SaaS (software as a service)
SaaS (software as a service) is software used in a browser rather than installed, usually for a monthly or yearly fee.
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Explanation
The provider handles updates, backups and servers. In return the data lives on the provider's servers, so it matters where and how it is stored, and whether it can be taken out.
Most CRMs are offered as SaaS; some can also be installed on your own server.
How HelloTeam does it
HelloTeam runs in the browser with monthly modules; data can be exported to CSV at any time, and installation on your own server is available.