Skip to content

Companies

3,615 companies in the AdTech ecosystem

Cheil Worldwide

Cheil Worldwide

Advertising & Marketing Holding

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.

C

Chemistry

Full-Service Advertising Agency

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

Marketing AgencyAtlanta, Georgia
CHEQ

CHEQ

Ad Fraud & Go-to-Market Security

CHEQ is an AI-powered cybersecurity company that provides a suite of solutions to protect businesses from online fraud, account takeover, and other digital threats.

Ad Fraud PreventionVerification PlatformTel Aviv, Tel Aviv District
C

Chewy Ads

Retail Media / E-Commerce Advertising

Chewy's retail media network offering pet-focused advertising solutions to brands looking to reach highly engaged pet owners on the Chewy platform.

Retail Media PlatformProgrammatic PlatformPlantation, Florida
C

Chili Piper

MarTech/SalesTech (Revenue Operations)

Chili Piper is a SaaS platform that automates meeting scheduling and lead routing for B2B sales teams, helping companies convert inbound leads faster.

Marketing AutomationCustomer EngagementBrooklyn, New York
C

Chitika

Defunct

Ad Networks & Publisher Monetization

Chitika was a search-targeted online advertising network that served billions of ads monthly to publishers outside of Google's ecosystem, specializing in intent-based display advertising.

Contextual AdvertisingAd NetworkWestborough, Massachusetts
Chocolate Platform

Chocolate Platform

Influencer Marketing Technology / Social Commerce

Chocolate Platform is a social commerce and influencer marketing technology company that connects brands with content creators. The platform provides tools for influencer discovery, campaign management, and performance tracking with integrated e-commerce capabilities.

Influencer Marketing
Choozle

Choozle

Programmatic Advertising / Demand-Side Platform (DSP)

Choozle is a leading programmatic advertising platform that empowers digital marketers to plan, buy, and optimize digital ad campaigns across display, video, mobile, and social channels.

Demand Side Platform (DSP)Marketing PlatformDenver, Colorado
Choreograph

Choreograph

Data Platforms / AdTech Infrastructure

Choreograph is WPP's data company — formed April 2021 from the merger of Wunderman Thompson Data + GroupM MPlatform. Provides audience data, identity, and analytics infrastructure across all WPP agencies. Now part of WPP Media (post-2025 GroupM rebrand).

Data Management PlatformMarketing Technology
Chorus.ai

Chorus.ai

Acquired

Conversation Intelligence / Sales Technology

Chorus.ai is a leading conversation intelligence platform acquired by ZoomInfo that records, transcribes, and analyzes sales calls and meetings to help revenue teams improve performance.

AI-Powered PlatformMarketing AnalyticsSan Francisco, California
Churnzero

Churnzero

Customer Success Platform (MarTech/Customer Engagement, not AdTech)

ChurnZero is a leading Customer Success platform designed for subscription businesses to combat churn and drive growth. It provides a comprehensive suite of tools that enable customer success teams to understand customer health, automate personalized experiences, and engage proactively. The platform helps businesses manage the entire customer lifecycle, from onboarding to renewal, ensuring customers achieve value from their products.

Marketing AutomationCustomer EngagementWashington, District of Columbia
C

Cimagine Media

Defunct

Augmented Reality / AR Commerce

AR commerce startup acquired by Snap Dec 2016. Tech integrated into AR Try-On features.

Commerce TechnologyE-commerce MarketingTel Aviv
Cincopa

Cincopa

Digital Asset Management / Content Delivery

Cincopa is a comprehensive digital asset management (DAM) platform that enables businesses to host, manage, and embed various media types like videos, images, audio, and documents. It provides customizable galleries, advanced analytics, and integrations to enhance online content delivery and engagement across websites and digital channels.

Video TechnologyNew York, New York
C

Cint

Market Research & Consumer Insights Technology

Cint is a global software leader in digital insights and research technology, connecting researchers with consumers through the world's largest consumer network for survey-based research.

Data & AnalyticsMarketplace TechnologyStockholm, Stockholm
C

Circana

Market Research & Analytics/Data Provider

Circana is a leading market research and analytics firm formed from the 2022 merger of IRI and NPD Group, providing consumer behavior insights and purchase data across retail and CPG industries.

Data & AnalyticsAttribution & AnalyticsChicago, Illinois
CircleCI

CircleCI

DevOps & Continuous Integration/Continuous Delivery (CI/CD)

CircleCI is a leading continuous integration and continuous delivery (CI/CD) platform that empowers software development teams to automate their build, test, and deployment processes. The company provides cloud-native developer tools that enable engineering organizations to release code with confidence and speed, reducing the time from commit to deployment while maintaining high quality standards. CircleCI's platform is designed to integrate seamlessly into modern development workflows, suppo...

Marketing TechnologySan Francisco, California, USA, California
Cisco Meraki

Cisco Meraki

Physical Security & Video Surveillance

Cisco Meraki provides cloud-managed IT solutions including wireless, switching, security, and IoT devices for simplified network management.

Marketing TechnologySan Francisco, California
Cision

Cision

PR Technology / Earned Media Intelligence

Cision is a leading PR and earned media software platform that helps brands monitor, analyze, and amplify their communications across global media channels.

Influencer MarketingSocial Media ManagementChicago, Illinois
C

Citizen Relations

Earned-Media & Public Relations Agency

Citizen Relations is a North American earned-media + PR agency, headquartered in Toronto with offices across Canada and the US. Originally part of the Vision7 group, transferred to BlueFocus in 2017 and divested to Plus Company in May 2021. Specializes in influencer + earned-media + brand PR. Sources: Plus Company portfolio + Citizen Relations.

CitrusAd

CitrusAd

Retail Media

CitrusAd is a retail media platform that enables retailers to monetize their digital properties through sponsored product ads, now operating as part of Publicis Groupe.

Retail Media PlatformAd ServerBrisbane, Queensland
Civic

Civic

Identity Verification / Blockchain Infrastructure

Civic Technologies is a leading provider of decentralized identity verification solutions, leveraging blockchain technology to empower users with control over their personal data. Their platform enables businesses to securely verify identities, streamline onboarding processes, and reduce fraud while enhancing user privacy.

Identity ResolutionBlockchain AdvertisingSan Francisco, California
CJ Affiliate

CJ Affiliate

Affiliate Marketing

CJ Affiliate is a global affiliate marketing network connecting advertisers with publishers to drive performance-based customer acquisition and sales.

Attribution & AnalyticsCustomer AcquisitionSanta Barbara, California
Clarabridge

Clarabridge

Acquired

Customer Experience Management / Text Analytics

Clarabridge was a leading customer experience management (CEM) platform that used AI-powered text analytics to transform customer feedback into actionable insights — acquired by Qualtrics in 2021.

Data & AnalyticsCustomer Data PlatformReston, Virginia
Claravine

Claravine

Marketing Data Governance / MarTech

Claravine is a marketing data governance platform that helps organizations standardize, control, and connect their marketing data from the point of creation. It ensures data quality and consistency across various marketing and advertising channels, enabling more accurate analytics, better activation, and improved compliance.

Attribution & AnalyticsData Management PlatformDenver, Colorado