Update USERS.md
Summary: Closes
@@ -63,6 +63,10 @@ Using Relay in your production app? If you'd like to add your team to the list,
- [Reploy](https://reploy.io)
- [re:Culture](https://reculture.us)
+## S
+
+- [Sainsburys](https://sainsburys.co.uk/)
+
## T
- [ThoughtMachine](https://thoughtmachine.net/)
