
Top Ecommerce Companies in the USA: The 100 Brands Winning the Traffic Race in 2026

Calling all ecommerce pros: online retail is changing fast, but you need to move even faster.
Do you spend your time optimizing retail media, analyzing Amazon search share, or streamlining your category structure?
Then you know the clock is ticking⏰.
The latest updates to Similarweb Retail Intelligence are your new competitive edge. Work smarter, uncover opportunities, and grow revenue faster than ever before.
From a redesigned homepage to API access and keyword insights, here’s what you need to know about these improvements and what they do.

For ecommerce and marketplace teams, simply knowing that a product is performing isn’t enough. Understanding why is the difference between staying ahead and falling behind.
With child ASIN-level API access, you can now:
Why it matters: These insights aren’t just data points; they’re your roadmap to fine-tuning assortment, reacting instantly to shifts in demand, and proving ROI at the individual product level. Don’t get left behind – every detail counts.
👉 Explore all the Shopper datasets in the Exporter ➝

While things might seem quiet on the surface, they are actually moving fast. Ecommerce is like that. And when you’re juggling retail media, pricing, and competitor tracking, you need to know what’s happening now.
Our redesigned Shopper homepage helps you to:
Why it matters: This isn’t just an aesthetic update; it’s a strategic advantage. Use your homepage to swiftly move from data to actionable insights, trimming precious time from your workflows. Spend less time searching and more time optimizing, and do it before competitors do.
👉 Start exploring the new homepage ➝

Amazon’s built-in taxonomy rarely reflects how your brand structures SKUs or how shoppers truly browse. This misalignment costs you time and insights. Now, you’re in complete control.
With Custom Categories, you can:
Why it matters: Say goodbye to endless Product Groups and ASIN Lists. The increased flexibility of custom categories saves you hours, creates reporting that truly fits your business, and helps you identify opportunities that others miss.
👉 Start building smarter categories ➝
Retail media budgets are too valuable to waste. If you’re not connecting your paid strategy to actual performance, you’re leaving money on the table. With our Amazon Search Share insights, you can finally close that gap.
Here’s what you can do:
Why it matters: Increase visibility, eliminate wasted spend, and plan campaigns that actually convert. The data is clear. Are you ready to act on it?
👉 See who’s winning the search game ➝
Shoppers don’t think in silos, and neither should your strategy.
In this on-demand webinar, see how brands are using cross-retail insights to unify decision-making across Amazon, Walmart, and beyond.
This is what you’ll come away with:
Why it matters: By seeing the whole picture, you can make decisions that reflect the full scope of shopper behavior, not just one platform’s data.
👀 Watch the webinar on demand 👇
Every update is now live inside Shopper. Whether you’re refining your keyword strategy, creating more meaningful categories, or speeding up reporting, everything is built with one goal: to help ecommerce teams stay ahead.
👉 Start exploring your category ➝
With Similarweb Retail Intelligence, you can turn marketplace data into action. No more blind spots. No more delays. Just smarter, faster decisions, and unmatched results.

Team Manager, Content Marketing
James is an former journalist & content strategist in B2B tech, who has previously created content for companies like EDF and X (Twitter). He also has a journalism post-grad from LCC.
Give it a try or talk to our insights team — don’t worry, it’s free!