6 Best Xfinity Cable Modems 2026 in the United States
#1
Winner
Arris (G20) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1.0 Gbps Max Speeds, Next-Generation Upload Optimized
The ARRIS SURFboard G20 is a robust cable modem router combo that offers a variety of compelling features for home and business users. Utilizing the latest DOCSIS 3.1 technology, it ensures high-speed internet with a maximum capability of 1.0 Gbps and supports multi-gig networking. This makes it an excellent option for those looking to future-proof their internet setup. It also features WiFi 6 (AX3000), which promises better performance and faster speeds for compatible devices, with notable benefits for gaming and streaming activities.
Rating
10.0
Chosen by1,175
Speed Tier Compatibility
ISP Compatibility
Ethernet Ports
Most important from
168 reviews
#2
Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required
The ARRIS (S34) cable modem is a robust choice for those looking to save on rental fees and want a high-performance modem. It supports the latest DOCSIS 3.1 standard, making it 10 times faster than the older DOCSIS 3.0, and offers excellent security features. It is compatible with major ISPs like Comcast Xfinity, Cox, and Spectrum, and supports internet speed plans up to 2.5 Gbps, which makes it future-proof for upcoming multi-gigabit internet plans.
Rating
8.8
Speed Tier Compatibility
ISP Compatibility
Future-Proofing
Most important from
639 reviews
#3
ARRIS (G36-RB) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1.2 Gbps Max Speeds - Renewed
The ARRIS G36-RB cable modem router combo is a solid choice for users who need a device approved for Comcast Xfinity, Cox, and Spectrum internet services. It utilizes the latest DOCSIS 3.1 standard, ensuring compatibility with multi-gigabit internet speeds up to 1.2 Gbps, making it suitable for high-speed internet plans. The built-in router supports WiFi 6 (AX3000), providing robust wireless performance for multiple devices and improved coverage throughout your home.
Rating
8.5
Speed Tier Compatibility
Future-Proofing
Most important from
388 reviews
Top 6 Best Xfinity Cable Modems 2026 in the United States
#1
Winner
Arris (G20) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1.0 Gbps Max Speeds, Next-Generation Upload Optimized
Arris (G20) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1.0 Gbps Max Speeds, Next-Generation Upload Optimized
DOCSIS Standard: DOCSIS 3.1
Speed Tier Compatibility: 1.0 Gbps
Built-in Router: Yes
ISP Compatibility: Comcast Xfinity, Cox, Spectrum
Future-Proofing: Yes
Chosen by 1175 this week
Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required
Arris Surfboard S34 DOCSIS 3.1 Multi‑Gig Cable Modem | 2.5Gbps + 1Gbps Ethernet Ports | Xfinity, Cox, Spectrum for Cable Internet Plans up to 2.5Gbps Next Gen Upstream. Modem Only, Router Required
DOCSIS Standard: DOCSIS 3.1
Speed Tier Compatibility: up to 2.5 Gbps
Built-in Router: No
ISP Compatibility: Comcast Xfinity, Cox, Spectrum
Ethernet Ports: 2 ports: 2.5 Gbps, 1 Gbps
Future-Proofing: Supports multi-gigabit plans
ARRIS (G36-RB) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1.2 Gbps Max Speeds - Renewed
ARRIS (G36-RB) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000), Approved for Comcast Xfinity, Cox, Spectrum & More, 1.2 Gbps Max Speeds - Renewed
DOCSIS Standard: DOCSIS 3.1
Speed Tier Compatibility: up to 1.2 Gbps
Channel Bonding: 4 OFDM channels
Built-in Router: WiFi 6 (AX3000)
ISP Compatibility: Comcast Xfinity, Cox, Spectrum
Ethernet Ports: four 2.5 Gbps Ethernet ports
Future-Proofing: DOCSIS 3.1 and WiFi 6
Motorola B12 - Advanced Compact Cable Modem | Pairs with Any WiFi Router | Supports Comcast Xfinity, Cox, Spectrum | 2500 Mbps Max | DOCSIS 3.1 | 2.5 Gbps Port | Nex Gen MB8611
Motorola B12 - Advanced Compact Cable Modem | Pairs with Any WiFi Router | Supports Comcast Xfinity, Cox, Spectrum | 2500 Mbps Max | DOCSIS 3.1 | 2.5 Gbps Port | Nex Gen MB8611
DOCSIS Standard: 3.1
Speed Tier Compatibility: Up to 2.5 Gbps
Channel Bonding: 32 down, 8 up channels
Built-in Router: No
ISP Compatibility: Comcast, Cox, Spectrum
Ethernet Ports: 2
Future-Proofing: Yes
NETGEAR Cable Modem WiFi Router Combo C6300 | Compatible with Cable Providers Including Xfinity by Comcast, Spectrum, Cox for Cable Plans Up to 400Mbps | AC1750 WiFi Speed | DOCSIS 3.0
