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5 Best Comcast Xfinity Recommended Modems 2026 in the United States

#1

Winner

10.0 score

Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

motorola

10.0 score

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The Motorola MB8600 DOCSIS 3.1 Cable Modem is an excellent choice for users subscribed to gigabit internet plans with Comcast Xfinity, Cox, and Charter Spectrum. Its support for DOCSIS 3.1 and 3.0 standards ensures top-speed internet performance, making it ideal for heavy internet users who need fast and reliable connections for streaming, gaming, or remote work. A standout feature is its compatibility with a variety of routers, including advanced systems like mesh Wi-Fi, which allows for flexible network setups tailored to different home sizes and needs.

Rating
10.0
Chosen by1,358
Speed

Most important from
10103 reviews

Speed
Replacing an old modem with the MB8600 was seamless and quick, without the need to contact Comcast, providing future-proof internet speed capabilities.
#2
9.1 score

Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required

Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required

ARRIS

9.1 score

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The ARRIS (S34) Cable Modem is a robust choice for those looking to eliminate rental fees from their cable provider. Its standout feature is the DOCSIS 3.1 technology, which is significantly faster and more secure compared to the older DOCSIS 3.0. This modem supports high-speed internet plans up to 2.5 Gbps, making it ideal for households with heavy internet usage, such as gamers or those who stream a lot of 4K content. It also includes a unique feature of switchable upstream filters, which can optimize upload speeds depending on your service provider's offerings.

Rating
9.1
Speed

Most important from
658 reviews

Speed
The ARRIS SBG8300 gateway is excellent, with no problems after one week and delivering performance above the purchased speeds.
#3
7.9 score

Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem | Pairs with Any WiFi Router | Approved for Comcast Xfinity, Cox Gigablast, Spectrum | 2.5 Gbps Port | 2500 Mbps Max Internet Speeds

Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem | Pairs with Any WiFi Router | Approved for Comcast Xfinity, Cox Gigablast, Spectrum | 2.5 Gbps Port | 2500 Mbps Max Internet Speeds

Motorola

7.9 score

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The Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem is designed for ultra-fast internet speeds, making it suitable for Comcast Xfinity, Cox Gigablast, and Spectrum users. It supports DOCSIS 3.1 standards, ensuring compatibility with the latest internet plans. With a maximum speed of 2,500 Mbps and a 2.5 GB Ethernet port, it can handle high-speed connectivity for demanding activities like gaming, streaming, and video conferencing.

Rating
7.9
DOCSIS Standard

Most important from
7408 reviews

DOCSIS Standard
Upgrading to this modem resulted in a roughly 10% improvement in speed, even on DOCSIS 3.0.

Top 5 Best Comcast Xfinity Recommended Modems 2026 in the United States

#1

Winner

10.0  score
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motorola

Motorola MB8600 DOCSIS 3.1 Cable Modem - Approved for Comcast Xfinity, Cox, and Charter Spectrum, Supports Cable Plans up to 1000 Mbps | 1 Gbps Ethernet Port

DOCSIS Standard: DOCSIS 3.1 and 3.0
Speed: gigabit internet
Compatibility: Comcast Xfinity, Cox, Charter Spectrum
Ethernet Ports: 1

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Chosen by 1358 this week

#2
9.1  score
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ARRIS

Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required

DOCSIS Standard: DOCSIS 3.1
Speed: up to 2.5 Gbps
Compatibility: Comcast Xfinity, Cox, Spectrum
Built-in Router: No
Ethernet Ports: 2 ports (2.5 Gbps, 1 Gbps)

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#3
7.9  score
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Motorola

Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem | Pairs with Any WiFi Router | Approved for Comcast Xfinity, Cox Gigablast, Spectrum | 2.5 Gbps Port | 2500 Mbps Max Internet Speeds

DOCSIS Standard: DOCSIS 3.1
Speed: 2,500 Mbps
Compatibility: Comcast, Cox, Spectrum
Built-in Router: No
Ethernet Ports: 2.5 GB port

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#4
7.0  score
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Motorola

Motorola MG7700 Modem WiFi Router Combo with Power Boost | Approved by Comcast Xfinity, Cox and Spectrum | for Cable Plans Up to 800 Mbps | DOCSIS 3.0 + Gigabit Router

