How do I sign up for SoFi Relay? December 18, 2020 05:08 Updated You can activate SoFi Relay through your SoFi.com login on the web or in the SoFi mobile app. Register to get started and access SoFi Relay from the web. Related articles Is my information protected? Who can see my information? What are the benefits of SoFi Relay? What accounts can I link? What is SoFi Relay? How much does SoFi Relay cost?