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 What are the benefits of SoFi Relay? Is my information protected? Who can see my information? What is SoFi Relay? What accounts can I link? How much does SoFi Relay cost?