Box began rolling out Box Sign, its native e-signature capability, to customers on Business and Enterprise plans at no additional cost. With this launch, Box Sign delivers unlimited signatures and a robust set of APIs, enabling businesses to digitize and modernize the way agreements are managed and governed in the cloud. Box acquired SignRequest, a cloud-based electronic signature company, and developed Box Sign on its technology in February. Basic functionality will be included in all Box business plans and advanced features will be available in higher-tier plans.
Source: https://www.helpnetsecurity.com/2021/07/28/box-sign/