LeadBox is a web-based tool designed for businesses in Cameroon that sell to other businesses. Its primary function is to generate targeted call lists by allowing users to select a type of company and a Cameroonian city. The search returns a list of named businesses with their neighbourhood and phone number, which can be exported to Excel or copied as a WhatsApp list. Searches can be performed without creating an account, and the service is free to start, with no card required. LeadBox is not a consumer directory; it is intended for users whose customers are organisations, not for finding restaurants or household services. The tool includes several features to support direct sales workflows. Each row in the results is callable, meaning every entry includes a phone number. Some businesses carry ratings, and results can be displayed on a map, but both features are intended to help users prioritise which companies to call first. Users can also mark entries as checked or contacted, which helps track progress between visits. The interface is designed for mobile phone use, and the results screen focuses on the list rather than a map. In addition to call lists, LeadBox can send a limited number of follow-up emails per day from the user's own address. Typical use cases include a communications agency in Douala needing a list of twenty companies to pitch, a cleaning product supplier wanting every hotel and clinic in Kribi and Limbé on one sheet, a solar installer working neighbourhood by neighbourhood through schools and clinics, or a software team needing per-city call lists with contact history. The workflow is straightforward: choose a company type and city, review the generated list, export it to Excel or WhatsApp, and work through the entries while tracking which ones have been contacted.