NETGEAR Cable Modem WiFi Router Combo C6300 | Compatible with Cable Providers Including Xfinity by Comcast, Spectrum, Cox for Cable Plans Up to 400Mbps | AC1750 WiFi Speed | DOCSIS 3.0
DOCSIS Standard: DOCSIS 3.0
Speed Tier Compatibility: Up to 400 Mbps
Channel Bonding: 16 down, 4 up channels
Built-in Router: Yes, dual-band WiFi, beamforming
ISP Compatibility: Xfinity, Spectrum, Cox
Ethernet Ports: Four Gigabit Ethernet ports
Future-Proofing: No DOCSIS 3.1 support
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Buying Guide for the Best Xfinity Cable Modems
Choosing the right cable modem for your Xfinity service is crucial for ensuring you get the best internet performance and reliability. A good modem can enhance your internet speed, reduce latency, and provide a stable connection for all your online activities. When selecting a cable modem, it's important to consider several key specifications to ensure it meets your needs and is compatible with your Xfinity service. Here are the key specs to look at and how to navigate them.DOCSIS StandardDOCSIS (Data Over Cable Service Interface Specification) is the technology that allows high-speed data transfer over cable TV systems. 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, which is sufficient for standard internet usage, streaming, and gaming. DOCSIS 3.1 is the latest standard and supports speeds up to 10 Gbps, making it ideal for heavy internet users, large households, or those who want to future-proof their setup. Choose DOCSIS 3.1 if you need the highest speeds and best performance, otherwise, DOCSIS 3.0 should suffice.
Speed Tier CompatibilityYour modem needs to support the speed tier of your Xfinity internet plan. Xfinity offers various speed tiers, and your modem should be capable of handling the maximum speed of your plan. For example, if you have a 400 Mbps plan, ensure your modem can support at least 400 Mbps. Modems are often labeled with their maximum download and upload speeds, so match these with your internet plan to ensure optimal performance.
Channel BondingChannel bonding refers to the number of downstream and upstream channels a modem can use simultaneously. More channels mean better performance and higher speeds. For example, a modem with 16x4 channel bonding has 16 downstream and 4 upstream channels. For most users, 16x4 or 24x8 channel bonding is sufficient. However, if you have a high-speed plan or multiple users, consider a modem with 32x8 or higher channel bonding to ensure smooth and fast internet access.
Built-in RouterSome cable modems come with a built-in router, providing both modem and Wi-Fi capabilities in one device. This can save space and reduce the number of devices you need. However, built-in routers may not offer the same performance or features as standalone routers. If you have a large home, multiple devices, or need advanced features like parental controls or guest networks, you might prefer a separate modem and router. For simpler setups or smaller homes, a modem-router combo can be convenient and cost-effective.
ISP CompatibilityNot all modems are compatible with all internet service providers (ISPs). Ensure the modem you choose is approved for use with Xfinity. Xfinity provides a list of compatible modems on their website. Using a compatible modem ensures you get the best performance and support from your ISP. Check the modem's packaging or product description for compatibility information before purchasing.
Ethernet PortsEthernet ports allow you to connect wired devices directly to your modem for a more stable and faster connection. Most modems come with at least one Ethernet port, but some have multiple ports. If you have several devices that require a wired connection, such as gaming consoles, smart TVs, or desktop computers, consider a modem with multiple Ethernet ports. This can help reduce network congestion and improve overall performance.
Future-ProofingTechnology is always advancing, and internet speeds are continually increasing. Choosing a modem that supports the latest standards and higher speeds can help future-proof your setup. This means you won't need to upgrade your modem as frequently, saving you money in the long run. Consider your current and future internet needs, and choose a modem that can handle potential upgrades in your internet plan or the number of connected devices in your home.