Companies

Certona was a personalization and product recommendation engine provider for e-commerce and digital marketing, acquired by Kibo Commerce in 2017.

Chainlink is a decentralized oracle network that provides secure and reliable real-world data to smart contracts on any blockchain. It enables smart contracts to securely interact with off-chain data feeds, web APIs, and traditional bank payments, expanding their capabilities beyond the blockchain.

Chalice provides custom AI and machine learning algorithms for advertising optimization, audience targeting, and campaign performance. The company builds proprietary models for brands and agencies to improve programmatic advertising outcomes.

Chameleon is a product adoption platform that empowers SaaS companies to create personalized in-product experiences without code. It helps improve user onboarding, feature adoption, and overall product engagement through tools like product tours, tooltips, and microsurveys.

Chango was a pioneering search retargeting and programmatic advertising platform that used search intent data to deliver highly targeted display ads before being acquired by Rubicon Project in 2014.

ChannelAdvisor is a cloud-based e-commerce platform that helps brands and retailers optimize their online sales across marketplaces, digital marketing channels, and their own websites.

US e-commerce and retail-media agency. Acquired by Havas February 2025 (majority stake), integrated into Havas Market within Havas Media Network.

Channel Factory is a brand safety and contextual targeting platform specializing in YouTube and connected TV advertising, helping brands reach relevant audiences while avoiding harmful content.

An AI chatbot platform enabling users to create and interact with AI-powered characters, now operating as a subsidiary of Google.

Chartable was a podcast analytics and attribution platform that helped publishers and advertisers measure podcast audience growth and ad performance before being acquired by Spotify in 2022.

Chartbeat is a content analytics company that provides real-time data and tools for publishers to understand audience engagement. It helps editorial and business teams optimize content, improve reader attention, and maximize advertising revenue across various digital platforms.

Chartboost is a leading mobile advertising and monetization platform specializing in in-app advertising for gaming and app developers, now operating as a subsidiary of Zynga.

Charter Communications, Inc. is the second-largest cable operator in the United States, providing video, internet, voice, and mobile services under the Spectrum brand. Headquartered in Stamford, Connecticut. Co-owner (with Comcast and Cox) of the Ampersand multichannel ad-sales JV; its ad-sales arm Spectrum Reach is the operating subsidiary.

Chartio was a cloud-based business intelligence and data visualization platform that enabled non-technical users to explore and analyze data through an intuitive drag-and-drop interface.

OpenAI's flagship conversational AI product launched November 2022. Now an ad-bearing surface in its own right (ChatGPT ad pilot launched 2025-2026 with Criteo partnership). 100+ ATDb news items reference ChatGPT ads, app marketplace, and partnerships.

OpenAI's self-serve advertising platform for ChatGPT, in public beta since 2026-05-05. CPC bidding ($3-$5 range), third-party measurement commitments, conversion tracking via OpenAI Pixel. Launch partners: Criteo (first AdTech partner), Dentsu, Omnicom, Publicis, WPP. Integration partners include Adobe, Kargo, Pacvue, StackAdapt, Invoca. This is OpenAI's native AdTech surface — the most strategically important AI-cluster development for AdTech in 2026, distinct from ChatGPT-the-product because the ads business has its own GTM, pricing, measurement story, and partner network.

Chattermill is an AI-powered customer experience management platform that transforms unstructured customer feedback into actionable business intelligence through advanced natural language processing (NLP) and machine learning technologies. The platform addresses a critical challenge for modern organizations: analyzing massive volumes of customer data across multiple touchpoints in real-time. By consolidating feedback from surveys, customer reviews, support tickets, social media channels, and ...

Check Point Software Technologies is a leading global provider of cybersecurity solutions for enterprises, governments, and service providers worldwide. The company specializes in comprehensive threat prevention technologies that protect customers from malware, ransomware, and other sophisticated cyber attacks across networks, cloud environments, mobile devices, and endpoints. With decades of experience in the cybersecurity industry, Check Point has established itself as a pioneer in unified ...

Checkout.com is a global payment technology company that provides comprehensive commerce infrastructure solutions designed to simplify and optimize digital payment processing for businesses worldwide. The company delivers an end-to-end platform that integrates payment gateway services, fraud prevention, risk management, and advanced analytics into a unified solution. This infrastructure enables merchants to accept, process, and manage payments across multiple channels and geographies while ma...

Cheetah Digital was an enterprise cross-channel customer engagement platform that helped brands build direct, loyalty-driven relationships with consumers through data, messaging, and personalization.

Cheil's India operating subsidiary. Expanded materially in October 2023 via the ₩7.3B acquisition of Mumbai-based influencer-marketing firm Digi-Influence. Source: alphabizkr (Cheil sustainability report secondary).

China-based joint venture serving as Cheil's principal operating arm in greater China, with offices in Beijing and Shanghai. Source: Cheil Sustainability Report 2014.

South Korea's largest advertising and marketing agency, founded January 17, 1973 as the in-house agency for Samsung Group. Listed on the Korea Exchange (KRX: 030000); Samsung Electronics holds ~28.4% as the largest shareholder, with National Pension Service at ~12%. World's 10th-largest agency network with FY2024 revenue of ₩4.34T (~$3.1B; +4.98% YoY) and 53 offices across 44 countries staffed by ~7,000 employees. Headquartered in Seoul. CEO Kim Jong-hyun (since December 2022). Samsung remains the anchor client; over-reliance on Samsung is documented as a qualitative strategic concern but no specific revenue-share percentage is publicly disclosed. Sources: Wikipedia + MarketScreener + Nasdaq.

Chemistry is an independent, full-service advertising agency that blends data-driven strategy with creative execution to help brands build meaningful connections with consumers.