KASM Workspaces is a web-native, container-streamed workspace platform. Combined with Proxmox VE as the IaaS layer, it delivers Linux desktops, Windows RDP sessions, and zero-trust browser isolation — autoscaled, multi-tenant, vendor-independent.
KASM streams containerized desktops, applications, and browsers over HTML5 to any web client. Originally built for browser isolation in security-conscious environments, it now competes directly with Citrix and VMware Horizon for general-purpose VDI — at a fraction of the licensing cost.
Proxmox Server Solutions and KASM Technologies announced an official partnership in 2024 to deliver a full-stack open-source VDI offering. The combination covers everything from the hypervisor layer (Proxmox VE) to the workspace orchestration (KASM), without the complexity of Citrix or the licensing exposure of VMware Horizon.
Architecture stack
Each layer has clear responsibilities. No proprietary glue, no vendor-locked components in between.
Layer 3 — Users
Browsers (Linux · macOS · Windows · ChromeOS)
No client install. Any modern HTML5 browser.
Layer 2 — KASM Workspaces
Workspace orchestration · Identity · Autoscaling
Container-streamed desktops, apps, browsers. SAML / AD / OIDC identity.
Layer 1 — Proxmox VE
Compute · Storage · Networking
KVM/LXC, ZFS or Ceph, SDN. Standard Proxmox cluster.
.svg)
DIE VISION
Sovereignty
No US-vendor dependency, no licensing audits, no Broadcom roadmap risk.
Cost structure
Subscription-based, predictable, fraction of VMware vSphere Foundation cost.
Engineering depth
Open architecture: storage, network, backup all transparent and tunable.
Community-driven
Active development, fast vulnerability response, no closed roadmap.
No vendor lock-in
Standard formats (qcow2, raw), open API, native VMware/Hyper-V import.
Lorem ipsum dolor sit amet, est mollis iuvaret officiis ne, magna idque mentitum ei nec, iisque convenire similique cu sit.
“The combination of precise planning and consistent responsibility enabled us to make a risk-free transition without a fallback environment. Sysfacts proved that the right approach saves costs and ensures quality.”
Thomas Berger
IT manager at a medium-sized manufacturing company
“The combination of precise planning and consistent responsibility enabled us to make a risk-free transition without a fallback environment. Sysfacts proved that the right approach saves costs and ensures quality.”
Thomas Berger
IT manager at a medium-sized manufacturing company
“The combination of precise planning and consistent responsibility enabled us to make a risk-free transition without a fallback environment. Sysfacts proved that the right approach saves costs and ensures quality.”
Thomas Berger
IT manager at a medium-sized manufacturing company
“The combination of precise planning and consistent responsibility enabled us to make a risk-free transition without a fallback environment. Sysfacts proved that the right approach saves costs and ensures quality.”
Thomas Berger
IT manager at a medium-sized manufacturing company
“The combination of precise planning and consistent responsibility enabled us to make a risk-free transition without a fallback environment. Sysfacts proved that the right approach saves costs and ensures quality.”
Thomas Berger
IT manager at a medium-sized manufacturing company
“The combination of precise planning and consistent responsibility enabled us to make a risk-free transition without a fallback environment. Sysfacts proved that the right approach saves costs and ensures quality.”
Thomas Berger
IT manager at a medium-sized manufacturing company
Windows desktops are delivered via RDP-target — KASM provisions Windows VMs on Proxmox and brokers RDP sessions to them in the browser. So yes, full Windows desktops, but Windows itself runs as a normal VM on Proxmox.
KASM has its own Profile Sync mechanism using container persistence. For Windows scenarios that depend deeply on FSLogix today, this is one of the migration assessment items we always cover.
KASM has built-in autoscaling rules — by time of day, by load, by user group. It provisions new workspace instances on the Proxmox cluster and tears them down when load drops. We design the rule set as part of the VDI architecture phase.
KASM uses subscription pricing without per-CCU lock-in. For most environments we see 50–70% TCO reduction over equivalent Citrix licensing, with the largest savings in heavily-licensed Citrix Enterprise scenarios.
© 2026 Sysfacts AG