Companies

Cisco — recorded in ATDb as the acquirer/parent of one or more AdTech companies (s375 lineage backfill).

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

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

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

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.

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

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.

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.

Clarifai is a leading AI platform for unstructured data, specializing in computer vision, natural language processing, and large language models. It provides a full-stack AI platform that enables developers and enterprises to build, deploy, and scale AI applications. Clarifai's technology helps organizations understand, organize, and make predictions from images, video, text, and audio data.

Clarip is an AI-powered privacy management and data protection platform designed to help organizations navigate the increasingly complex landscape of global data privacy regulations. The company addresses the critical challenge faced by modern enterprises: maintaining compliance across multiple regulatory frameworks including GDPR, CCPA, LGPD, and other international privacy laws while managing resource constraints. By transforming traditionally manual and resource-intensive privacy processes...

Claritas is a leading data-driven marketing and audience intelligence company, offering consumer segmentation, identity resolution, and targeting solutions to help brands reach the right audiences.

Clarivoy is an automotive marketing analytics and attribution platform that helps dealerships and OEMs measure and optimize their advertising performance across channels.

Anthropic's flagship LLM family — Claude 3.5/3.7/4 series. AdTech-relevant via PubMatic+Amnet first agentic ad campaign in France, The Trade Desk testing for campaign creation, ad agencies using Claude enterprise tools.

Anthropic's design-asset generation product launched 2026-04-17. Generates prototypes, slide decks, marketing one-pagers, and brand visuals from natural-language prompts; native Canva export is the AdTech-relevant hook. Figma stock dropped 7% on launch day. Distinct from claude.ai (chat surface) — this is the visual-creative product surface for marketers and brand teams.

Clean.io is a cybersecurity company specializing in real-time threat detection and prevention for websites and digital platforms. It protects publishers, e-commerce sites, and other online businesses from malvertising, client-side attacks, and other digital threats that can compromise user experience and revenue.

Clear Channel Outdoor is a leading global out-of-home (OOH) advertising company operating billboards, street furniture, and transit displays across multiple continents.

Clearbit is a B2B data enrichment and intelligence platform that helps businesses identify, understand, and engage their customers — now operating as part of HubSpot.

Clearscope is a leading SEO content optimization platform that helps content creators and marketers produce high-ranking content. It provides data-driven insights and recommendations based on top-ranking search results, enabling users to craft content that resonates with both search engines and audiences.

ClearSlide was a sales engagement platform that provided content management, communication tracking, and analytics tools for sales teams before being acquired by Bigtincan in 2019.

Clemenger BBDO is one of Australia and New Zealand's most awarded creative agencies, delivering integrated advertising and communications solutions across the region.

CleverTap is a customer engagement and retention platform that helps businesses personalize their interactions with customers across multiple channels, including mobile apps, websites, and email.