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10 Best Xfinity Modems 2025 in the United States

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Our Top Picks

#1

Winner

ARRIS (SB8200) - Cable Modem - Fast DOCSIS 3.1 32x8 Gigabit Cable Modem , Approved for Comcast Xfinity, Cox, Charter Spectrum, & more | 1 Gbps Max Internet Speed, 4 OFDM Channels

The ARRIS SURFboard SB8200 is a robust cable modem designed for high-speed internet access, especially for users of Comcast Xfinity and other major U.S. providers. It utilizes the advanced DOCSIS 3.1 technology, which significantly increases internet speed potential, offering up to 1 Gbps, making it suitable for heavy streaming and gaming. This modem includes two 1-Gigabit Ethernet ports, providing flexibility for wired connections to other devices or a Wi-Fi router.

One of the key advantages of the SB8200 is its ability to save you money in the long run by eliminating the need for rental fees from your ISP, potentially saving up to $168 annually. It’s compatible with various cable internet providers, which adds to its versatility. The device is also designed for easy setup; users simply need to plug it in and follow the instructions via the SURFboard Central App.

There are a few drawbacks to consider. While the built-in features are excellent for standard use, the SB8200 doesn't have a built-in Wi-Fi router. This means you'll need to purchase a separate router for wireless connectivity, which could be an additional expense. Additionally, while the modem is compatible with most major ISPs, it’s important to confirm compatibility with your specific plan to avoid any service interruptions. Some users may find the initial setup challenging if they're not very tech-savvy.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Speed
The ARRIS SURFboard SB8200 modem is incredibly fast and pairs well with high-performance routers like the Asus RT-AX88U Pro.
Compatibility
Despite some initial setup challenges with Xfinity, the modem's performance is rock solid once configured properly.
Ethernet Ports
The modem's compact size and two Ethernet ports add to its convenience and flexibility.
#2

ARRIS (S33) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit WiFi For Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 2 Year Warranty

The ARRIS (S33) modem is a solid choice for those looking to ditch rental fees and own their own modem. Featuring the latest DOCSIS 3.1 technology, it offers impressive speed capabilities, with support for up to 2.5 Gbps. This makes it a great fit for users who require high-speed internet for activities like gaming and streaming, as well as future-proofing for those who want to keep up with the latest ISP offerings. The S33 is compatible with major U.S. cable providers such as Comcast Xfinity, Cox, and Spectrum, making it versatile for a wide audience.

The presence of 4 OFDM channels enhances its performance by reducing lag and improving network efficiency. Another highlight is the straightforward setup process via the SURFboard Central App, making it user-friendly even for those who aren’t tech-savvy. However, it's worth noting that the modem lacks a built-in router, which means you will need a separate device for Wi-Fi connectivity. Also, while it boasts high-speed Ethernet ports (1 & 2.5 Gbps), it has a limited number of ports, which might be a downside for users needing multiple wired connections.

Security-wise, DOCSIS 3.1 offers better protection compared to older standards, which is a significant plus. In essence, the ARRIS (S33) is a powerful and efficient modem, ideal for users seeking high-speed internet and willing to invest in a separate router for full networking needs.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Speed
Lightning fast internet speeds reaching every corner of a 3,400 sq ft house.
Compatibility
You CAN use this modem with Xfinity service, but you might need to work with their support for activation.
#3

NETGEAR Nighthawk Modem Router Combo C7000-Compatible with Cable Providers Including Xfinity by Comcast, Spectrum, Cox,Plans Up to 800Mbps | AC1900 WiFi Speed | DOCSIS 3.0

The NETGEAR Nighthawk Modem Router Combo C7000 is a capable device for Xfinity, Spectrum, and Cox users with internet plans up to 800Mbps. Featuring DOCSIS 3.0, it supports high-speed internet up to 1900Mbps with dual-band WiFi, ensuring robust and reliable performance. With coverage of up to 1,800 sq. ft. and the ability to connect up to 30 devices, it is well-suited for medium to large homes with multiple users and devices.

