If you’re among the more than 32 million Comcast Xfinity customers in the US, and you are looking to enhance your internet connection by purchasing an external Xfinity compatible modems is a must.
The best modem for Xfinity comes with DOCSIS 3.1 technology, 32×8 channels bonding, and gigabit internet speed.
Getting a 3rd-party Xfinity-compatible modem permits users to take advantage of the most advanced technology in performance and security technologies, and removes the monthly rental costs.
By using the Xfinity Gateway as an example, you can save as much as $180 annually in rental fees to cancel Xfinity Internet service and invest in an external modem.
We have tested 30 different modes that were approved by Xfinity and have narrowed the selection down to the 7 best modem for Xfinity that have been discussed below.
Quick Comparison: Best Modem for Xfinity
| Modem / Combo | DOCSIS | Max Speed | Wi‑Fi | Best For | Ports |
|---|---|---|---|---|---|
| Motorola MB8611 | 3.1 | ~2500 Mbps | ❌ | Best overall modem | 1×2.5Gb |
| ARRIS Surfboard G36 | 3.1 | ~3000 Mbps | ✅ Wi‑Fi 6 | Best modem/router combo | 5 (incl. 1×2.5Gb) |
| ARRIS Surfboard S33 | 3.1 | ~2500 Mbps | ❌ | Budget DOCSIS 3.1 | 1×2.5Gb + 1×1Gb |
| Netgear Nighthawk CM2050V | 3.1 | ~2500 Mbps | ❌ | Xfinity Voice + Internet | 1×2.5Gb + 2×Phone |
| Netgear Orbi CBK752 | 3.1 | ~4200 Mbps | ✅ Wi‑Fi 6 Mesh | Large home coverage | 6 Ethernet |
| Netgear Nighthawk CM1200 | 3.1 | ~2000 Mbps | ❌ | Gaming / wired focus | 4×1Gb (link agg.) |
| ASUS CM‑AX6000 | 3.1 | ~6000 Mbps | ✅ Wi‑Fi 6 | Wi‑Fi 6 modem/router | 4×1Gb |
Best Modem For Xfinity: 7 Picks for Gaming and Streaming
The purchase of a modem can save cash on monthly rental costs, but the modem you buy must be compatible with Xfinity Internet services.
Below, we list the 7 best modem for Xfinity. This list was compiled after rigorous testing of 30 different modems, and the best performers in both design and functionality are on our list.
1. Motorola MB8611
It is the Motorola MB8611 is the best modem for Xfinity and future-proof modems that support up to 2500Mbps. It weighs 1.1 grams and measures 0*7.25*7.88 inches.
It is a typical style as it’s an oval box with five LEDs on the front of the box to show its connectivity and status.
Three inputs are available on the back of the device. There is a 2.5 Gbps Ethernet port for connecting a router or device, a coax port to plug in coaxial cables, and a power port.
You can connect to any gaming console or smart TV and other devices that are connected via an Ethernet cable.
In our tests, we observed improved app performance and reduced gaming latency, conferencing, and streaming online, thanks to the Active Queue Management (AQM) feature.
Why to Buy
- Ultra-fast DOCSIS 3.1 speeds up to 2.5 Gbps
- 2.5 Gb Ethernet port for full-speed connections
- Future-proof and reliable
Why to Avoid
- No built-in Wi-Fi
- Slightly higher price than basic models
Also read: Best Travel Routers in 2025: Top Picks for Every Traveler
2. ARRIS SurfBoard G36
It is the ARRIS SurfBoard G36 combines the capabilities of DOCSIS 3.1 and WiFi 6 technologies to lower the latency associated with high-bandwidth apps such as games, conference calls, and 4K streaming, to increase the efficiency and performance of your entire network.
The G36 lets you enjoy the fastest streaming and download speeds throughout your home while increasing the capacity of your internet.
It can provide speeds up to 3000 Mbps. It can extend approximately 2500 square feet.
The app offers enhanced parental controls, such as setting a time limit, preventing access to the web, and much more. It allows you to track the devices connected in real-time, build and manage guest networks, and also access the basic WiFi settings.
