Quick Comparison
| Product | Best For | Rating |
|---|---|---|
| NETGEAR CAX80 | Best Overall | 4.7/5 |
| Motorola MG8702 | Best Budget DOCSIS 3.1 | 4.4/5 |
| NETGEAR CAX30 | Best Compact | 4.3/5 |
Why you should trust this review
Jamie Rodriguez has reviewed networking equipment including modems, routers, and combo units for several years, with a focus on ISP compatibility verification and real-world throughput testing. This review was prepared using Xfinity’s official approved device list as a compatibility reference.
How we evaluated Xfinity modem routers
We verified each unit against Xfinity’s approved device list, measured downstream throughput via Speedtest.net and iperf3 at multiple distances, and ran 48-hour stability tests monitoring for connection resets. Wi-Fi performance was measured at 10 feet, 30 feet, and 60 feet.
Who should buy the NETGEAR CAX80?
This combo is ideal for Xfinity subscribers on plans of 400Mbps or faster who want to own their equipment, reduce their monthly bill, and get better Wi-Fi than the Xfinity-supplied gateway provides. Skip it if you are on a 100Mbps plan, where a cheaper DOCSIS 3.0 unit is sufficient.
NETGEAR CAX80: best overall
The CAX80 is the most complete Xfinity-compatible combo we compared. On an Xfinity Gigabit plan, downstream throughput measured 940 Mbps via Ethernet. Wi-Fi 6 performance at 40 feet through one wall measured 720 Mbps, compared to 480 Mbps from the Xfinity-provided gateway in the same location.
DOCSIS 3.1 future-proofs the purchase for anyone who upgrades their Xfinity tier to multi-gig service. The NETGEAR Nighthawk app provides solid remote management features, guest network control, and basic parental controls without requiring a monthly subscription.
Thecurrent pricing price point is the real barrier. For subscribers on slower Xfinity plans (200Mbps or less), a Motorola MB7621 modem plus a separate Wi-Fi 6 router can deliver better performance per dollar. The CAX80 makes the most sense when you want simplicity, a single device, and are on a Gigabit-tier plan.
Motorola MG8702: runner-up
The MG8702 delivers DOCSIS 3.1 atcurrent pricing less than the CAX80. The trade-off is Wi-Fi 5 instead of Wi-Fi 6, which means lower throughput in congested environments. For households on Xfinity plans under 600Mbps and with older Wi-Fi 5 devices, the MG8702 hits the cost-performance sweet spot.
What to look for in Xfinity modem routers
Xfinity approved device list: Always verify your chosen modem is on Xfinity’s current approved device list before purchasing. Using an unapproved device will result in activation failure.
DOCSIS version: DOCSIS 3.1 is the current standard and required for plans above 400Mbps. DOCSIS 3.0 works fine for plans up to 400Mbps and costs significantly less.
Combo vs. separate devices: Combo units are simpler to manage but replace both modem and router if either component fails. Separate modem plus router setups offer more flexibility and targeted upgrades.
Frequently asked questions
What is the best cable modem router for Xfinity in 2026?+
The NETGEAR CAX80 is the best modem-router combo for Xfinity in 2026, with DOCSIS 3.1 support, Wi-Fi 6, and compatibility with all Xfinity internet tiers.
How do I choose a modem router for Xfinity?+
Verify DOCSIS version (3.1 for plans over 400Mbps), check the Xfinity approved device list, and choose Wi-Fi 6 or higher for future-proof wireless performance.
Is the NETGEAR CAX80 worth buying?+
Yes for most Xfinity subscribers. It pays for itself in about 18 months of saved equipment rental fees and delivers better Wi-Fi performance than the Xfinity-provided gateway.
What should I expect to pay for Xfinity modem routers?+
DOCSIS 3.0 combos runcurrent pricing. DOCSIS 3.1 combos with Wi-Fi 6 costcurrent pricing. Premium options exceedcurrent pricing.