Video Surveillance as a Service (VSaaS) is cloud-hosted surveillance sold as a subscription. Instead of buying and running your own VMS servers, cameras (or a small on-site bridge) connect to a provider's cloud, which records the video, runs analytics, and serves live and recorded footage to a browser or app. The provider owns the infrastructure, updates, and uptime; the customer pays per camera per month.
The appeal is the cost shape and the operations. VSaaS turns a large up-front CapEx (servers, storage, integration) into a predictable OpEx subscription, and it removes server maintenance, patching, and capacity planning from the customer's plate. Most serious VSaaS uses a hybrid pattern: a local bridge or smart camera buffers full-resolution video on the edge and uploads thumbnails, metadata, and clips on demand — Verkada and Eagle Eye Networks work this way — cutting sustained upload to as little as tens of kbps per camera.
The pitfalls are bandwidth and data control. Continuous full-resolution upload can exceed a site's outbound link, which is why the edge-buffer pattern exists; cloud egress and retrieval fees can surprise; and where the footage physically lives raises data-residency and cross-border questions (GDPR Chapter V) that an on-prem system never faces.