The G36 comes with five Ethernet ports (four 1-gig and one 2.5-gig) to ensure the smart TV can be connected to your computer, gaming consoles, streaming players, and enjoy better and faster wired connectivity.
Why to Buy
- DOCSIS 3.1 + Wi-Fi 6 all-in-one
- Fast speeds up to 3 Gbps
- App controls and parental settings
Why to Avoid
- Less upgrade flexibility
- More expensive than buying a separate modem + router
3. ARRIS Surfboard S33
ARRIS Surfboard S33 ARRIS Surfboard S33 is a vertical device with LED lighting on the front and Power, Ethernet, and coaxial cable ports at the back.
The rounded structure gives an impression of unity and stability for the entire device.
This best modem for Xfinity is equipped with a 1-Gig Ethernet port and a 2.5-Gig Ethernet port, which lets you connect it to WiFi routers or any other wired device, and get Gigabit speeds for your devices.
The gaming and streaming efficiency of S33 does not suffer from lags or lag.
The multi-core processor comes with 1GB of RAM to minimize any type of congestion, while the OFDMA 2*2 channel allows you to get faster data transmission.
The ARM-based chipset allows you to prioritize certain transmission needs in a hurry by using a spectrum analyzer integrated into the chip.
Why to Buy
- Affordable DOCSIS 3.1 modem
- Multi-gig support for future upgrades
- Reliable performance
Why to Avoid
- Single 2.5 Gb Ethernet port
- No Wi-Fi built-in
4. Netgear Nighthawk CM2050V
The Nighthawk CM2050V is constructed of toughened plastic, which gives it long-lasting durability. It features the same layout vertically as its predecessor, however, with a new upgrade.
We evaluated the performance of the modem using an Xfinity Voice service, and the CM2050V is the best modem for Xfinity. The device is better suited for workplace and business configurations since it has two phone jacks and a 2.5 gig port for LAN.
In terms of ports, the CM2050V has one Ethernet port, which allows users to connect at multiple gigabit speeds, and two phone lines to connect any landline telephone to your modem. In addition, it allows for three-way conference calls, which means that you can add a third party to a two-person conversation.
In addition, you can direct incoming calls to different numbers, as it is compatible with call forwarding.
Features like QoS IPV6, QoS functionality, and 2*2 OFDMA support will ensure that your devices will have a faster speed and more efficient internet, and the built-in bandwidth tuner increases the WiFi speed of the device.
Why to Buy
- Phone ports for Xfinity Voice service
- DOCSIS 3.1, 32×8 channels
- Great for bundles (internet + phone)
Why to Avoid
- Expensive if you don’t use voice
- Only compatible with Xfinity
5. Netgear Orbi CBK752
The Orbi CBK752 mesh router allows gamers or streamers to play without lagging or inconsistencies due to its effectiveness in reducing congestion, traffic prioritization, and throughput.
In addition, this best modem for Xfinity internet. It has the latest features, three bands, and technology such as DOCSIS 3.1 and WiFi 6, to ensure it has faster internet speeds that can reach 4200 Mbps.
Additionally, WiFi 6 capability is the most advanced technology that allows users to experience higher speeds than the previous model, offers more capabilities, and allows you to connect up to 40 devices.
You can use the app called Orbi to quickly install the CBK752 following the simple steps shown by the app.
The app allows you to control the different settings for your network, check the internet speeds, and keep track of the way you and your family use the data.
Why to Buy
- Wide coverage up to 5000 sq ft
- Wi-Fi 6 with tri-band support
- Smart parental controls and app management
Why to Avoid
- High cost
- Overkill for small homes
6. Netgear Nighthawk CM1200
The Netgear CM1200 is equipped with DOCSIS 3.1 Modem Technology and 32×8 channel bonding to provide users with the fastest internet connection.
The CM1200 has four Ethernet ports, so you can make a more efficient wired connection to your game console, printer, different WiFi routers, computers, and many other devices.
The Netgear CM1200 comes with multi-gig technology, which allows link aggregation with two 1-Gig ports to form one 2G port, ensuring the speed of your connected wired Ethernet connections is speedy. This feature makes it the best cable modem for Xfinity Internet Service.
The CM1200 is designed to provide high speed because it supports cable internet plans between 2 and 3 Gbps to ensure that you get stable and speedy internet to support HD downloads and streaming.
