Should you build or buy Virtual Desktop Infrastructure (VDI) & Desktop as a Service?
Virtual desktop infrastructure and desktop-as-a-service deliver a full Windows or Linux desktop from a data center or cloud, streamed to any device over a remote protocol. Enterprises with regulated data, contractor fleets, or hardware-constrained users buy it to centralize desktop management and control where data actually lives.
Buy, but re-bid at renewal. Price Azure Virtual Desktop against your Citrix or Horizon quote if you already hold eligible Microsoft licensing, and use Amazon WorkSpaces pools where concurrency is well below headcount. Reserve Kasm or Guacamole for browser-first access, labs and secure gateways rather than as the enterprise desktop platform.
Build it, buy it, or bridge?
When building makes sense
The honest read on open-source VDI is that it covers real but narrower use cases than a full enterprise desktop platform. The City of Hamina runs Kasm Workspaces for browser-centric work and reports a 45% reduction in recurring IT operational costs, moving from dedicated laptops to shared, on-demand container sessions and Chromebooks in place of full Windows desktops. Guacamole runs in production as a protocol gateway at organizations including ESI and HP. What neither tool does well yet is the persistent Windows desktop core: Proxmox's own documentation states that passed-through GPUs cannot display through its console, and Kasm's GPU support is a 2026 addition still maturing. Building clears the bar for kiosk access, secure gateways, labs, and browser-first workflows where more than 85% of the work happens in a browser anyway, which is Kasm's own framing of where it fits. It doesn't clear the bar where users need a full, persistent Windows desktop with profile management and GPU acceleration.
When buying makes sense
The pressure in this category is entirely about which vendor, not whether to buy one. Citrix raised list prices 8% in 2023 and reportedly doubled some partner month-to-month pricing in 2024, and the reaction from its own partner channel was described as stunned silence followed by anger and disbelief, a real sign the incumbent's pricing power was being tested. But the only sizeable documented exits from Citrix went to Azure Virtual Desktop, itself another purchase, not a self-built alternative. AVD access is included with eligible Microsoft licensing, with infrastructure running $20-$60 per user monthly, and Amazon WorkSpaces prices around $44 per machine monthly in AWS's own example. What you're buying is the brokering, profile management, and protocol layer that a persistent desktop needs and that open tools don't yet replicate. Buy, but re-bid at every renewal: price AVD against your current Citrix or Horizon quote, and use Kasm or Guacamole only for the browser-first slice of your fleet.
The desk read
Build-versus-buy analysis for Virtual Desktop Infrastructure (VDI) & Desktop as a Service is being written. In the meantime, the framework that drives every B4 call is on the B4 Index page.
Frequently asked
What is VDI and desktop-as-a-service (DaaS)?
VDI and DaaS deliver a full desktop from a data center or cloud, streamed over a remote protocol, so regulated or contractor-heavy organizations can keep data off local devices. Azure Virtual Desktop and Amazon WorkSpaces bill by consumption, while Citrix and Omnissa sell subscription bundles with per-seat minimums.
Can open-source tools replace a commercial VDI platform?
Only for narrower slices. Kasm Workspaces cut the City of Hamina's recurring IT costs 45% for browser-centric work, and Guacamole runs in production as a protocol gateway, but neither yet matches the brokering, profile management, and GPU support a persistent Windows desktop platform needs.
Why is Citrix pricing under so much pressure?
Citrix raised list prices 8% in 2023 and reportedly doubled some partner month-to-month pricing in 2024, drawing sharp backlash from its own partner channel. But documented customer exits moved to Azure Virtual Desktop rather than a self-built alternative, so the pressure is on vendor choice, not on buying versus building.
What does Azure Virtual Desktop cost compared to Citrix or Horizon?
AVD access is included with eligible Microsoft licensing, with infrastructure estimated at $20-$60 per user per month. Amazon WorkSpaces runs around $44 per machine monthly in AWS's own published example. Re-price your current vendor against these at every renewal.
What are the main VDI and DaaS vendors?
Representative vendors include Citrix DaaS, Omnissa Horizon, Amazon WorkSpaces, Azure Virtual Desktop. B4 Pro includes the category score and the full vendor list.