Where video is recorded
VMS (on-premise)
On servers, appliances or recorders at the site
VSaaS (cloud-hosted)
In the provider's cloud, sometimes with a small local buffer
Comparison
VMS vs VSaaS: on-premise video management or cloud surveillance?
Short answer
A VMS is video management software traditionally run on your own servers or appliances, so video is recorded and kept on site. VSaaS is a cloud subscription in which video is streamed to and stored by a provider. An on-premise VMS favors control and low upload bandwidth; VSaaS favors minimal on-site infrastructure. Hybrid models combine both.
Side by side
VMS (on-premise) vs VSaaS (cloud-hosted)
| Dimension | VMS (on-premise) | VSaaS (cloud-hosted) |
|---|---|---|
| Where video is recorded | On servers, appliances or recorders at the site | In the provider's cloud, sometimes with a small local buffer |
| Where the software runs | On infrastructure you own or control | Hosted and operated by the provider |
| Upload bandwidth | Low; video stays on the local network | Higher; recorded video or event clips are uploaded from every site |
| Internet outage | Recording and local viewing continue | Remote access and cloud recording depend on the link; local buffering varies by provider |
| Data control and residency | Video stays on premises under your own policies | Video is held by the provider, in the regions it operates |
| Cost model | Servers, storage and software licenses upfront, often with annual support fees | Recurring subscription, usually per camera, plus upload bandwidth |
| Maintenance and updates | Managed by your team or an integrator, including servers, storage and software | Handled by the provider |
| Multi-site management | Needs a central management layer across sites | Central by design through the cloud portal |
Where the software runs
VMS (on-premise)
On infrastructure you own or control
VSaaS (cloud-hosted)
Hosted and operated by the provider
Upload bandwidth
VMS (on-premise)
Low; video stays on the local network
VSaaS (cloud-hosted)
Higher; recorded video or event clips are uploaded from every site
Internet outage
VMS (on-premise)
Recording and local viewing continue
VSaaS (cloud-hosted)
Remote access and cloud recording depend on the link; local buffering varies by provider
Data control and residency
VMS (on-premise)
Video stays on premises under your own policies
VSaaS (cloud-hosted)
Video is held by the provider, in the regions it operates
Cost model
VMS (on-premise)
Servers, storage and software licenses upfront, often with annual support fees
VSaaS (cloud-hosted)
Recurring subscription, usually per camera, plus upload bandwidth
Maintenance and updates
VMS (on-premise)
Managed by your team or an integrator, including servers, storage and software
VSaaS (cloud-hosted)
Handled by the provider
Multi-site management
VMS (on-premise)
Needs a central management layer across sites
VSaaS (cloud-hosted)
Central by design through the cloud portal
Decision guide
Which should you choose?
Choose an on-premise VMS if…
- Video must stay on site for policy, privacy or data-residency reasons
- Sites have limited, costly or unreliable upload bandwidth
- You run many high-resolution cameras per site
- You want AI video analytics on every camera without uploading streams
Choose VSaaS if…
- Sites are small, with a handful of cameras each
- Upload bandwidth is plentiful and reliable
- You prefer a subscription with no servers to run
Consider a hybrid if…
- You want video kept on site but managed centrally across many locations
- You need central health, alerts and configuration without uploading raw video
OrionAlerts
Where OrionAlerts fits
OrionAlerts is not a VSaaS. It is on-premise first: in the standard deployment, video and AI inference stay on an on-site Nebula OS node next to the cameras.
For multi-site estates, Orion Cloud synchronizes health status, alerts, configuration and operational metadata for a central command view, without requiring raw video to be uploaded. That gives the central management of a cloud service while video stays where it is recorded.
FAQ
VMS vs VSaaS: common questions
Is VSaaS cheaper than an on-premise VMS?
It depends on the estate. VSaaS replaces upfront servers with a recurring subscription and adds upload bandwidth costs. An on-premise VMS usually costs more upfront, for servers, storage and licenses, often with annual support fees, but has no cloud storage charges. Compare total cost over the system's expected life, not just the first year.
Can a VMS be managed from the cloud?
Yes. Hybrid designs keep recording on site and add a cloud layer for remote access and central management. OrionAlerts works this way: video stays on the on-site Nebula OS node, and Orion Cloud synchronizes health status, alerts, configuration and operational metadata so every site can be managed from one view.
Does VSaaS work with existing cameras?
Sometimes. Some VSaaS services connect existing ONVIF or RTSP cameras through an on-site gateway or bridge; others work only with their own cloud-connected cameras. Even where existing cameras are supported, upload bandwidth per camera often limits resolution or frame rate, so check compatibility and bandwidth per model with the provider.
Talk through your architecture
We will look at your sites, cameras and connectivity and show how Nebula OS would be deployed.