What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
There is no single best modem for every household: the right choice is a cable modem approved by your internet provider and rated for your subscribed speed tier. Check your provider’s current compatibility list before buying; then decide whether you want a modem-only device and a separate Wi-Fi router, or an all-in-one gateway.
How to choose a modem that will work for you
- Confirm your connection type. The candidates below are cable modems. Do not assume one will work with a different type of service, such as fiber or DSL.
- Check your provider’s current compatibility lookup. Use the lookup for your provider and, where available, your service address. Xfinity advises customers to check both device compatibility and speed support before purchase: Xfinity’s approved-device guidance. Cox also advises matching a modem to the subscribed plan: Cox’s modem guidance. A retailer’s “works with major providers” claim is not a substitute for provider approval.
- Match the modem to your speed tier. Provider approval does not necessarily mean a modem supports every speed tier that provider sells. Verify that the exact model is approved for your plan’s download and upload speeds.
- Check the Ethernet connection. Compare the modem’s Ethernet port capability with your plan and the router you intend to use. A fast modem cannot deliver its full potential if another part of the connection is a bottleneck.
- Choose modem-only or gateway. A standalone modem requires a separate router for Wi-Fi. An all-in-one gateway combines modem and router functions; neither format is universally faster based on the available provider guidance.
- Compare the full cost. Check current local equipment prices and your account’s terms, including any provider equipment charge. Fees and terms vary, so confirm them directly rather than relying on an old price comparison.
Modem candidates to compare
A February 2026 Tom’s Guide comparison names these cable modem candidates. Treat them as a shortlist for checking—not universal winners or evidence of hands-on testing. Specifications below are product-listing figures reported by that guide, not measured real-world throughput; actual speeds depend on the ISP service and the provider’s authorization for your account. Tom’s Guide’s modem comparison.
As an Amazon Associate I earn from qualifying purchases.
| Model | What the comparison reports | What to verify before buying |
|---|---|---|
| ARRIS SURFboard S34 | DOCSIS 3.1; advertised up to 2.5 Gbps download and 444 Mbps upload in the guide’s product listing. | Current provider approval, support for your exact speed tier, and Ethernet compatibility with your router. |
| Hitron CODA56 | DOCSIS 3.1; listed up to 2.5 Gbps download and 1 Gbps upload in the guide’s product listing. | Current provider approval, support for your exact speed tier, and Ethernet compatibility with your router. |
| NETGEAR Nighthawk CM3000 | Listed for multi-gig use, with up to 2.5 Gbps download and 1 Gbps upload in the guide’s product listing. | Current provider approval, support for your exact speed tier, and Ethernet compatibility with your router. |
These advertised capabilities do not guarantee that an ISP will authorize the same speeds on a particular plan or account. Check the provider list for the exact model and your service before ordering.
Free tools Windows power users keep installed
One-click scans. No signup required.
Do you need a separate router?
Yes, if you buy a modem-only device and want Wi-Fi. The modem connects your home to the cable service; a router creates the local network and provides wireless access. If you already own a router, check that its ports and wireless capabilities suit your plan. For faster plans using a separate router, Cox recommends at least a Wi-Fi 6 generation router: Cox’s modem guidance.
#1 Best Overall
- CABLE INTERNET AND WIFI MADE FOR YOUR HOME: This two-in-one cable modem and WiFi router puts every setting in your hands, from your WiFi names and passwords to how your network runs, so it works the way your household needs.
- APPROVED FOR YOUR PROVIDER AND PLAN: Works with Xfinity internet plans up to 800Mbps and Cox plans up to 500Mbps. Not compatible with Verizon, AT&T, CenturyLink, DirecTV, DISH, or bundled voice plans. ISP activation required after setup.
- GET THE FULL SPEED OF PLANS UP TO 800 MBPS: DOCSIS 3.0 delivers plenty of speed for HD and 4K streaming, online gaming, and video calls across your home. Actual speeds vary by plan and provider.
- AC1900 WIFI COVERAGE FOR THE WHOLE HOME: Stay connected in every room with dual-band AC1900 WiFi covering up to 1,800 sq ft and Beamforming+ for stronger signal to mobile devices. Real-world coverage depends on home size, layout, and building materials.
- WIRED CONNECTIONS FOR YOUR FASTEST DEVICES: Four Gigabit Ethernet ports keep gaming consoles, desktops, and streaming devices hardwired for the lowest latency and the most stable connection in your home.
A gateway combines modem and router functions in one device and can reduce the number of boxes. A separate modem and router give you the option to select or replace those parts independently. The provider guidance here does not establish that one setup always performs better, so choose based on your provider’s approved equipment, existing network gear, and preference for a combined or separate setup.
What about DOCSIS 4.0?
