creators to earn revenue from subs…

Spotify's live audio chat product (acquired Locker Room March 2021, rebranded to Greenroom June 2021).

Facebook Local Awareness Ads was a unique ad format built by Facebook to make advertising for local businesses easier and more effective, la…

Content.ad is a digital advertising technology platform specializing in content discovery and native advertising solutions that connect publ…

MoPub was a mobile ad network and monetization platform for app developers that has since shut down, having been founded in 2010 and acquire…

CNN+ was Warner Bros.

Alexa Internet was a pioneering web analytics and traffic measurement service that provided competitive intelligence and website ranking dat…

Chartio was a cloud-based business intelligence and data visualization platform that enabled non-technical users to explore and analyze data…

Tophatter is a mobile-first online auction marketplace that revolutionizes e-commerce through its distinctive 90-second rapid-fire auction f…

Popcorn Metrics was a London-based SaaS platform that enabled marketers and product teams to track user behaviour and in-app events without …

PRAM was an industry coalition working to develop privacy-safe, interoperable standards for addressable digital advertising in a post-cookie…

Snap's AR-camera drone (the 'Pixy').

Scroll was an ad-free subscription service that paid publishers based on time spent reading, acquired by Twitter in 2021 and later shut down…

Vidnami was a cloud-based video creation tool that automated the production of marketing videos from text scripts, primarily serving content…

DigiTrust was an IAB Tech Lab initiative that provided a standardized, privacy-focused user identity solution for digital advertising, aimin…

English news-aggregator (overseas Toutiao).

Ukrainian AI/computer vision startup acquired by Snap Jan 2020 for $166M.

Eyeview was a video advertising platform specializing in personalized, outcome-driven video ads at scale before shutting down in December 20…

IgnitionOne was a leading digital marketing technology platform that provided cross-channel campaign management, audience scoring, and custo…

Onavo was a mobile analytics + VPN company acquired by Facebook October 2013 (~$120M).

Barton F.

Yieldr was a programmatic advertising platform specializing in data-driven audience targeting and campaign optimization, with a strong focus…