About Watermouse

Senior expertise.
Without the layers.

Most agencies sell access to a team. Watermouse sells access to the person who actually knows what they're doing.

European eCommerce brands working with large agencies often find themselves briefing junior account managers who brief senior strategists who occasionally show up on quarterly calls. The work that goes into their account — the actual thinking, the daily decisions — happens several rungs below the person they signed with.

Watermouse is built differently. One senior operator, directly responsible for your account, with the experience to match. No handoffs. No layers. No one learning on your budget.

The name

Watermouse is Portuguese for target. Every campaign has one. Every decision points to it. The name is a reminder that paid media without a clear target isn't strategy — it's spending.

Founded in Brazil. Built for Europe. The distance is a feature, not a bug — operating costs stay lean, and that saving goes directly into the quality of work, not agency overhead.
What we believe

Some things worth saying plainly.

01
Performance marketing is a craft, not a template.

There is no playbook that works across every account. What works for a €200 AOV fashion brand in Germany is not what works for a €50 consumable in the Netherlands. Good paid media requires genuine thinking about the specific product, the specific market, and the specific moment — not copy-pasting last quarter's structure.

02
Automation should multiply expertise, not replace it.

Google's machine learning is genuinely powerful. PMax, Smart Bidding, dynamic creative — these tools work. But they work best when someone who understands the underlying mechanics sets them up correctly and monitors them honestly. Automation without judgment produces efficient mediocrity.

03
Reporting should tell you something useful.

A report that shows ROAS went up without explaining why is just noise. Good reporting connects what happened in the account to what's happening in the business — and flags problems before they show up in the numbers your CFO sees.

04
The best client relationships are direct ones.

No account managers between you and the work. No one translating your feedback into a brief. You talk directly to the person running your campaigns. That means faster decisions, fewer misunderstandings, and a working relationship built on actual trust.

How we work

What to expect when you work with Watermouse.

We keep the working relationship simple by design. Fewer moving parts means less friction and more time spent on the work that matters.

01
A proper audit before anything else
Every engagement starts with a thorough review of your Google Ads account — structure, bidding logic, feed quality, attribution, spend efficiency. We tell you what we find honestly, including if the account is in better shape than expected. No upselling problems that don't exist.
02
A strategy that fits your business, not a template
Based on the audit, we build a roadmap specific to your goals — whether that's fixing a structural issue, scaling into new markets, or improving ROAS without cutting spend. You'll know exactly what we're doing and why before we touch the account.
03
Monthly reporting that actually means something
No dashboard dumps. Every month you get a clear summary of what happened, what we learned, and what we're doing next. If something isn't working, we say so. If something is working well, we explain why so you can understand it — not just trust it.
04
Direct access, always
You have a direct line to the person running your account. Not a support inbox. Not an account manager. If something comes up between check-ins — a product launch, a sale, a budget question — you reach out and get a real answer quickly.
The person behind it
Rodrigo Kato
Founder & Senior Performance Marketer

Rodrigo has spent 6+ years running paid media for brands across Europe, the Americas, and beyond — managing multi-million euro budgets and building the kind of performance infrastructure that scales without breaking.

He has worked in-house as a Performance Marketing Manager, led growth teams across distributed markets, and operated as a specialist across the full Google Ads stack: Search, Shopping, PMax, and feed-based automation at scale.

Watermouse is built on that foundation — deep, hands-on experience with the actual mechanics of Google Ads, brought directly to European eCommerce brands that are serious about growth.

Google Ads Shopping & PMax Feed automation Multi-market scaling eCommerce growth 6+ years
Work with us

Start with a free audit.

30 minutes. We look at your actual Google Ads account and tell you honestly what we see — no pitch, no pressure.

Book a free audit
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