SaaS (Software-as-a-Service) is a software delivery model where applications are hosted in the cloud and accessed by users via the internet. Instead of installing software locally, users subscribe and access it through a browser or API, with providers handling infrastructure, updates, and security.
CRM platforms (e.g., Salesforce), project management tools (e.g., Trello), email marketing software (e.g., Mailchimp), and collaboration apps (e.g., Slack) are all SaaS products.