Why to Buy
- DOCSIS 3.1 with link aggregation
- Four Ethernet ports for multiple wired devices
- Excellent for gaming and streaming
Why to Avoid
- No built-in Wi-Fi
- Occasional reboots reported
7. ASUS CM-AX6000
The router in the ASUS AX6000 comes with the latest generation of 802.11ax WiFi speed, which can support 1024-QAM and 160MHz bandwidth to offer significantly more efficient wifi connectivity for your device. Its 802.11ax can be 2.3 times more efficient than 802.11ac.
However, this best modem for Xfinity comes with DOCSIS 3.1 support that will provide massive improvements in download and upload speeds, allowing you to use your internet at the speed you are currently using and at the highest speeds.
If you purchase the ASUS AX6000 router, you can get a discount on the monthly rental costs and also get more from the combination router and modem.
The AX6000 is equipped with four Ethernet ports that provide greater options to connect your devices, like game consoles, smart TV, NAS devices, and others, allowing them to have their own ports. It makes ASUS AX6000 a digital home hub.
Why to Buy
- DOCSIS 3.1 + Wi-Fi 6 speeds up to 6 Gbps
- Four Ethernet ports for multiple devices
- Quiet, fan-less design
Why to Avoid
- Can be tricky to activate
- Pricey if you don’t need Wi-Fi 6
Also read: Best USB WiFi Adapter for 2025: Upgrade Your Internet Speed
How We Test the Best Modem for Xfinity
Testing the best Comcast modem isn’t just about speed: we look at real-world performance, reliability, and ease of use. Here’s what we focus on:
- Xfinity Compatibility: Make sure it’s officially approved and matches your internet plan.
- Setup & Activation: Easy installation and smooth activation, plus app usability for combos.
- Speed Test: Check download, upload, and latency on wired and wireless devices.
- Wi‑Fi Coverage: Test speed and signal in different rooms to spot dead zones.
- Multi-Device & Gaming: Ensure stable performance with multiple devices and low-latency gaming.
- Reliability & Features: Check for heat, firmware updates, parental controls, and QoS.
- Value for Money: Compare cost with speed, features, and future-proofing.
Tip: Real testing is done on your actual Xfinity plan — this shows how the modem performs in your home.
Wrap Up
Selecting the best modem for Xfinity internet could be difficult because you have to find a solution that’s superior to rentals, while also saving money and improving internet speed.
This is because of features such as the ultra-fast DOCSIS 3.1 technology that allows you to enjoy Gigabit-plus speeds on devices.
Furthermore, it is worth noting that the 2.5 1 GB Ethernet port offers high-speed internet connectivity even to the most powerful routers and computers. Based on our experience, it can provide speeds upstream of as high as 800 Mbps, and downstream speeds of 2500 Mbps.
For more details on the factors to consider when buying the best modem for Xfinity that is compatible with Comcast Xfinity Internet services, check out the buying guide detailed within this post, Xfinity modem reviews 2026.
FAQs: Best Modem For Xfinity Internet
What is the best modem for Xfinity internet in 2026?
The best modem for Xfinity in 2026 depends on your needs. Top choices include Motorola MB8611, ARRIS Surfboard G36, and Netgear Nighthawk CM2050V, offering DOCSIS 3.1, gigabit speeds, and reliable performance.
Can I use any modem with Xfinity?
No, only Xfinity-approved modems are compatible. Using non-approved devices may cause unstable connections, slow speeds, or service issues. Always check Xfinity’s compatibility list before buying.
How do I activate my Xfinity-compatible modem?
Plug in the modem to coax and power. Connect to a PC or router via Ethernet. Visit Xfinity’s self-activation page or call customer service. Follow on-screen instructions to finish setup.
How do I know if my modem is Xfinity compatible?
Check Xfinity’s official approved modem list. Compatible modems are tested for performance, DOCSIS support, and stability on Xfinity internet plans. Using non-approved devices may lead to service interruptions.
Which is better: buying a modem or renting from Xfinity?
Buying your own modem saves money on rental fees and gives access to faster speeds, better features, and future-proofing. Renting is convenient but costs about $180/year.
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