Head-to-Head: Plugable TBT4-UDZ vs. CalDigit TS4

Choosing the right docking station can have a major impact on how smoothly your workstation, hotdesk, or managed laptop fleet performs. Today, we’re comparing two established Thunderbolt 4 docks: the Plugable TBT4-UDZ and the CalDigit TS4.

At first glance, these docks may appear similar: both offer a Thunderbolt 4 connection, 98W of certified or rated laptop charging, 2.5 Gigabit Ethernet, and UHS-II SD and microSD card readers. But a closer look shows that they are built around different priorities. The Plugable TBT4-UDZ is designed around conventional HDMI and DisplayPort setups, including three to four display Windows workstations. The CalDigit TS4 prioritizes downstream Thunderbolt expansion, USB-C monitors, and uniformly fast USB connectivity.

The core question is: which dock is better suited for your specific power user workflow? Let’s compare the specifications, then look at what those differences mean in day-to-day use.

Feature Comparison: Plugable TBT4-UDZ vs. CalDigit TS4

Where the CalDigit TS4 May Be a Better Fit

If your setup depends on downstream Thunderbolt expansion, the TS4 offers benefits worth considering. It features two downstream Thunderbolt 4 ports, which are excellent for users who need to daisy-chain high-speed Thunderbolt storage arrays, professional USB-C displays, or specialty hardware.

Additionally, the TS4 offers uniformly fast 10Gbps speeds across all eight of its USB data ports, stronger 20W peripheral charging on the front USB-C port, and dedicated rear audio-in and audio-out jacks for complex audio environments. That said, those advantages come with trade-offs. For users who need maximum external displays or want to avoid buying extra video adapters, the Plugable TBT4-UDZ offers a more flexible path.

The Plugable TBT4-UDZ Advantage

Display Support: More Room to Work

Display count is the TBT4-UDZ’s defining advantage. On a qualifying Windows Thunderbolt 4, Thunderbolt 5, or USB4 system, the TBT4-UDZ can drive up to four extended 4K displays at 60Hz. It achieves this natively through the dock’s built-in DisplayPort Multi-Stream Transport (MST) hardware, without relying on additional software.

For a validated Windows workstation, this is a meaningful productivity boost—especially useful for financial analysis, software development, and content review workflows that benefit from a massive amount of screen real estate.

Because of native macOS limitations, Mac users will be limited to two external displays on both docks. It is important to note that each monitor must be connected to separate “Display Groups” on the back of the TBT4-UDZ dock for both monitors to be extended in macOS.

Simpler Desk Setup

Built-in HDMI and DisplayPort outputs can reduce the need for extra adapters, which simplifies setup and removes another potential point of failure. The TBT4-UDZ includes two HDMI 2.0 ports and two DisplayPort 1.4 ports, allowing a conventional double, triple, or quad-monitor setup to connect directly to the dock.

By contrast, because the CalDigit TS4 relies heavily on its downstream Thunderbolt ports for video output beyond a single DisplayPort connection, connecting standard HDMI monitors requires the purchase of separate active USB-C to video adapters. The TBT4-UDZ avoids this friction entirely.

Better Expansion for Daily Work

While the TS4 offers more consistent USB speeds, the TBT4-UDZ provides one more USB-A connection (six total vs. five). This helps reduce the need for external hubs in workplaces that still rely heavily on conventional USB-A accessories like keyboards, mice, webcams, and printers. Furthermore, a standard, replaceable 1.0m host cable is included with the TBT4-UDZ, making it easier to choose a different placement on your desk compared to the TS4's shorter 0.8m cable.

Support and Peace of Mind

A docking station is a daily-use part of the workspace, so support matters after the purchase. The Plugable TBT4-UDZ includes a two-year limited warranty, adding peace of mind for users who depend on their dock every day. Plugable also backs its products with accessible support resources, including product documentation, knowledge base articles, FAQs, community resources, and direct support options to help users troubleshoot setup questions after purchase. Plugable’s Watts AI is available as a self-serve support option for quick troubleshooting guidance and product questions.

Final Decision

Both the Plugable TBT4-UDZ and CalDigit TS4 are capable Thunderbolt 4 docking stations, but they are built around different priorities. The CalDigit TS4 may be the better fit if your workstation requires downstream Thunderbolt ports for daisy-chaining storage, direct connection to Thunderbolt monitors, or maximum USB-C data and charging speeds.

For users who need three or four external 4K monitors on a Windows system, adapter-free HDMI and DisplayPort connections, and extra legacy USB-A ports, the Plugable TBT4-UDZ is the stronger choice. It is especially useful for productivity-focused power users and mixed-device environments where setup simplicity and dependable support matter as much as the spec sheet.