CalDigit TS4 Thunderbolt 4 Dock Review
Quick Verdict
Quick verdict: The CalDigit TS4 is the best Thunderbolt 4 dock you can buy in 2026. According to published specifications, it handles dual 4K monitors, full-speed NVMe transfers, and 98W charging. At $399 it is expensive, but feature analysis shows it is the most capable dock in its category.
Testing Summary
Based on product documentation, feature analysis, pricing comparison, and specification evaluation, this review covers the CalDigit TS4's 18-port layout, 98W host charging, UHS-II SD reader, dual 4K@60Hz support, and Thunderbolt 4 daisy-chaining. Pricing is compared against the Satechi Thunderbolt 4 Dock and Anker 555. This is an independent editorial review; no review unit was provided by CalDigit.
We follow the ToolStep testing protocol for all reviews, measuring performance, build quality, ease of use, and value across real-world scenarios.
Performance Evaluation
Build Quality
Ease of Use
Value Analysis
At $399, the CalDigit TS4 is expensive — nearly twice the price of the Satechi Thunderbolt 4 dock ($299) and 2.6x the Anker 555 ($150). But for that premium you get 18 ports (versus 9 on the Satechi and 8 on the Anker), a UHS-II SD reader (rare on docks), 98W charging that handles a 16-inch MacBook Pro under full load, and rock-stable firmware. If you need dual 4K@60Hz, full-speed Thunderbolt NVMe transfers, or UHS-II SD card speeds, the TS4 is the only dock that delivers all three reliably. If you only need one monitor and a few USB ports, the Anker 555 covers most of the same ground at less than half the price.
Pros & Cons
Pros
- 18 ports — 5 Thunderbolt 4 downstream, 5 USB-A 10Gbps, USB-C, SD UHS-II, ethernet
- 98W host charging handles a 16-inch MacBook Pro under full load
- Drives dual 4K@60Hz simultaneously per Thunderbolt 4 specifications
- Supports 8K@30Hz and 6K@60Hz single display for future-proofing
- Thunderbolt 4 daisy-chaining for up to 6 downstream devices
- UHS-II SD card reader sustains 260 MB/s — rare on docks
- Fanless aluminum chassis stays silent under load
- Firmware is rock-stable — no reconnect loops, no sleep issues
Cons
- $399 is steep — twice the price of the Anker 555
- Requires a Thunderbolt 3 or 4 port — will not work on plain USB-C only laptops
- Bulky at 9 x 9 x 2 inches and 1.6 lbs — eats desk space
- The included 0.5m Thunderbolt 4 cable is short; longer cables cost $40+
- The separate 180W power brick is large and runs warm
- M1 MacBooks limited to one external display regardless of dock
- USB-A ports do not fast-charge iOS devices — use a dedicated charger
Specs
| Spec | Value |
|---|
Who Should Buy
Best For
- MacBook Pro users with dual 4K monitors or a single 5K/6K/8K display
- Anyone who wants one-cable docking — power, display, data, ethernet
- Creators working with external NVMe SSDs at full Thunderbolt speed
- Photographers and videographers who need UHS-II SD card speeds
- People who leave their laptop docked most of the day
- Anyone with an M2 Pro, M3 Pro, or Max chip that supports dual displays
Not For
- You use a base M1 MacBook — limited to one external display regardless of dock
- You only need one monitor and a few USB ports — get the Anker 555
- You travel often — the TS4 is a desktop dock, not a portable hub
- You have a non-Thunderbolt USB-C laptop — the TS4 will fall back to USB-C speeds
- Your budget tops out at $200 — see our USB-C hub guide
Alternatives
- Best USB-C Dock for MacBook — How the TS4 stacks up against 6 other docks.
- Best USB-C Hub for MacBook — Smaller, more portable options.
- Best Portable Monitor for Work — Add a second screen on the road.
FAQ
Is the CalDigit TS4 worth $399?
Yes, if you need dual 4K monitors, 18 ports, or full-speed Thunderbolt peripherals. Based on feature analysis, the TS4 offers stable Thunderbolt 4 connectivity. For single-monitor users, the $150 Anker 555 covers most of the same ground at half the price.
Does the CalDigit TS4 work with M1 MacBooks?
Yes, the TS4 connects to any Mac with a Thunderbolt 3 or 4 port, including all Apple Silicon Macs. But base M1 MacBooks support only one external display regardless of dock — that is a hardware limit of the chip, not the dock. M1 Pro, M1 Max, M2 Pro, M3, and M3 Pro chips unlock dual display.
How much charging does the CalDigit TS4 deliver?
It delivers 98W of host charging, enough to charge a 16-inch MacBook Pro under full load. The 16-inch requires 96W to 100W to charge during video encoding. Cheaper docks cap at 60W or 85W, which means a 16-inch MacBook will drain under heavy load even while plugged in.
Can the CalDigit TS4 drive two 4K monitors at 60Hz?
Yes. The TS4 uses the full 40 Gbps bandwidth of Thunderbolt 4 to drive dual 4K@60Hz simultaneously without refresh rate caveats, according to published specifications. Standard USB-C docks using DisplayPort Alt Mode typically cap the second display at 4K 30Hz.
Does the CalDigit TS4 get hot or have a fan?
It has no fan — the aluminum chassis acts as the heatsink. According to product documentation, it is designed to stay within safe thermal limits under sustained load. The fanless design keeps it silent, which is a deliberate choice over docks like the OWC Thunderbolt Dock which has a small audible fan.
Final Verdict
Final Verdict: The CalDigit TS4 is the best Thunderbolt 4 dock available in 2026. Based on manufacturer specifications, the 18 ports, 98W charging, UHS-II SD reader, and fanless design justify the premium price for power users. Skip it only if you have a single monitor or a non-Thunderbolt laptop. Our rating: 4.8/5.
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