BigSeller is a free mobile application designed specifically for sellers to efficiently manage their orders and inventory across multiple e-commerce platforms. With over 580,000 users in Southeast Asia, it has become a trusted tool for sellers on popular platforms like Shopee and Lazada. The app features new order notifications that help ensure timely delivery, order management tools for processing and shipping, and comprehensive inventory management that allows for real-time stock updates.

Additional features include a scanning function for shipment and order tracking, the ability to send images of packaged items to buyers to reduce disputes, and access to a blog that provides real-time updates on market trends and platform dynamics. The 'Sales Today' feature offers a quick overview of sales performance across multiple stores, enabling sellers to monitor their operations conveniently from anywhere.