Help online sellers see what works before they spend
SellWinners shows online sellers, media buyers and agencies which stores, products and ads are working, so a launch or a campaign starts from evidence instead of guesswork.
The market already shows what works
Launching a product or a campaign costs money, and most of what you learn arrives after you have spent it. Yet the answers are in plain sight: the stores that grow, the products they sell, the ads brands keep running and the emails they send.
SellWinners brings that market together in one place, so you can study what works before you commit a budget.
One place to study stores, products, ads and emails
Ads
Ads on Meta, Google, YouTube and TikTok, with their creatives and copy.
Shopify stores
Shopify stores with their traffic, products, ads and tech stack.
Products
Store products with their prices and sales estimates, to see what sells.
Brand emails
The emails brands send, by campaign type, promotion and event.
Brand tracker
Follow the brands you care about and see how their ads change over time.
Boards
Save ads, shops and emails to boards and share them with a link.
In the browser, in your code or through your AI assistant
Web app
Search, filter and compare in the browser, then save what you find.
REST API
The same data in your own tools, scripts and products, with an API key.
MCP for AI assistants
Connect Claude, Cursor, VS Code or another AI assistant and ask it about stores, products and ads.
What each plan includes is on the pricing page.
How we work with data
Refreshed regularly
The SellWinners index of stores, products, ads and brand emails is refreshed regularly.
Estimates, labelled
Figures a store doesn't publish, such as its sales and revenue, are estimates, and they are labelled as estimates wherever they appear.
Your call
We show the evidence; you decide what to launch, test or scale.
Who runs SellWinners
SellWinners is operated by KOKORIKO SAS, 6 rue d'Armaille, 75017 Paris, France.
The Terms of Service and the Privacy Policy say how we work with you and your data. To reach us, use the contact page.
See what's winning in your market
Search Shopify stores and Meta ads for free. The Free plan includes the web app and the MCP server (150 credits a month), without the API. Paid plans add every dataset and the API, with more credits.