10 Best Optimum Online Compatible Modems 2025 in the United States

The ARRIS G20 is a versatile cable modem router combo designed to handle high-speed internet with ease. Utilizing the latest DOCSIS 3.1 technology, it promises speeds up to 1.0 Gbps, making it apt for activities like HD streaming, online gaming, and heavy downloading. It also supports Wi-Fi 6 (AX3000), which means you can connect multiple devices without worrying about speed drops or lag.

This modem is compatible with major U.S. cable providers such as Comcast Xfinity, Cox, and Spectrum, making it a convenient choice for many users. The device also aims to save users money on rental fees and comes with a straightforward setup process via the SURFboard Central App, which offers enhanced parental controls and real-time device monitoring.

On the downside, the ARRIS G20's optimal upload features depend on the service provider's support, which might not be available everywhere. Although it offers many advanced functionalities, its price point might be higher compared to some other models without built-in routers. If you are looking for a reliable, high-speed, multi-device internet solution, and want to avoid rental fees, this modem-router combo is worth considering.

The NETGEAR Nighthawk CAX30 Modem Router Combo is a robust option for those needing a reliable and fast internet connection. It supports the latest DOCSIS 3.1 standard, which ensures high-speed data transmission and is suitable for cable plans up to 2Gbps. The device also features 32x8 channel bonding, contributing to its impressive speed capabilities of up to 2.7Gbps with WiFi 6 technology, providing excellent coverage up to 2,500 sq. ft. and support for up to 25 devices simultaneously.

This makes it a great choice for homes with multiple users who engage in bandwidth-heavy activities like gaming and streaming. The inclusion of four gigabit Ethernet ports and a USB 3.0 port offers versatile connectivity for various wired devices. However, it is important to note that this modem is not compatible with DSL providers, Verizon, AT&T, DirecTV, DISH, or any bundled voice services, which could limit its usability for some users. Additionally, it replaces both your modem and router, potentially saving up to $168 per year in rental fees.

The Nighthawk app simplifies setup and management, while the NETGEAR Armor software provides enhanced security features out of the box, though the full suite requires a subscription after a 30-day trial. The high performance and security features are big pluses, but the initial cost might be a consideration for budget-conscious buyers. The device's size and weight might also be bulkier compared to other models. Despite these minor shortcomings, the NETGEAR Nighthawk CAX30 stands out as a powerful and efficient modem router combo, particularly for those with high-speed internet plans and a need for comprehensive security features.

The ARRIS SB8200 is a robust DOCSIS 3.1 cable modem, designed for high-speed internet access with compatibility for major U.S. cable providers such as Comcast Xfinity, Cox, and Spectrum. This modem offers a maximum internet speed of 1 Gbps and features four OFDM channels for improved performance. Ideal for users looking to enhance their home connectivity, it supports HD multimedia streaming and reduces lag, which is beneficial for gaming and heavy internet usage.

A notable feature is its potential to save users up to $168 per year in rental fees by owning the modem outright. Additionally, the modem includes two 1-Gigabit Ethernet ports, allowing for direct connection to a Wi-Fi router or wired devices, expanding its usability. However, it's important to note that this device does not have a built-in router, so users will need to invest in a separate Wi-Fi router for wireless networking.

The SB8200 is easy to set up with the SURFboard Central App and comes with dedicated customer support for assistance. While it is compatible with numerous internet service providers, users should confirm compatibility with their ISP. The lack of telephone ports may be a drawback for users needing VoIP services. Despite this, the ARRIS SB8200 is a strong contender for those seeking a high-performance modem for optimum online compatibility.