CalDigit TS4 Thunderbolt 4 Dock Review: The Ultimate Dock?

Published July 19, 2026 · Reviewed by the Unbiased Advice & Insights editorial team · How we research and score

The CalDigit TS4 Thunderbolt 4 Dock is often called the gold standard for laptop docking stations. With 18 ports, 40Gbps speeds, and support for dual 6K displays, it promises to be the ultimate productivity hub. But at a premium price, does it deliver on its promises? Our editorial team compared specifications, buyer feedback, and key decision factors to provide an unbiased review.

Design and Build Quality

The TS4 features a full aluminum chassis that feels solid and premium. Its matte black finish resists fingerprints and blends well with most setups. The dock measures 8.7 x 3.5 x 1.1 inches and weighs 1.5 pounds, making it larger than many competitors but still desk-friendly. The front panel includes a Thunderbolt 4 host port, USB-C 10Gbps, SD/microSD slots, and a 3.5mm audio jack. The rear houses two Thunderbolt 4 downstream ports, three USB-A 10Gbps, two USB-C 10Gbps, 2.5Gb Ethernet, and a DC power input. The build quality is excellent, though the dock runs noticeably warm during heavy use, which is common for high-power docks.

Performance and Speed

The TS4 delivers full Thunderbolt 4 bandwidth of 40Gbps, which translates to fast file transfers, smooth external storage, and quick backups. In real-world use, copying large video files (10GB+) takes seconds. The 2.5Gb Ethernet port provides faster network speeds than standard 1Gb ports, beneficial for NAS or high-speed internet. The 98W power delivery charges most laptops quickly, including 16-inch MacBook Pros. Display support is impressive: dual 6K at 60Hz or single 8K at 60Hz. On M1/M2 Macs, you get one 6K display (or two 4K). Windows laptops with Thunderbolt 4 can achieve dual 6K. Overall, performance is top-notch, matching the advertised specs.

Ease of Use

Setting up the TS4 is straightforward: connect the included Thunderbolt 4 cable to your laptop and plug in the power adapter. The dock is plug-and-play on both Mac and Windows. All ports are clearly labeled and easy to access. The front-facing SD/microSD slots are convenient for photographers. The only minor inconvenience is the lack of an HDMI port, requiring an adapter or a monitor with USB-C/Thunderbolt input. The dock is compatible with Thunderbolt 4, Thunderbolt 3, USB4, and USB-C devices, ensuring broad compatibility.

Common Buyer Complaints

Despite its high rating, some users report issues. The most common complaint is the dock running hot, especially under heavy load. While this is normal for a 98W dock, it can be concerning. Another issue is occasional disconnections with certain Thunderbolt 3 cables; using the included cable or a certified one usually solves this. A few buyers note that the 2.5Gb Ethernet port may not work at full speed with some routers or switches. Finally, the price is a sticking point for many, as the TS4 costs significantly more than the TS3 Plus or other docks. However, most agree that the performance and build justify the cost for professionals.

Comparison: TS4 vs TS3 Plus

The TS3 Plus was CalDigit's previous flagship. The TS4 improves in several areas: power delivery (98W vs 87W), Ethernet speed (2.5Gb vs 1Gb), USB-A speed (10Gbps vs 5Gbps), and display support (dual 6K vs dual 4K). The TS4 also adds a second Thunderbolt 4 downstream port and a dedicated SD slot. The TS3 Plus is still a capable dock and costs less, but the TS4 offers better future-proofing for newer laptops and monitors. If you need the extra speed and display capabilities, the TS4 is worth the premium. Otherwise, the TS3 Plus remains a solid choice.

Final Verdict

The CalDigit TS4 Thunderbolt 4 Dock is an outstanding product that delivers on its promises. It offers unmatched speed, extensive port selection, and robust build quality. While it runs warm and carries a high price, it is a worthwhile investment for professionals who demand the best. If you need a reliable, high-performance dock for multiple displays and fast data transfers, the TS4 is hard to beat. For budget-conscious users or those with simpler needs, alternatives like the TS3 Plus or other USB-C docks may suffice.

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See our full buying guides hub and our research and scoring methodology. We compared specifications and verified owner feedback; we did not physically test every product.