DOCSIS Standard: DOCSIS 3.0
Speed: 1000 Mbps
Compatibility: Comcast Xfinity, Cox, Spectrum
Built-in Router: AC1900 dual-band Wi-Fi router
Ethernet Ports: 4 Gigabit Ethernet ports

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#5
7.0  score
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ARRIS

ARRIS SURFboard SBV2402 DOCSIS 3.0 Cable Modem , Comcast Xfinity Internet & Voice , 1 Gbps Port , 2 Telephony Ports , Supports Xfinity 800 Mbps Max Internet Speed

DOCSIS Standard: DOCSIS 3.0
Speed: Up to 800 Mbps
Compatibility: Xfinity Internet and Voice
Built-in Router: No
Ethernet Ports: 1 Gigabit Ethernet port

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Buying Guide for the Best Comcast Xfinity Recommended Modems

Choosing the right modem for your Comcast Xfinity service is crucial for ensuring you get the best internet experience. The modem is the device that connects your home network to the internet, and having the right one can make a big difference in speed, reliability, and overall performance. When selecting a modem, there are several key specifications to consider. Understanding these specs will help you make an informed decision that best suits your needs.
DOCSIS StandardDOCSIS (Data Over Cable Service Interface Specification) is the technology standard that modems use to provide internet service over cable lines. The most common standards are DOCSIS 3.0 and DOCSIS 3.1. DOCSIS 3.0 is suitable for most users and supports speeds up to 1 Gbps, which is sufficient for streaming, gaming, and general internet use. DOCSIS 3.1 is the latest standard and supports speeds up to 10 Gbps, making it ideal for future-proofing your network and for users with very high-speed internet plans. If you have a high-speed plan or want to ensure your modem will be compatible with future upgrades, opt for a DOCSIS 3.1 modem.
SpeedThe speed rating of a modem indicates the maximum internet speed it can handle. This is usually measured in megabits per second (Mbps) or gigabits per second (Gbps). To choose the right speed, consider your internet plan and usage. For basic browsing and streaming, a modem with speeds up to 300 Mbps is sufficient. For gaming, 4K streaming, or multiple users, look for a modem that supports speeds of 600 Mbps or higher. If you have a gigabit internet plan, you'll need a modem that supports speeds of 1 Gbps or more.
ChannelsModems use channels to send and receive data. The number of channels a modem has can affect its performance, especially during peak usage times. Channels are divided into downstream (download) and upstream (upload) channels. A modem with more channels can handle more data simultaneously, which can result in faster and more reliable internet. For basic use, a modem with 8x4 channels (8 downstream and 4 upstream) is adequate. For higher performance, look for modems with 16x4, 24x8, or even 32x8 channels. If you have a high-speed plan or multiple users, more channels can help maintain consistent speeds.
CompatibilityNot all modems are compatible with all internet service providers (ISPs). It's important to ensure that the modem you choose is approved for use with Comcast Xfinity. This information is usually available on the modem's packaging or the manufacturer's website. Using a compatible modem ensures that you can take full advantage of your internet plan and avoid any potential connectivity issues. Always check the compatibility list provided by Comcast Xfinity before making a purchase.
Built-in RouterSome modems come with a built-in router, which can be convenient if you want an all-in-one device. A modem-router combo can save space and reduce the number of devices you need to manage. However, separate modems and routers can offer better performance and flexibility, especially if you have specific networking needs or want to upgrade one component without replacing the other. If you prefer simplicity and ease of setup, a modem-router combo might be the right choice. If you want more control over your network or plan to use advanced features, consider getting a separate modem and router.
Ethernet PortsEthernet ports on a modem allow you to connect wired devices directly to the internet. The number of ports can vary, with some modems offering just one port and others offering multiple. If you have several devices that require a wired connection, such as gaming consoles, desktop computers, or smart TVs, look for a modem with multiple Ethernet ports. This can provide a more stable and faster connection compared to Wi-Fi. For most users, one or two ports are sufficient, but if you have a lot of wired devices, consider a modem with more ports.

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