Get more out of every euro you spend on Google Shopping.
Adstomars is officially authorized by Google to operate as a Comparison Shopping Service. We run your Shopping Ads in a smarter, more efficient way — so your budget works harder than it ever did before.
Google Shopping is more open than you think.
Google Shopping isn’t just one platform — it’s an ecosystem. European regulation requires Google to allow independent Comparison Shopping Services to compete in the same ad auction as Google’s own system. That’s where we come in.
As an authorized CSS, Adstomars can publish your product ads directly in Google Shopping on your behalf. You keep full control of your Google Ads and Merchant Center account — we simply act as the approved intermediary that gives your campaigns a structural edge.
Choose the intermediary that bids smarter.
If you advertise through Google directly −30%
With Adstomars as your CSS 100%
When you advertise through Google directly, you’re leaving money on the table.
By default, when merchants run Shopping campaigns through Google’s own system, a portion of every bid is retained before it even enters the auction. That means your budget isn’t fully working for you — part of it never reaches the competition.
It’s not a bug. It’s just how the system is built. But there’s a better way.
With Adstomars as your CSS, your full bid enters the auction.
When you run Shopping campaigns through our CSS, your entire budget goes directly into the bidding process — nothing held back. More impressions, more clicks, lower cost per acquisition. Without spending a single euro more.
It works with both standard Google Shopping campaigns and Performance Max. Nothing changes on your end.
Five reasons merchants switch to Adstomars.
Lower CPC
Your cost per click drops because your full budget enters the auction — giving you a real edge over competitors who haven’t made the switch.
More reach, same budget
With greater bidding power, your ads show up more often, to more people, without increasing your spend.
Shopping & Performance Max
Whether you’re running standard Shopping campaigns or Performance Max, the advantage applies across the board.
Zero disruption
We handle the entire migration. Your campaigns don’t pause, your data stays intact, and your team doesn’t need to do a thing.
EU & UK-wide coverage
Authorized to operate across European markets (including UK), so your campaigns scale without limits.
Results from day one
Most of our clients see the difference from the very first month. No long contracts, no setup fees, no surprises.
Three steps to smarter Shopping ads.
Onboarding takes under 48 hours. No code, no campaign pauses, no headaches.
Connect
We link your Google Merchant Center to our authorized CSS. Quick, clean, no technical headaches on your side.
~15 min · zero downtimeLaunch
Your campaigns keep running without a single interruption. Nothing changes for your team — same dashboards, same workflows.
Day 1 · seamless handoverGrow
From the very first click, your full budget is working for you. More visibility, lower costs, better results.
Month 1 · measurable liftReady to make your Shopping budget work harder?
Most of our clients see the difference from the very first month.
Let’s talk about what CSS can do for your business.