Survicate stores a SERVER ID Cookie on visitors browsers. All other data we need to communicate with our database is stored within Local Storage and Session Storage of an active browser.
You can still use Custom Cookie addon in order for Survicate to read the Cookie stored on your website and display it's values in .CSV or .XLS reports.
You can choose to manually generate cookies with Survicate in order to proceed with A/B tests. More on that here.
To read all details about cookies go here.