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Shedding Light on the AdTech Supply Chain

Find out who is selling your inventory

Or Validate Ads.txt

How it works

At the heart of our initiative lies an automated tool that compares ads.txt files with sellers.json and provides simple and useful feedback. We based the tool on our extensive knowledge and experience with the AdTech industry and our passion for transparency.

Gain back control over your ads.txt file

Gain back control over your ads.txt file

Easily see who is really selling your inventory
Validate ads.txt lines provided by new sellers Validate Ads.txt
See how you are doing compared to your competitors and the industry
Learn all you need to know about ads.txt and sellers.json in one place

Industry Highlights

Insights about the state of transparency from 130K websites we crawl

Avg. Number of Ads.txt Lines

Non Existing Seats per domain

Avg. Number of Intermediaries

Number of Sellers per Domain

Number of Ads.txt lines per domain

Golden Rules of Domain Safety

Ads.txt is here to protect you. Misusing it can hurt your revenue.
Cross reference ads.txt and sellers.json. Find out who is tapping into your inventory.
Own your domain. You are the only seller that needs to be listed as DIRECT.
Clean up. Remove lines of partners you are no longer working with.
Run quarterly overall checks. Make sure there are no loopholes.

Find out who is selling your Inventory

Our Partners Are Saying

Ben SoleVP Commercialisation at GAMURS

Sellers.guide helps keep our supply chains safe from fraudsters with its easy-to-use Wizard to clean our ads.txt, saving us a lot of time & resource.

Michael McNallyChief Scientist at HUMAN

Sellers.guide is an awesome tool that walks visitors through IAB’s Transparent Supply Chain, explaining the most common errors and misunderstandings. It can guide participants toward the most profitable and safest use of this vital part of ad tech.

Paul BannisterChief Strategy Officer at CafeMedia

The automation capabilities of Sellers.guide have been a great benefit to our team. It saved significant manual work while helping us solve problems across our business.

Nick FrizzellVP, Marketplace Quality at Magnite

Sellers.guide is a great resource for media owners to maximize their bottom line by pointing out errors and listings that revenue cannot be attributed to.

Steve BoymelVP Business Development at Farlex

Cleaning up our ads.txt was amazingly simple. If you are not using Sellers.guide - you are missing out on an opportunity to protect your brand.

Ayman ChaarHead of Programmatic at ResearchGate

Sellers.guide is a brilliant idea. It saves so much manual work by automating the process and makes it easier to look at the big picture of the supply chain.

Ezra MenagedCEO at Hometalk Inc.

Sellers.guide is an elegant, transparent, and automated solution that sheds light on how ads.txt ought to be handled. Creating simple action items for publishers.