Starting this month, all new customer accounts will be using Cumulocity 7. Cumulocity 7 is fully compatible with Cumulocity 6 and prior versions, so all existing applications and devices continue to run on Cumulocity 7.
If you have an existing account on Cumulocity, you can contact firstname.lastname@example.org for migrating it to Cumulocity 7. All data will be preserved during migration. There may be a small maintenance period during switching your account.