What is Desktop as a Service (DaaS)?

Desktop as a Service (DaaS) means your desktop operating system runs on a provider's compute in a data centre, and you interact with it over the network from whatever device is in front of you. The provider owns the servers, the virtualisation layer, the streaming pipeline, and the patching of the hosting infrastructure. You get a desktop that is persistent, follows you between devices, and bills as a service rather than as a capital purchase.

The key shift from a local PC is that the compute and the data live in a region you choose, not on the device. The device becomes a viewport; the desktop is elsewhere and streamed to you. That is the entire model.

• Provision: a desktop instance is created on managed compute in a region. With SisiDesk this is a full desktop, not a shared session, and it persists between connections.
• Stream: when you connect, the instance's display is encoded and streamed to your browser. Your keyboard, pointer, and audio inputs travel back to the instance in real time.
• Compute: the instance runs your applications locally to itself — the work happens on the provider's CPU and GPU, not on your device. Your device only decodes the picture.
• Persist: when you disconnect, the desktop state is preserved. Ghost Sync captures your open apps and layout so the next connection resumes where you left off, even from a different device.
• Bill: you pay for the compute while the session is active. Idle desktops incur storage, not compute, which is what makes metered DaaS cheaper than always-on VDI for variable workloads.

These three terms overlap but point at different ownership boundaries:

• Remote desktop: a protocol for viewing and controlling a computer over the network. It is a technology, not a delivery model — you can remote-desktop into a PC under your desk or a server in a data centre.
• VDI: virtualised desktops on infrastructure you own and operate. You run the hypervisor, license the broker, patch the images, and size for peak. It is DaaS's on-premises predecessor.
• DaaS: the same virtualised-desktop concept, but the hosting layer is operated by a provider and billed as a service. You never touch the hypervisor or the broker.

The practical difference between VDI and DaaS is who runs the plumbing. For the full cost and capability comparison, see cloud desktop vs. VDI.

DaaS pricing falls into two families, and which one a provider uses changes the economics dramatically:

• Per-seat per month: a fixed price per user. This mirrors VDI's fixed cost and is predictable, but you pay the same whether the user works 4 hours or 40 hours a week. It overcharges light users and undercharges heavy ones.
• Per compute-hour (metered): you pay for the time a session is actually active. This is cheaper the moment seat utilisation is variable — contractors, part-time roles, hybrid schedules, seasonal peaks — because idle desktops cost storage, not compute.

SisiDesk uses per-minute metering, the metered end of the spectrum, because it aligns the bill with actual use. For a team whose seat count or hours vary, metered DaaS is almost always cheaper than fixed per-seat VDI or per-seat DaaS once the hidden VDI cost terms are counted.

• Your team is distributed or hybrid, and users need the same desktop from home, office, and travel without syncing files or re-installing apps.
• You on-board contractors or short-term staff frequently and need their desktop ready in minutes, not a provisioning ticket that takes a week.
• Your headcount or hours vary, making fixed per-seat pricing wasteful.
• You need GPU compute for design, rendering, or engineering work, but not continuously enough to justify owning GPU hardware.
• Your endpoint policy favours keeping data off devices — a streamed DaaS desktop never writes data to the local device.

• Air-gapped or strictly on-premises requirements where compute cannot leave a facility you control. DaaS places compute in a provider region.
• A single fixed workload on a dedicated workstation that runs 24/7 — a local workstation or owned VDI may be cheaper at very high, very steady utilisation.
• Environments where the network path is too unreliable for a streamed session and there is no option to place a region nearby.

Most DaaS products require a client application on each endpoint. A browser-delivered DaaS product — what SisiDesk is — removes that requirement entirely: the desktop streams to a browser using the same WebRTC media pipeline a native client uses, with negligible added overhead. The practical effect is that on-boarding a user is sending them a URL, not provisioning a client.

For why that streaming pipeline does not add meaningful latency, see the remote desktop latency guide; for getting peripherals like webcams into the remote desktop, see the webcam passthrough guide.

What is Desktop as a Service (DaaS)?

Desktop as a Service is a cloud delivery model where a full desktop operating system runs on managed compute and is streamed to a user over the network, rather than running on a local PC or on virtualisation infrastructure you own. The provider handles the compute, storage, streaming, and patching of the hosting layer; the user gets a desktop that follows them to any device.

How is DaaS different from VDI?

VDI (Virtual Desktop Infrastructure) virtualises desktops onto servers you own or operate, so you manage the hypervisor, licensing, broker, and patching. DaaS moves that entire hosting layer to a provider and bills it as a service — typically metered. In short, VDI is infrastructure you run; DaaS is infrastructure you rent. See the cloud desktop vs. VDI comparison for the full cost breakdown.

Do I need to install software to use a DaaS desktop?

It depends on the provider. Traditional DaaS requires a client application on each endpoint. A browser-delivered DaaS product like SisiDesk needs only a browser — there is no client to install, provision, or patch, which is what makes BYOD and contractor onboarding instant.

Is DaaS secure?

DaaS can improve security over local endpoints because the desktop and its data live on managed compute in a region you choose, not on a laptop that can be lost. Data never touches the endpoint device in a streamed model. Security depends on the provider's isolation, encryption in transit, and access controls — review the provider's security posture before adopting.

What does DaaS cost?

DaaS is usually billed per user per month or per compute-hour. Per-seat pricing mirrors the fixed cost of VDI; metered per-hour pricing bills only for active session time, which is cheaper when seat utilisation is variable. SisiDesk uses per-minute metering so you pay for compute only while a session is running.

Send your team size, peak concurrency, and whether you need GPU instances to deals@sisidesk.com and we will return a metered DaaS estimate against your current per-seat or VDI run-rate.