Best Internet Providers in
san mateo, California

In 2026, primary wired providers in San Mateo include AT&T Fiber, Xfinity, and Sonic. Plans and availability vary by address, with speeds up to 10,000 Mbps.

Top Internet Providers in San Mateo, California

AT&T Fiber pricing reflects standalone base plans without mobile bundling; promotional bundle rates may be lower when paired with qualifying wireless lines.

Starting prices for Xfinity and Astound Broadband reflect introductory promotional rates that may adjust after initial term periods.

T-Mobile Home Internet pricing includes enrollment in eligible AutoPay programs.

EarthLink starting pricing of $39.95/mo applies to lower introductory speed tiers; multi-gigabit options carry higher monthly plan rates. Symmetrical upload and download speeds are delivered over pure fiber infrastructure; cable and fixed wireless networks operate with asymmetrical upload speeds.

Nearby Cities & Regional Coverage

Burlingame | Foster City | Belmont | San Carlos | Redwood City | Millbrae | San Bruno | South San Francisco | San Francisco

Quick Guide: Finding the Right San Mateo Plan

San Mateo, California, features a highly competitive broadband market across the Peninsula, where available connection types, plan speeds, and monthly rates depend directly on the physical infrastructure connected to a given address.

• AT&T Fiber — Fiber Internet: Delivers dedicated optical fiber connections to properties in select sections of San Mateo, advertising symmetrical download and upload speeds reaching up to 5,000 Mbps. Base standalone fiber tiers generally start around $55.00/mo. In locations where pure optical lines have not been installed, traditional IPBB/DSL or wireless options may be available instead.
• Xfinity — Cable Internet: Operates an established hybrid fiber-coaxial network across San Mateo. Advertised download speeds reach up to 2,000 Mbps on top-tier packages, with starter packages generally beginning around $40.00/mo. Cable connections deliver fast downstream performance, though upload bandwidth remains asymmetrical compared to pure fiber. Availability varies by address.
• Sonic — Fiber Internet: Supplies high-speed fiber-to-the-home connectivity in select neighborhoods, advertising symmetrical speeds up to 10,000 Mbps. Plans start around $49.99/mo with no contracts or data limits, offering an independent multi-gig alternative where its fiber network has been deployed.
• Astound Broadband — Cable and Fiber: Provides cable and fiber-delivered internet service in select areas of San Mateo, with advertised download speeds reaching up to 1,500 Mbps. Promotional introductory rates start around $25.00/mo on entry tiers, serving as an alternative wired option where lines exist.
• EarthLink — Fiber and Wireless: Provides fiber-optic and wireless connections in select sections of San Mateo. While EarthLink advertises speeds up to 5,000 Mbps, introductory plans starting at $39.95/mo apply to baseline tiers; higher speed tiers require separate multi-gig pricing.
• T-Mobile 5G Home — Fixed Wireless: Uses the cellular network to deliver home internet without physical exterior line drops. Advertised typical download speeds reach up to 498 Mbps starting at $50.00/mo with AutoPay, providing a contract-free, self-installed option for renters and residents seeking simple setup.