How is Gridsync related to S4? Anamika October 20, 2017 10:48 Updated Gridsync is a new cross-platform desktop application, which provides a graphical user interface (GUI) to S4. Related articles What does Gridsync provide to S4 customers? What is the relation between Tahoe-LAFS and Gridsync? What is an “invite code” and what is it used for? Can I pay with bitcoin? How do I get started with Gridsync? Comments 0 comments Please sign in to leave a comment.