Ad tech stocks
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Ticker byClearTrust
AdTech Sumoby ClearTrust
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The players

219 companies and organisations that make up ad tech, what each one does in plain English, and where it sits in the chain.

Landscape map
All categoriesWalled gardens & platforms 20DSPs (buy side) 40SSPs (sell side) 32Ad exchanges 8Ad servers 15Header bidding & wrappers 7CTV & video 30Mobile app monetisation 15Attribution & MMPs 8Verification 19IVT & fraud prevention 21Brand safety & ad quality 13Data & CDPs 20Identity 10Clean rooms 6Consent & privacy 8Retail & commerce media 19Native & recommendation 11Creative & DCO 9Agencies & holding companies 11Digital out-of-home 8Audio & podcasts 5Affiliate & performance 9Workflow & ad ops 7Industry bodies 12
ListedPrivateDivisionAcquiredNon-profit

PubTrust

Division

ClearTrust's publisher-side ad-quality and malvertising protection, delivered with one script tag.

Brand safety & ad qualityIndia

Adloox

Acquired

European ad verification company, bought by Scope3 in 2024 and then by Peer39 in 2026.

VerificationFrance

Channel Factory

Private

Curates brand-suitable YouTube channels for advertisers.

Brand safety & ad qualityUSA

Check My Ads

Non-profit

Watchdog nonprofit campaigning for ad-industry transparency and against funding disinformation.

Industry bodiesUSA

Confiant

Private

Publisher-side ad quality and malvertising protection, used by major news sites.

Brand safety & ad qualityUSA

DeepSee.io

Private

Publisher-quality intelligence that flags made-for-advertising and risky sites for buyers.

IVT & fraud preventionUSA

DoubleVerify

DV -0.0%

Leading ad verification company checking that ads are seen, safe and served to humans; being bought by Nielsen.

VerificationUSA

GeoEdge

Private

Ad security and quality monitoring for publishers and ad platforms.

Brand safety & ad qualityUSA

Integral Ad Science

Private

Major ad verification company, taken private by Novacap in December 2025.

VerificationUSA

mFilterIt

Private

Indian ad fraud detection and brand protection company for app and web advertisers.

IVT & fraud preventionIndia

Peer39

Private

Pre-bid contextual and brand-safety data provider, which bought Adloox in 2026.

Brand safety & ad qualityUSA

The Media Trust

Private

Digital safety platform that monitors websites and ads for malware, data leakage and privacy issues.

Brand safety & ad qualityUSA

Zefr

Private

Brand-suitability measurement for YouTube, TikTok, Meta and other social video.

Brand safety & ad qualityUSA