Flat River Group, a high-performance commerce accelerator and leading distributor in the toys and games category, knew speed was critical in today’s eCommerce landscape—where a single viral video can turn an unknown product into an overnight bestseller. With three distribution centers spanning one million square feet, they help small-and medium-sized brands sell on major marketplaces like Walmart Marketplace without the cost of building their own infrastructure. By partnering with Rithum, Flat River Group rapidly expanded on Walmart Marketplace by leveraging Walmart Fulfillment Solutions.
The goal
Meet shoppers where they are—on Walmart.com
To be agile in responding to the ever-changing channels that consumers use to discover and shop for toys, Flat River Group knew that Walmart Marketplace provided the visibility, vast customer base and fulfillment flexibility they needed. With their mission in mind, they turned to Rithum to help them get on the platform quickly.
Rithum helped Flat River Group:Â
- Expand fully onto Walmart MarketplaceÂ
- Manage listings, pricing and inventory in real timeÂ
- Leverage solutions for first party (1P), third party (3P) and Walmart Fulfillment Services (WFS) salesÂ
- Gain sales flexibility while maintaining brand controlÂ

The challenge
Technical limitations that slowed growth
While Flat River Group already had the category knowledge and supplier relationships to succeed on Walmart Marketplace, they needed support building custom integrations and managing multi-model selling.
To support customer demand in real time, the company needed to make their backend more scalable. Rithum helped them eliminate manual processes and implement accurate listings and inventory updates across Walmart’s retail and Marketplace channels.

The solution
Optimize on Walmart Marketplace
Rithum worked with Flat River Group and Walmart Marketplace team members to centralize their catalog, automate inventory feeds and manage fulfillment utilizing Walmart Fulfillment Services (WFS) and third-party options. Through automating the complexity in their process and utilizing convenient, low-cost fulfillment through WFS, Flat River Group was able to significantly grow their business.
Rithum’s expertise helped Flat River Group streamline their operations, scale their assortment and optimize their reach without relying on multiple systems—all while retaining full control over merchandising across Walmart’s retail models.

We hired Rithum as our strategic partner to do a lot of the heavy lift for us and connect to Walmart’s platform within months.
Kristopher Nickolaus,
Director of Sales, Flat River Group
Future plans
Doubling down on Walmart
Flat River Group is focused on expanding its Walmart strategy even further by exploring new initiatives in international markets and testing emerging social commerce opportunities.