We built the tool we'd been missing as an agency for years — and ever since it exists, we haven't missed a single OPC login. The internal agency tool turned into Marginly.
We're not tech founders who accidentally built a marketplace tool. We're merchants who turned their own frustration tool into a product.
The Marketplace Guys was founded in 2022 as a response to a very specific problem: we knew the challenges because we'd lived them ourselves. Listing suppressions in the middle of Prime Day, advertising budgets that explode overnight, resellers wrecking the Buy Box and prices. Out of that experience came an agency that doesn't want to consult but to execute operationally — a boutique. Deliberately not the biggest, but the one with the highest impact per client.
Working with brands like Fuchs, Alsitan, Happybrush, Ostmann, Blume Ideal, Vonmählen, AN-Commerce, Green Bean, Terapeak, anders, and Emma & Noah, we learned what D2C brands really need on marketplaces. In 2024, OTTO became our clients' second strategic marketplace. In 2026 we became an official OTTO Service Partner.
And that's exactly where the frustration started: the OTTO Partner Connect (OPC) is pure manual work for Sponsored Product Ads today. No bulk changes. No Excel-ready search-term report. No alerts on anomalies. Anyone running 30 OTTO campaigns for several brands clicks through hundreds of screens per optimization round. What's been the standard on Amazon for years is completely missing on OTTO.
So we sat down and built internally what we needed — first only as an agency tool for our own OTTO accounts. Bulk bid changes, live connection to OTTO, automatic alerts on anomalies, search-term analysis in one click. After a year of internal use it was clear: we're not the only ones with this problem. That became Marginly as rentable software (SaaS) — built by merchants who work with it every day themselves.
The same values that shaped us as an agency — translated into product decisions.
We build features that move the margin — not the headline numbers. Revenue is good. Margin is better. That's exactly why we show true profit per SKU instead of just ROAS.
We've been running OTTO and Amazon accounts daily ourselves since 2020. Every new feature has to pass the test first: would we actually use it in our daily agency work?
Clear outcomes, measurable numbers, transparent reporting. No buzzword bingo, no feature theater. Anything that doesn't show measurable impact doesn't ship.
Both have been standing with both feet in real marketplace accounts for years. If something doesn't work for you in Marginly, the feedback lands directly with the people building the product.
Former Head of E-Commerce at SNOCKS and Oceans Apart — responsible for the Amazon strategy of two of Germany's largest D2C brands across 26 countries. Focus on data-driven growth strategies, PPC management, and operational excellence.
"Results that show up in the P&L — not just in presentations."
Deep expertise in Amazon account management, listing optimization, and internationalization. Has built and scaled brands across multiple EU marketplaces — from clean listings to multi-country rollouts.
"Processes that work — repeatable, scalable, documented."
Behind the scenes: a small, focused team of engineering and account management in Bielefeld.
Other tools are built by tech founders who know marketplace advertising only from the manual. We see daily, with our own eyes, what's actually broken in OPC or Seller Central. Every roadmap decision comes from real account pain.
Helium 10 and SellerBoard are great — for Amazon. For OTTO they're blind. We're not building the 14th Amazon suite, but exactly what OTTO merchants are missing today: bulk changes, automatic alerts, and search-term analysis for Sponsored Product Ads on OTTO Market.
Few features with a lot of impact instead of many features without impact. We don't want to be the biggest OTTO tool — we want to be the one with the most value per user. Every feature has to save one hour of manual OPC work per week, or it doesn't ship.
Our integration is officially reviewed by OTTO and runs through the official OTTO interface. On top of that we're an Amazon Ads Partner — the same care we put into Amazon flows into every Marginly feature.
We work hybrid: engineering and account management on-site in Bielefeld, clients across Germany and Europe. We'd rather hop on a quick screen-share call than open a three-tier support ticket.
These brands are agency clients of The Marketplace Guys — not necessarily Marginly customers. We list them here because they're the reason we know where it really hurts in day-to-day marketplace life.
Marginly is in final beta — join the waitlist to be notified at launch and to lock in founder pricing.
