RPost offers registered email services for users to access legal electronic messaging and document services for proof, encryption, e-signatures, and high value collaboration across multiple web-connected devices. Developers can also use RPost's API for data input, feature selection, product delivery, intelligence reporting, and authentication. The API uses SOAP protocol and responses are formatted in XML.
Rpost made its name in the compliance space through its Rpost API and core products: email proof, privacy, and electronic signatures. Rpost’s core offering won a customer list full of household names across many industries, both public and private (Whole Foods, AT&T, and Civpol to name a few). Rpost now aims to bring its compliance strategy to all internet transactions via RPost Cloud.