Glossary

SaaS

Software-as-a-Service — software delivered over the web on a subscription.

Definition

SaaS replaces installed software with services accessed through a browser or thin client. The provider runs the servers, applies the updates, and bills monthly. Examples include Gmail, Slack, Dropbox, Salesforce, and most modern productivity tools.

For users, SaaS removes maintenance overhead but adds vendor lock-in and data-residency considerations. For businesses, SaaS sprawl — many tools, many credentials, many places customer data lives — is a leading cause of breaches.

Example

Instead of buying a copy of Microsoft Office to install, your team uses Microsoft 365 in the browser. Files live in OneDrive; collaboration happens in Teams; the IT team manages access through one identity provider.

Frequently asked questions

Where does my SaaS data live?

On the provider's servers, often in multiple regions. Each provider's privacy policy and data-processing addendum spell out the details.

Can I take my SaaS data out?

Most reputable providers offer export. Check before you commit, especially for high-volume or specialized tools.