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 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.

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.