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 MG7700 Modem WiFi Router Combo is a versatile device designed for households seeking to consolidate their modem and Wi-Fi router into a single unit. It is compatible with major ISPs like Comcast Xfinity, Cox, and Spectrum, making it a convenient choice for many users. The modem supports DOCSIS 3.0 and offers downstream speeds up to 1000 Mbps, although it is optimized for service plans up to 800 Mbps. This should be sufficient for most standard residential internet needs, including streaming and gaming.

The built-in router features AC1900 dual-band Wi-Fi, which can handle both 2.4GHz and 5GHz frequencies, enhancing your wireless coverage and performance. Additionally, four Gigabit Ethernet ports allow for fast wired connections to multiple devices. The Power Boost technology further amplifies the Wi-Fi signal, improving speed and range, an essential feature for larger homes or spaces with multiple users.

One of the primary benefits of the MG7700 is the potential cost savings, as it can eliminate the need for modem rental fees from your ISP, potentially saving you up to $156 per year. However, it's important to note that this modem is not compatible with fiber optic, DSL, or satellite services. Also, while it offers robust performance for DOCSIS 3.0, it may not be future-proofed for users anticipating higher speeds or DOCSIS 3.1 adoption. The Motorola MG7700 is a strong contender for users within its compatibility range, offering solid performance, extensive features, and significant cost savings.

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.