For customers, SaaS means no installation, automatic updates, and access from anywhere, in exchange for an ongoing fee rather than a one-time purchase. For the business selling it, it means recurring revenue and one central product to maintain rather than many installed copies.
Building a SaaS product means building a web app plus the business layer around it: sign-ups, subscriptions, billing, and different plans. That business layer is often as much work as the core features, which is why SaaS builds are substantial projects.
Updated July 2026