How do I sign up for SoFi Relay? February 25, 2020 01:15 You can activate SoFi Relay through your SoFi.com login on the web or in the SoFi mobile app. Click here to 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 accounts can I link? How much does SoFi Relay cost? What is Root Insurance Company?