About csspartner.io

What is csspartner.io?

csspartner.io is a Comparison Shopping Service (CSS), a price comparison service that runs Google Shopping ads on behalf of online shops. It is built for online shops, for agencies that manage shops, and for agencies that want to offer a CSS under their own brand.

You link your Google Merchant Center to our CSS. Your Google Ads account, campaigns, budget and bid strategies stay with you.

Why do you pay less per click through a CSS?

Without a CSS of your own, Google serves your Shopping ads through its own comparison service and keeps a margin on every click. Only 80% of your bid reaches the auction.

A CSS removes that margin: you pay 20% less per click at the same position, or bid 25% more with the same budget. The ad then shows the name of the CSS instead of “By Google”.

This goes back to the European Commission's 2017 decision, which fined Google €2.42 billion for favouring its own comparison shopping service. Since then, independent comparison services bid in the Shopping auction too.

Which countries does the CSS benefit apply to?

The CSS benefit applies in 21 markets in Europe. From September 2026 Google is extending Shopping ads and the CSS programme to more countries; the benefit applies there from each launch date.

Switzerland, Norway and the United Kingdom are not in the EU, and the benefit applies there all the same. One CSS covers every market, so more target countries need no second setup.

What does csspartner.io offer?

The core product is CSS access for online shops; everything else is optional.

• Google CSS: your Shopping ads run through our CSS in every market, with free migration.
• CSS features: Product health explains Google's issues in plain words, the Fix Center suggests fixes you approve, Custom Labels for your price position are suggested to you, and Price benchmarks show your position against Google's benchmarks.
• Click fraud protection: an add-on that detects invalid clicks and bot traffic and blocks them through exclusion lists in your Google Ads account. Up to 20% of clicks come without any intent to buy.
• White Label CSS: agencies offer a CSS under their own brand. We handle the accreditation, the comparison site and Google's requirements; the client relationship and the client price stay with the agency.
• CSS for agencies: individual agency terms on request, depending among other things on the number of Merchant Center accounts managed, with one consolidated monthly invoice and a personal contact. We don't contact the agency's clients.

How much does csspartner.io cost?

Shop plans are charged per domain, White Label per agency. You pay in the currency of the country site you book on.

Every shop plan comes with a 30-day free trial, no setup fee, free migration and monthly cancellation. Campaign management and consulting are not part of the subscription; they are optional and agreed separately.

How does switching to csspartner.io work?

Switching only touches your Merchant Center; your campaigns keep running.

1. 1.You book online and try it free for 30 days.
2. 2.You get an e-mail with a link to a short form: Merchant Center ID, account type (standalone account, multi-client account or sub-account) and the admin e-mail. The account structure decides how the migration is done.
3. 3.We get in touch within 24 hours of your booking.
4. 4.We request the link to our CSS, and you confirm CSS access in your Merchant Center.

Campaigns, bid strategies, conversion data, feeds and ads stay exactly as they are.

What results do merchants get with csspartner.io?

Rebike saves 20% per click with csspartner.io. shop4runners pays around 20% less per click since switching.

Who is behind csspartner.io?

csspartner.io is a brand of UnitedAds GmbH. The company has offices in Berlin and Munich and is registered at the Munich register court under HRB 177123; its managing directors are Philip Thomisch and Alex Sperber.

UnitedAds has run a Google CSS since 2020 and is a Google Partner and a Comparison Shopping Premium Partner 2026. The comparison site of our CSS is UnitedAds Shopping at unitedads.shopping.

How do you reach csspartner.io?

By e-mail at hello@csspartner.io or by phone on +49 175 8180834. Customer support runs by e-mail.

Videos about Google CSS in many languages are on our YouTube channel @csspartner.

Frequently asked questions about csspartner.io