USB-C Standards: What Matters
USB-C is a connector type, not a performance specification. A cable or hub with a USB-C connector may support USB 3.2 Gen 1 (5Gbps), USB 3.2 Gen 2 (10Gbps), USB 3.2 Gen 2x2 (20Gbps), Thunderbolt 3 (40Gbps), or Thunderbolt 4 (40Gbps with additional certification requirements). Each standard has different capabilities for data, video, and power delivery.
USB 3.2 Gen 2 (10Gbps) — The minimum for a modern hub. Supports one 4K display at 30Hz or two 1080p displays. 100W power delivery pass-through is standard.
Thunderbolt 3/4 (40Gbps) — Required for dual 4K displays at 60Hz, single 5K display, or external GPU enclosures. TB3/TB4 hubs are more expensive but necessary for demanding display setups. The additional bandwidth matters: USB 3.2 Gen 2 maxes out at one 4K@60Hz display or two 4K@30Hz; TB3 can drive dual 4K@60Hz and still have bandwidth for high-speed data.
USB-C Alt Mode — Some hubs use Alt Mode DisplayPort to drive displays rather than the USB data path. Alt Mode provides fewer lanes and typically supports only one external display through the hub's HDMI output. Read the specifications carefully — "supports 4K display" may mean 4K@30Hz through a USB-A to HDMI adapter rather than native DisplayPort output.
Power Delivery: The Hidden Requirement
If your laptop charges via USB-C (most modern thin laptops do), the hub must support USB Power Delivery (PD) passthrough to charge while using the hub. The specification to look for: PD 3.0 with at least 100W input. Some hubs are rated at 60W or 85W, which charges smaller laptops fine but won't charge a 96W MacBook Pro at full speed.
Not all USB-C ports on a laptop support charging — some are data-only. The hub must be connected to the correct port on your laptop for passthrough charging to work. If you connect the hub and the laptop doesn't charge, check the laptop's manual for which port supports charging.
Beware of hubs that claim power delivery but don't meet the power requirements of connected devices. A hub with a 45W PD output that drives a laptop, external drive, and phone simultaneously will not charge the laptop while powering those devices.
Best Hubs for General Productivity
CalDigit TS4 — The standard recommendation for demanding users. 18 ports, 98W PD, dual 4K@60Hz support via Thunderbolt or DisplayPort. The TS4 drives two 4K displays from any laptop that supports Thunderbolt 3 or 4, including M-series MacBooks and Intel Windows laptops. The build quality is exceptional. The tradeoff: it is large and requires a separate power brick.
Anker 555 USB-C Hub (8-in-1) — A more compact option at a reasonable price point. USB-A ports, HDMI (4K@60Hz), SD card slots, 100W PD. Doesn't drive dual external displays — single HDMI output. Fine for most productivity use cases. The 10-in-2 USB-C hub format (passthrough with HDMI in a single connector) works better for laptops with only one usable USB-C port.
Plugable USB-C Triple Display Hub (USB-C-HDMI-4K) — For Windows laptops that need triple display. Supports three 1080p displays or two 4K@60Hz displays via USB-C Alt Mode. More complex setup than the CalDigit for Mac users because drivers are required for full display support.
Best Hubs for MacBooks (M-Series)
The M-series MacBooks have specific hub requirements: they do not support Alt Mode DisplayPort, so any video output must come through USB-C DisplayPort Alternate Mode or a DisplayLink chip. DisplayLink chips (DL-3xxx series) drive additional monitors from USB-C by compressing the display signal — this is the only way to get three or four external displays from an M-series Mac without eGPU.
CalDigit TS4 — Works with M-series MacBooks and drives dual 4K@60Hz directly, triple 4K with DisplayLink on top. Best-in-class for MacBook Pro and MacBook Air users who need maximum port count and display support.
Belkin USB-C Travel Hub — Compact for travel, 4K@60Hz HDMI, USB-A, USB-C PD passthrough. No dual display support — but this is the trade-off for the compact form factor. Good for hotel and mobile use.
DisplayLink Hubs: When You Need More Displays
If you need more than two external displays from a laptop, you need a hub with a DisplayLink chip. DisplayLink uses USB compression to drive displays over USB 3.0 — it is software-dependent (requires driver installation) but allows multiple simultaneous external displays from any laptop with a USB-A or USB-C port.
Plugable USB-C Dual 4K DisplayLink Dock (UD-ULC4K) — Drives two 4K@60Hz displays simultaneously using DisplayLink from any laptop with USB-C or USB-A. Requires DisplayLink driver installation. Includes 100W PD, USB-A, USB-C, ethernet. The best option for users who need four display outputs total (laptop + two or three externals).
DisplayLink performance: the compression algorithm has improved significantly and is imperceptible for productivity use. Video editing and other GPU-intensive tasks may show slight compression artifacts on some displays — test your specific workflow before relying on it for professional video work.
The Bottom Line
The right hub is determined by your specific laptop, your display configuration, and whether you need power passthrough. Read the specifications carefully — claims like "4K display support" can mean a single 4K@30Hz through a cramped USB-A port adapter, not the dual 4K@60Hz output you need.
For most users: CalDigit TS4 if you need maximum port count and display support, Anker 555 if you need moderate connectivity at a reasonable price, or a DisplayLink dock if you need more than two external displays from an M-series MacBook.