Best cable modems for Comcast Xfinity
Researched by Deal.ai's shopping agent across stores on November 12, 2026. Prices below are today's.
Top pick: NETGEAR Nighthawk CM3000 (2.5G). It's the modem to buy if you're on Xfinity's faster tiers — DOCSIS 3.1 with a 2.5 Gbps port so it won't bottleneck multi-gig plans, and it's the best-reviewed of the bunch.
Who the others suit:
- Hitron CODA56 — a solid multi-gig alternative with a big review base; good if you want 2.5G without paying Nighthawk money.
- NETGEAR CM1000 — the value choice for standard 1 Gbps Xfinity plans; no multi-gig port, so skip it if you're upgrading speed.
- ARRIS SURFboard S34 — cheap way into DOCSIS 3.1 with 2.5 Gbps, but buy from a reputable seller and confirm the listing is new.
- Motorola MB8611 — fine hardware, but thin reviews and a high asking price here.
Check Xfinity's approved-device list for your exact speed tier before you buy.
The picks
- #1
NETGEAR Nighthawk CM3000 2.5G DOCSIS 3.1 Cable Modem
- Cable Modem DOCSIS: 3.1
- Color: Black
- Type: Modem
- DOCSIS Certification: 3.1
- Number of LAN Ports: 2
- Wired Speed: 2.5 Gbps
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