Citrix
Virtualization and remote desktop software company
Citrix is a company that makes virtualization and remote access software, best known for products that let employees access a full desktop environment or specific applications remotely from any device, with the actual computing happening…
Definition
Citrix is a company that makes virtualization and remote access software, best known for products that let employees access a full desktop environment or specific applications remotely from any device, with the actual computing happening on a centralized server rather than the local machine. Its technology underpins many enterprise remote-work and secure-access deployments, streaming a virtualized Windows desktop or application over the network so sensitive data and processing stay on managed infrastructure rather than an employee's local device.
Overview
Citrix built its core business around a problem that predates modern remote work trends by decades: organizations needing to give employees access to centrally managed applications and desktops from locations or devices the IT department doesn't fully control. Its foundational technology, application and desktop virtualization, runs the actual operating system and applications on a server in a data center, then streams only the screen output and captures the user's keyboard and mouse input, so the end device is essentially a thin display terminal regardless of whether it's a laptop, a tablet, or a lightweight thin-client machine. Mechanically, Citrix's virtualization platform, historically called XenApp and XenDesktop and now consolidated under the Citrix DaaS and Citrix Virtual Apps and Desktops branding, uses a remote display protocol, HDX, to compress and transmit screen updates efficiently even over constrained network connections, while keeping the actual application data and processing on the server side. This architecture means a lost or stolen laptop doesn't expose sensitive data, since the data never actually resided on the device, only its screen representation did. Citrix's networking products, including its application delivery controller technology, layer load balancing and secure remote access on top of this, controlling how user sessions are routed to available server capacity and enforcing access policies before a connection is even established. Within virtualization and remote access, Citrix's primary competitor is Microsoft, whose own virtual desktop offerings, including Windows 365 and Azure Virtual Desktop, have increasingly encroached on territory Citrix once had largely to itself, particularly as Microsoft bundles virtual desktop capability more tightly with its broader cloud and productivity offerings. VMware's Horizon product is another direct competitor with a similar virtualization approach. Citrix has responded by emphasizing its multi-cloud flexibility, supporting deployment across different cloud providers and on-premises data centers rather than being tied to a single cloud vendor's infrastructure. In practice, organizations with strict data security or compliance requirements, such as healthcare, financial services, and government agencies, use Citrix to ensure sensitive data never leaves controlled infrastructure even as employees work from varied locations and personal devices. Companies with legacy Windows applications that are difficult to modernize also use Citrix to extend the useful life of those applications, delivering them to modern devices, including devices that couldn't otherwise run the underlying application natively, without rewriting the software itself. The trade-offs include the infrastructure cost of running centralized server capacity to host all these virtual sessions, and end-user experience depends heavily on network latency and bandwidth, since a poor connection directly degrades the responsiveness of every remote-streamed interaction. As cloud-native and browser-based application delivery has matured, some organizations use Citrix's approach selectively, for specific legacy applications or high-security use cases, rather than as the default access method for all applications.
Key Features
- Server-hosted virtual desktops streamed to any endpoint device
- HDX remote display protocol optimized for constrained networks
- Application virtualization delivering individual apps without local install
- Application delivery controller for load balancing and secure access
- Multi-cloud and on-premises deployment flexibility
- Centralized data storage that never resides on end-user devices
- Session policies enforcing access control before connection
- Support for legacy Windows applications on modern endpoint devices