Do not assume DOCSIS 4.0 equipment is broadly available or eligible across the United States. Deployment and device eligibility depend on the market and provider. Confirm what your ISP supports at your address before choosing a DOCSIS generation; the named comparison candidates above are not evidence of nationwide DOCSIS 4.0 availability.
Rank #2
- CABLE INTERNET AND WIFI MADE FOR YOUR HOME: This two-in-one cable modem and WiFi router puts every setting in your hands, from your WiFi names and passwords to how your network runs, so it works the way your household needs.
- APPROVED FOR YOUR PROVIDER AND PLAN: Works with Xfinity internet plans up to 800Mbps, Spectrum up to 1Gbps, and Cox up to 1Gbps. Not compatible with Verizon, AT&T, CenturyLink, DirecTV, DISH, or bundled voice plans. ISP activation required after setup.
- GET THE FULL SPEED OF YOUR PLAN: DOCSIS 3.1 supports Gigabit+ cable internet plans, so large downloads finish faster and 4K streaming, gaming, and video calls can all run at once. Actual speeds vary by plan and provider.
- WIFI 6 COVERAGE FOR THE WHOLE HOME: Stay connected in every room with dual-band AX2700 WiFi 6 covering up to 2,000 sq ft and capacity for 25+ connected devices. Real-world coverage depends on home size, layout, and building materials.
- WIRED CONNECTIONS FOR YOUR FASTEST DEVICES: Four Gigabit Ethernet ports keep gaming consoles, desktops, and streaming devices hardwired for the lowest latency and the most stable connection in your home.
When should you keep or replace your current modem?
If your current modem is approved for your provider and supports your subscribed speed tier, changing it is not automatically necessary. Consider a replacement when the device is no longer supported, cannot handle your plan, or you need a feature your current setup lacks. Before buying, check whether the issue is actually the modem: a router limitation, Wi-Fi coverage problem, or service fault can also affect the experience.
Provider device lists can change, and approval may depend on the exact model and plan. Recheck the current list at purchase time, even if a model appeared on an earlier comparison or retailer page.
Quick Recap
Best Value
- MAXIMIZE YOUR CABLE INTERNET AND WHOLE-HOME WIFI: A cable modem and WiFi router in one device unlocks the full potential of your home internet with faster downloads, smoother WiFi for gaming and video calls, and reliable coverage in every room.
- APPROVED FOR YOUR PROVIDER AND PLAN: Works with Xfinity internet plans up to 800Mbps, Spectrum up to 1Gbps, and Cox up to 1Gbps. Not compatible with Verizon, AT&T, CenturyLink, DirecTV, DISH, or bundled voice plans. ISP activation required after setup.
- MULTI-GIG DOCSIS 3.1 SPEEDS: Get Gigabit+ cable download speeds on today's fastest plans, with headroom for the upgrades ahead. Real-world speeds depend on your plan and ISP network.
- WIFI 6 COVERAGE FOR THE WHOLE HOME: Stay connected in every room with dual-band AX6000 WiFi 6 covering up to 2,500 sq ft and capacity for 30+ connected devices across your home. Real-world coverage depends on home size, layout, and building materials.
- MULTI-GIG WIRED CONNECTIONS FOR YOUR FASTEST DEVICES: One 2.5 Gig Multi-Gig port and four Gigabit Ethernet ports keep gaming consoles, desktops, and streaming devices hardwired for the lowest latency and the most stable connection in your home.
Rank #4
- input voltage：100 -240V
- SAVE MONTHLY RENTAL FEES: Model C7000 replaces your cable modem and WiFi router saving you up to $150/yr in equipment rental fees. System Requirements Cable broadband Internet service, Check your cable Internet service provider web site for data speed tier compatibility, Not compatible with Cable bundled voice services.
- BUILT FOR FAST SPEED: Best for cable provider plans up to 800 Mbps speed
- FAST Wi Fi PERFORMANCE: Get up to 1800 sq ft wireless coverage and 30 devices connected
- VERSATILE CONNECTIONS: 4 Gigabit Ethernet ports give you fast wired connections to your computer,, game box, and other devices. One USB port for storage devices.
Rank #3
- MultiGig speed for today & tomorrow: DOCSIS 3.1 performance supports cable internet plans up to 2.5 Gbps, delivering ultrafast streaming, gaming, and downloads.
- Save on rental fees: Own your modem and avoid monthly equipment charges - check with your cable provider for plan compatibility.
- Compact, modern design: Space saving footprint with simple LED indicators for power, upstream/downstream, and online status.
- Easy setup: Connect cable, power on, and activate with your cable provider. Then join the default Wi-Fi or personalize your own Wi-Fi network name and password.
- Wi-Fi 6 Coverage: Includes dual-band W-Fi 6 (AX3000) delivering up to 3 Gbps wireless performance for your whole home.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
