10 Best Xfinity Modems 2025 in the United States

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.

The NETGEAR Nighthawk Cable Modem CM1200 is a robust option for anyone needing high-speed internet up to 2Gbps, making it compatible with most cable internet providers like Xfinity, Spectrum, and Cox. This modem uses the latest DOCSIS 3.1 technology, ensuring faster speeds and better efficiency compared to older standards. The 32x8 channel bonding and OFDM 2x2 further enhance its speed and reliability, which is a significant advantage for heavy internet users, gamers, and streamers.

It is not compatible with DSL providers or fiber services like Verizon and AT&T, so it's important to verify compatibility with your internet provider before purchasing. Another notable feature is the four Gigabit Ethernet ports, allowing for multiple wired connections, which can be beneficial for a home office or gaming setup. The ability to combine two 1G ports into a single 2G port for faster wired connections is also a plus.

The CM1200 doesn't come with a built-in router, meaning you'll need a separate WiFi router for wireless connections, which could be an added expense. Additionally, while the modem offers some basic security features, it might not be as advanced as those found in dedicated modem-router combos. The NETGEAR Nighthawk CM1200 is a solid choice for users looking to replace rental equipment, save on fees, and enjoy high-speed internet, provided they don't mind the need for an additional router for WiFi connectivity.

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.