Ground truth for
digital advertising.

Observed, not declared. DeepSee analyzes inventory directly
across the open web, mobile, and CTV. Page by page, app by
app, channel by channel. The independent source DSPs, SSPs,
and agencies use to avoid MFA and AI-generated content. And to
find the environments that fit their brand and their buy.

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Trusted by businesses and agencies

Read our latest analysis and published work.

We try to push information out as we get it, in an ever-evolving landscape
we need to work together to understand the complex web. Let us help.

As Cited By

Educational

Ads.txt Solved Verification for Web. Here’s Why App Environments Are Still Broken

Educational

What I Think App Platforms Should Require Before Letting New Sellers In

The Method

Observed vs Declared

Most quality signals in digital advertising come from what publishers, apps, and channels say about themselves. Self-reported data is easy to publish and easy to game. The signals that actually decide a campaign sit below the surface of any file a publisher writes. Whether content is AI-generated, whether ads outnumber editorial content.

Declared Data

Ads.txt files
Sellers.json claims
Declared categories
Stated inventory
Claimed audience

where self-reporting ends

Observed Reality

AI-generated content
Real ad density
True refresh rates
Hostile UX patterns
Actual supply paths
MFA behavior
In-context brand safety
Fraud in delivery

Most of the inventory
is underwater.
DeepSee sees all of it.

Declared data tells you what an inventory source
wants you to know. Observation tells you what's actually
running. That difference is the difference between a
campaign that delivers into quality and one that funds
the problem.

Content A site's declared IAB category says News & Politics. Observation shows AI-generated reprints with fourteen ad slots and a 4-second refresh.
Supply chain A sellers.json entry claims a direct publisher relationship. Behavioral mapping shows the same impressions resold across three intermediaries.
Channel A CTV app's store listing promises premium, ad-supported originals. Runtime observation finds reformatted YouTube uploads stitched into linear-style breaks.

The Method

Observed vs Declared

Declared Data

Ads.txt files
Sellers.json claims
Declared categories
Stated inventory
Claimed audience

where self-reporting ends

Observed Reality

AI-generated content
Real ad density
True refresh rates
Hostile UX patterns
Actual supply paths
MFA behavior
In-context brand safety
Fraud in delivery

Most of the inventory is underwater. DeepSee sees all of it.

Declared data tells you what an inventory source wants you to know. Observation tells you what's actually running. That difference is the difference between a campaign that delivers into quality and one that funds the problem.

Content A site's declared IAB category says News & Politics. Observation shows AI-generated reprints with fourteen ad slots and a 4-second refresh.
Supply chain A sellers.json entry claims a direct publisher relationship. Behavioral mapping shows the same impressions resold across three intermediaries.
Channel A CTV app's store listing promises premium, ad-supported originals. Runtime observation finds reformatted YouTube uploads stitched into linear-style breaks.

"DeepSee plays an essential role in our evaluation and classification of domains, helping us spend budgets in the most brand safe and ad friendly environments possible."

Robin Strauss

Sr. Director, Ad Operations

"In tackling the challenges of a post-cookie advertising world, our collaboration with DeepSee.io has been instrumental. They equip us with comprehensive site intelligence and actionable data, enabling the curation of premium programmatic inventory strategies."

David Nyurenberg

Director

"Mediavine's core business strategy has always been to monetize and support human content creators. We've turned to DeepSee to aid us in monitoring quality across our publisher set of over 11,000 sites, giving advertisers the reassurance necessary to successfully capitalize on the open internet."

Brad Hagmann

Sr. Vice President, Operations

"DeepSee tools enable our teams to get a head start on troubleshooting partner issues. This saves our team valuable time allowing us to scale and spend more time focused on driving revenue with more partners."

Scott Wolke

Director, Publisher Operations

"Deepsee has been key in identifying MFA websites for our global client [...]As a result, our client has been able to stop media spends on MFA websites and optimise the use of their media budget."

Louis Herbier

Account Director

Let the numbers speak for themselves.

Improve outcomes and make informed decisions

49%

Lift in Human Attention

Eyes don't lie. When you strip out MFA clutter and verify the environment, active view rates increase by nearly half.

155%

ROI Uplift

Stop subsidizing arbitrage. By cutting out uninhabited sites, our clients saw their return on prospecting spend more than double.

20%

More Effective Reach

Scale counts for nothing if no one is there. We help you swap empty impressions for real ones, extending your reach without increasing your budget.

Poor quality publisher domains affect every part of the ad-tech ecosystem

15%

of Spend is Subsidizing Slop

Billions flow to Made-for-Advertising sites designed to trick algorithms, not inform people. We cut the cord on AI-generated waste.

45%

of Budgets Vanish

Legacy verification models miss nearly half of ad fraud because they rely on sampling. We inspect the page to stop the bleeding.

95%

of Users Fear Data Tracking

DeepSee.io validates the page context so you can target relevantly without violating user trust.

DeepSee.io makes the entire ecosystem better.

For Advertisers

Make data-driven decisions that protect your reputation and drive results.

Know the environments your campaigns run in.
Improve the integrity and attention of your supply.

For Agencies

Provide a data-driven experience to clients and ensure compliance with ad-industry standards for MFA and user experience.

Bring observed data into planning and recommendations.
Challenge assumptions with evidence.

For Adtech

Partner with us to access cutting-edge research and insights. Shape the future of responsible, data-driven advertising alongside industry leaders like The Trade Desk and the 4As.