The built-in router with AC1900 speed eliminates the need for separate devices, potentially saving up to $168 annually on rental fees. Equipped with 4 Gigabit Ethernet ports and 1 USB 2.0 port, it offers ample connectivity options for wired devices like gaming consoles and computers. The security features are quite comprehensive, including WPA/WPA2 protocols and NETGEAR Armor software, which provides real-time protection against cyber threats, though only a 30-day trial is included.

The Nighthawk app makes setup and management convenient, even for users who aren't tech-savvy. However, the modem router is not compatible with DSL providers, Verizon, AT&T, or bundled voice services, limiting its versatility. Additionally, some users might find the lack of future-proofing concerning, as DOCSIS 3.1 is not supported. Despite these limitations, the C7000 remains a strong choice for users looking to streamline their home network setup with reliable performance and robust security features.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Speed
An excellent upgrade from older models with easy setup using the Nighthawk app and flawless performance on a 1Gbps plan.
Compatibility
Setup was straightforward, guided step-by-step via the Nighthawk app, and activation through the Xfinity app was seamless.
Built-in Router
The modem's WiFi 6 capability ensures a stable and fast connection without any drops.
Security Features
Offers great value for money, especially when found on sale, with features like a 90-day vulnerability scan enhancing its appeal.

Buying Guide for the Best Xfinity Modems

Choosing the right modem for your Xfinity internet service is crucial for ensuring a reliable and fast internet connection. The modem is the device that connects your home network to the internet, so it's important to pick one that meets your needs and is compatible with your service plan. Here are some key specifications to consider when selecting an Xfinity modem, along with explanations to help you make an informed decision.
CompatibilityCompatibility refers to whether the modem works with your specific Xfinity internet plan. This is important because not all modems are compatible with all service plans. To navigate this, check the modem's specifications or the Xfinity website to ensure it supports your internet speed tier. If you have a high-speed plan, make sure the modem can handle those speeds. For lower-speed plans, a basic modem will suffice. Your need for compatibility is guided by your current or planned Xfinity service plan.
DOCSIS StandardDOCSIS (Data Over Cable Service Interface Specification) is the technology standard that modems use to deliver internet service. 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, while DOCSIS 3.1 is more future-proof and supports speeds up to 10 Gbps. If you have a high-speed plan or want to ensure your modem remains relevant for future upgrades, opt for DOCSIS 3.1. For standard internet usage, DOCSIS 3.0 is typically sufficient.
SpeedThe speed rating of a modem indicates the maximum internet speed it can handle. This is important because it determines how well the modem can support your internet activities. Modems are often rated in Mbps (megabits per second) or Gbps (gigabits per second). For basic browsing and streaming, a modem with speeds up to 300 Mbps is adequate. For gaming, 4K streaming, or multiple users, consider a modem with speeds of 1 Gbps or higher. Your internet usage patterns will guide you in choosing the right speed.
ChannelsChannels refer to the number of data streams the modem can handle simultaneously. This is important for managing internet traffic and ensuring a stable connection. Modems typically have a certain number of downstream (download) and upstream (upload) channels. For light internet use, a modem with 8x4 channels (8 downstream and 4 upstream) is sufficient. For heavy use, such as gaming or streaming, look for modems with 16x4 or 32x8 channels. Your internet usage and the number of devices connected will help determine the right number of channels.
Built-in RouterSome modems come with a built-in router, which combines the functions of both devices into one unit. This is important for convenience and reducing the number of devices you need. If you prefer a simple setup and have a small to medium-sized home, a modem-router combo can be a good choice. However, if you have a large home or require advanced networking features, a separate modem and router might be better. Your preference for simplicity versus advanced features will guide this decision.
ISP ApprovalISP approval means that the modem has been tested and certified by Xfinity to work with their service. This is important to ensure compatibility and optimal performance. To navigate this, check the list of approved modems on the Xfinity website. Choosing an approved modem ensures that you won't encounter issues with your internet service. Your need for a hassle-free experience will guide you to select an ISP-approved modem.

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