Thunderbolt 4 docks look similar on the box: 40Gbps uplink, dual 4K at 60Hz, and roughly 100W of Power Delivery back to the laptop. The CalDigit TS4 and the Plugable TBT4-UD5 both clear that bar. The split is ports, video connectors, Ethernet speed, and how much you pay for the extras.
This is a two-product head-to-head, not another dock roundup. For the wider field (StarTech, Anker, and USB4-labeled options), see The Best Thunderbolt 4 and USB4 Docks in 2026. Specs below come from manufacturer listings and that buying guide. No fake.
| Attribute | CalDigit TS4 Thunderbolt 4 Dock | Plugable Thunderbolt 4 Dock (TBT4-UD5) |
|---|---|---|
| Rating | 4.1 | 4.3 |
| Price | $379.99 | $199.95 |
| Connection | Thunderbolt 4 (40Gb/s) | Thunderbolt 4 (40Gb/s) |
| Power Delivery to laptop | 98W | 100W (96W certified) |
| Total ports | 18 | — |
| Display support | Dual 4K 60Hz / 8K 30Hz / dual 6K 60Hz (via DisplayPort + TB4) | — |
| Ethernet | 2.5GbE | Gigabit (1GbE) |
| Cable | 0.8m TB4 certified, included | — |
| Display outputs | — | 2x HDMI 2.0 (dual 4K 60Hz or single 8K) |
| USB | — | 1x downstream TB4, 1x USB-C, 4x USB-A |
| Card reader | — | SD + microSD |
| Buy | View on Amazon | View on Amazon |
Quick verdict
Most people who need a real Thunderbolt 4 dock should buy the Plugable TBT4-UD5. It is roughly half the CalDigit price, ships with two native HDMI 2.0 ports for dual 4K60, and still charges a laptop at about 96W to 100W. Pick the CalDigit TS4 when you want the deepest port set (18 ports, three downstream Thunderbolt 4), 2.5GbE, and dual 6K headroom, and you are willing to pay for DisplayPort outputs instead of HDMI.
Price and value
Winner: Plugable TBT4-UD5. Street price sits near $200 for the Plugable versus about $380 for the TS4. Both are Intel-certified Thunderbolt 4 docks with dual 4K60 and high-wattage host charging. The CalDigit premium buys more downstream Thunderbolt ports, 2.5GbE instead of Gigabit, an aluminum chassis, and a denser USB mix. If your checklist is "one cable, two 4K screens, keep the laptop charged," the Plugable closes that job at a much lower total.
Ports and layout
Winner: CalDigit TS4. The TS4 advertises 18 ports: three downstream Thunderbolt 4, three USB-C, five USB-A (10Gb/s), DisplayPort, 2.5GbE, SD/microSD, audio, and a front-facing cluster for day-to-day plugs. The Plugable is still generous (downstream Thunderbolt 4, USB-C, four USB-A, dual HDMI, Gigabit Ethernet, SD/microSD, audio, front power button), but it does not match CalDigit's downstream Thunderbolt count or USB-A density. If you chain a Thunderbolt SSD RAID, a capture device, and a second dock-class peripheral, the TS4 leaves more native 40Gbps lanes free.
Displays and video outs
Winner: depends on your monitors. The Plugable puts two HDMI 2.0 ports on the chassis, so dual 4K60 HDMI monitors need no adapters. The CalDigit leans on DisplayPort plus Thunderbolt video paths and can push dual 6K at 60Hz or dual 4K / 8K30 depending on host and cable. HDMI-only desks favor Plugable out of the box. DisplayPort panels, higher-resolution Mac Pro / Studio-class setups, or dual 6K ambitions favor the TS4 (plus a cheap HDMI adapter if you still need one HDMI panel).
Neither dock overrides a laptop's external-display ceiling. Base M1, M2, and M3 MacBooks still drive one external display over Thunderbolt. For a second independent panel on those chips, you need DisplayLink, which is a different product class than these native Thunderbolt docks.
Power Delivery to the laptop
Winner: tie, with a slight edge to Plugable for the brick. Both target the ~100W class. CalDigit rates 98W to the host. Plugable lists up to 100W from its 135W brick with 96W certified. Either number covers most ultrabooks and many 14-inch creator laptops. A 16-inch workstation under heavy CPU plus GPU load can still outrun a dock. Read the "to host" figure, not only the wall-brick wattage, and keep the OEM charger nearby for sustained peak work.
Networking
Winner: CalDigit TS4. The TS4 includes 2.5GbE. The Plugable is Gigabit (1GbE). On a multi-gig ISP plan, a 2.5GbE NAS, or a 2.5GbE switch uplink, CalDigit avoids a USB Ethernet dongle. For ordinary 300 to 940 Mbps home fiber, Gigabit on the Plugable is enough and one less reason to pay the TS4 premium.
Build, cable, and desk footprint
Winner: CalDigit for materials; Plugable for HDMI simplicity. CalDigit ships an aluminum body and a short 0.8m Thunderbolt 4 cable; reviewers and listing copy lean on thermals and longevity. Plugable uses a wider horizontal plastic chassis with a front power button that cuts peripheral power without unplugging the host cable. Neither approach is wrong. Aluminum and denser I/O cost more. HDMI-native video and a lower price cost less polish.
Who should buy which
Buy the Plugable TBT4-UD5 if you want dual 4K60 over HDMI today, ~100W charging, and a real Thunderbolt 4 dock without spending CalDigit money. That is the default pick for most Windows laptops and for Mac users who only need one external display (or already solved dual-display another way).
Buy the CalDigit TS4 if you need three downstream Thunderbolt 4 ports, 2.5GbE, DisplayPort-centric video, or the densest single-cable port set in this pair. It is the "forever desk" dock when budget is secondary.
Skip both if you only need one 1080p or 4K screen and Ethernet for under $80. Start with a USB-C hub or the working-from-home dock guide instead. And if your Mac cannot drive two native displays, read about DisplayLink before you buy either of these Thunderbolt boxes expecting a second independent panel.
Bottom line
Both docks are legitimate Thunderbolt 4 choices. The Plugable TBT4-UD5 wins overall on price-to-capability for dual HDMI 4K60 and laptop charging. The CalDigit TS4 wins the port, Ethernet, and high-resolution DisplayPort categories when those matter more than the roughly $180 gap. View on Amazon for whichever checklist matches your desk, then confirm your laptop's display and PD limits before you order.
