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Companies

3,804 companies in the AdTech ecosystem

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
Clarifai

Clarifai

AI/ML Platform with AdTech Applications

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.

Contextual AdvertisingAI-Powered PlatformWashington, District of Columbia
Clarip

Clarip

Privacy Technology / RegTech / Compliance Software

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...

Privacy & Consent ManagementPrivacy TechnologyPhiladelphia
Claritas

Claritas

Audience Data & Consumer Intelligence

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.

Attribution & AnalyticsIdentity ResolutionSan Diego, California
Clarivoy

Clarivoy

Automotive Marketing Analytics

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

Attribution & AnalyticsMarketing AnalyticsCincinnati, Ohio
Claude

Claude

AI/LLM Infrastructure for AdTech

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.

AI-Powered PlatformMarketing TechnologySan Francisco, California
Claude Design

Claude Design

AI Design / Creative Generation / MarTech

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

Clean.io

Ad Security & Verification

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.

Ad Fraud PreventionVerification PlatformNew York, New York
C

Clear Channel Outdoor

Out-of-Home (OOH) Advertising

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

Digital Out-of-HomeLocation-Based AdvertisingSan Antonio, Texas
Clearbit

Clearbit

Acquired

B2B Data Enrichment & Intelligence

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

Customer Data PlatformIdentity ResolutionSan Francisco, California
Clearscope

Clearscope

Content Marketing Technology / SEO Tools

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.

Marketing TechnologyContent DiscoveryPhiladelphia, Pennsylvania
Clearslide

Clearslide

Acquired

Sales Enablement Technology

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.

Marketing TechnologySan Francisco, California
ClearVoice

ClearVoice

Content Marketing Technology

Marketing PlatformContent DiscoveryPhoenix, Arizona
C

Clemenger BBDO

Creative Advertising Agency

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

Marketing AgencyMelbourne, Victoria
C

Clerk.io

E-Commerce Personalization and Search

Clerk.io is an AI-powered personalization and search platform for e-commerce, helping online retailers boost conversions through intelligent product recommendations, site search, and email personalization.

Customer Data PlatformE-commerce MarketingCopenhagen, Capital Region
CleverTap

CleverTap

Customer Engagement & Marketing Automation

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.

Marketing AutomationCustomer EngagementMountain View, California
Click Guardian

Click Guardian

Click Fraud Prevention / Ad Verification

Click Guardian is a leading click fraud protection service designed to safeguard pay-per-click (PPC) advertising campaigns from invalid clicks. It employs advanced algorithms to identify and block fraudulent activity, ensuring that businesses maximize their ad spend and improve the return on investment for their digital marketing efforts.

Ad Fraud PreventionVerification PlatformLondon, England
C

Click-to-WhatsApp Ads

Social & Conversational Advertising

Meta's fastest-growing SMB ad format — cross-app placement spanning Facebook/Instagram → WhatsApp business chat. +60% YoY revenue Q3 2025. Strategic messaging-as-commerce surface.

Customer EngagementPerformance MarketingMenlo Park, California
C

Clickadu

Ad Network

Clickadu is a global advertising network specializing in pop-under, push notifications, and alternative ad formats for publishers and advertisers.

Ad NetworkProgrammatic PlatformLimassol
ClickBank

ClickBank

E-commerce Platforms & Digital Marketplaces

ClickBank is a leading digital marketplace and e-commerce platform that specializes in connecting product creators with affiliate marketers to facilitate the distribution and sale of digital products. Established as one of the pioneering platforms in the digital product space, ClickBank has built a robust ecosystem that enables entrepreneurs, content creators, and information product vendors to reach global audiences through a vast network of affiliate partners. The platform handles all aspec...

Marketplace TechnologyE-commerce MarketingBoise, Idaho, United States
Clickcease

Clickcease

Ad Fraud Prevention / Click Fraud Detection

ClickCease is a leading click fraud prevention software that protects online advertising campaigns from invalid clicks and bot traffic. It utilizes advanced algorithms and machine learning to identify and block fraudulent sources, ensuring advertisers only pay for legitimate engagement. This helps businesses improve their ad campaign ROI by preventing wasted ad spend across platforms like Google Ads and Facebook Ads.

Ad Fraud PreventionTel Aviv