10 Best Xfinity Modems 2025 in the United States

The Motorola MB7621 Cable Modem is a solid choice for those using cable Internet services. It is compatible with major ISPs like Comcast Xfinity, Cox, and Spectrum, which is a significant advantage for flexibility. The modem supports the DOCSIS 3.0 standard and is recommended for cable plans up to 900 Mbps, although its optimal performance is at 650 Mbps. This is suitable for most home internet needs, including streaming and online gaming.

The Full-Band Capture Digital Tuner is a notable feature that enhances both speed and reliability, ensuring stable internet access. However, the modem lacks a built-in router and telephone capability, which means you’ll need additional equipment if you need those functions. It’s designed to work well with Mesh networks and has a Gigabit Ethernet port for direct connections to devices.

Users will appreciate the easy setup process and the potential to save on rental fees. The device is compact, which helps with cooling and durability, and it comes with a 2-year warranty for added peace of mind. On the downside, it’s not compatible with fiber optic, DSL, or satellite services, and it doesn’t have a phone jack. For those specifically needing a simple, efficient modem for cable internet, the Motorola MB7621 is a commendable option.

The Motorola MT7711 is a versatile device that combines a cable modem, AC1900 router, and phone ports compatible with Comcast XFINITY services. As a DOCSIS 3.0 modem with 24x8 channel bonding, it supports internet speeds up to 400 Mbps, making it suitable for most household internet needs. The built-in router with dual-band WiFi and Power Boost technology enhances wireless speed and range, ensuring reliable connectivity for multiple devices.

Additionally, four Gigabit Ethernet ports allow for high-speed wired connections to multiple devices, which can be beneficial for gaming or streaming needs. The modem includes two phone ports for XFINITY Voice services, making it convenient for users who rely on landline services through their internet provider. The device's robust security features, including a Broadcom cable modem chipset, help protect against Denial of Service attacks, enhancing your network's safety.

It is important to note that this modem is only compatible with Comcast XFINITY and will not work with other internet service providers. Also, it lacks a backup battery option, which means phone services would not be available during a power outage unless an additional battery (Model 98250) is purchased. This product is a solid choice for Comcast XFINITY users looking to eliminate rental fees and integrate their modem, router, and phone services into a single device, but it's essential to consider the lack of cross-provider compatibility and the optional nature of the backup battery.

The Hitron CODA56 Multi-Gigabit DOCSIS 3.1 Modem is designed for users with high-speed internet plans, supporting speeds up to 2.5 Gbps. It's compatible with major ISPs like Xfinity, Spectrum, and Cox. The modem shines with its DOCSIS 3.1 standard, which is ten times faster than DOCSIS 3.0, ideal for users who need fast internet for gaming, streaming, and video conferencing. One major advantage is the ability to save on rental fees, potentially saving up to $168 annually.

The 2.5 gigabit Ethernet port ensures your router can handle these high speeds, but it’s crucial to note that this modem lacks built-in WiFi or router capabilities. This means you’ll need a separate router or WiFi mesh system to connect your devices wirelessly. While the modem offers significant speed improvements and excellent compatibility with major ISPs, it's not suitable for DSL, fiber, fixed wireless, or satellite services, and it doesn't work with providers like AT&T, Verizon, and Google Fiber.

With a customer rating of 4.2 out of 5 stars, most users find it reliable and high-performing, though some might find the lack of built-in WiFi limiting. This modem is ideal for tech enthusiasts and heavy internet users who have or plan to upgrade to high-speed internet plans and don’t mind using separate devices for WiFi connectivity.