There is a twitter account where we will post about any unexpected incidents or information about planned downtime. We will have a proper status page in the future.
We make frequent backups of all encrypted data and we have a regular, independent, weekly backups from our server provider.
You can also make your own backups with various Export features.
We designed Contact Cache to work offline from the very beginning so that you can work uninterrupted even if our servers are down or you happen to work in an area without Internet connection.
We will measure the service uptime in the future and share the results on a status page.