We Use CookiesWe use cookies to enhance the security, performance, functionality and for analytical and promotional activities. By continuing to browse this site you are agreeing to our privacy policy

10 Best Xfinity Modems 2025 in the United States

How do we rank products for you?

Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.

headphones-stars

Our Top Picks

#1

Winner

Motorola MB7621 Cable Modem | Pairs with Any WiFi Router | Approved by Comcast Xfinity, Cox, and Spectrum | for Cable Plans Up to 900 Mbps | DOCSIS 3.0

Rating
9.9
Chosen by1,127
Compatibility
DOCSIS Standard
Speed

Most important from
29332 reviews

Compatibility
Setup is straightforward; just provide the MAC address to your ISP.
DOCSIS Standard
The modem is future-proof and ready for DOCSIS 3.1, even if the service isn't available yet in some areas.
Speed
Blazingly fast performance that hasn't failed since installation.
Built-in Router
Having separate modem and router units allows for flexible upgrades and avoids a single point of failure.

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.

Rating
9.9
Chosen by1,127
Compatibility
DOCSIS Standard
Speed

Most important from
29332 reviews

Compatibility
Setup is straightforward; just provide the MAC address to your ISP.
DOCSIS Standard
The modem is future-proof and ready for DOCSIS 3.1, even if the service isn't available yet in some areas.
Speed
Blazingly fast performance that hasn't failed since installation.
Built-in Router
Having separate modem and router units allows for flexible upgrades and avoids a single point of failure.
#2

Motorola MT7711 24X8 Cable Modem/Router with Two Phone Ports, DOCSIS 3.0 Modem, and AC1900 Dual Band WiFi Gigabit Router, for Comcast XFINITY Internet and Voice

Rating
9.8
Speed
Channel Bonding
Compatibility

Most important from
6011 reviews

Speed
WiFi performance is significantly faster, with download speeds on the 5 GHz channel about 20% faster than the Arris gateway.
Channel Bonding
The modem's dual-band capabilities allow for efficient network load distribution, keeping the computer on the 5 GHz channel and other devices on the 2.4 GHz channel.
Compatibility
The modem was certified to work on Comcast's network, and despite initial challenges, it was ultimately reliable and performed well once fully set up.
Ethernet Ports
Connecting the Motorola couldn't be easier, especially with an Ethernet cable. The setup was quick and the gateway registered with Xfinity almost immediately.
Security Features
The user interface is much better than the Arris gateway, with more flexibility on configurations and a better array of security options, including an onboard VPN.

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.

Rating
9.8
Speed
Channel Bonding
Compatibility

Most important from
6011 reviews

Speed
WiFi performance is significantly faster, with download speeds on the 5 GHz channel about 20% faster than the Arris gateway.
Channel Bonding
The modem's dual-band capabilities allow for efficient network load distribution, keeping the computer on the 5 GHz channel and other devices on the 2.4 GHz channel.
Compatibility
The modem was certified to work on Comcast's network, and despite initial challenges, it was ultimately reliable and performed well once fully set up.
Ethernet Ports
Connecting the Motorola couldn't be easier, especially with an Ethernet cable. The setup was quick and the gateway registered with Xfinity almost immediately.
Security Features
The user interface is much better than the Arris gateway, with more flexibility on configurations and a better array of security options, including an onboard VPN.
#3

Motorola MG7550 - Modem with Built in WiFi | Approved for Comcast Xfinity, Cox | For Plans Up to 300 Mbps | DOCSIS 3.0 + AC1900 WiFi Router | Power Boost Enabled

Rating
9.6
Speed
Built-in Router
Security Features

Most important from
7210 reviews

Speed
Replacing a rented Comcast/Xfinity modem-router with the Motorola MG7550 saves money and provides improved WiFi coverage and download speeds.
Built-in Router
Replacing a rented Comcast/Xfinity modem-router with the Motorola MG7550 saves money and provides improved WiFi coverage and download speeds.
Security Features
A much faster and stronger WiFi signal throughout the entire house, eliminating dead spots and improving connectivity for security cameras and other devices.

The Motorola MG7550 is a versatile modem and router combo approved for use with Comcast Xfinity, Cox, and other major cable providers. It supports DOCSIS 3.0 and is suitable for internet plans up to 300 Mbps, making it a reliable choice for most households. With 16 downstream and 4 upstream channels, it ensures stable and fast internet connectivity.

The built-in AC1900 dual-band WiFi router offers robust performance, even in areas with high WiFi noise, thanks to features like DFS and Power Boost. The four Gigabit Ethernet ports allow for multiple wired connections to devices such as computers, streaming devices, and gaming consoles. Security is enhanced with a Broadcom chipset that helps protect against Denial of Service attacks.

The device's vertical design saves space and improves cooling, and it comes with a two-year warranty and protection against power surges. However, it does not support fiber optic, DSL, or satellite services, and lacks a phone jack, which may be a drawback for some users. This product is best suited for those looking to eliminate rental fees and seeking a combined modem-router solution for a medium-sized household with multiple devices.

Rating
9.6
Speed
Built-in Router
Security Features

Most important from
7210 reviews

Speed
Replacing a rented Comcast/Xfinity modem-router with the Motorola MG7550 saves money and provides improved WiFi coverage and download speeds.
Built-in Router
Replacing a rented Comcast/Xfinity modem-router with the Motorola MG7550 saves money and provides improved WiFi coverage and download speeds.
Security Features
A much faster and stronger WiFi signal throughout the entire house, eliminating dead spots and improving connectivity for security cameras and other devices.

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.

FAQ

Most Popular Categories Right Now