Best Internet Providers in South San Francisco, CA (2026)
South San Francisco residents enjoy strong broadband competition with 7 providers. Xfinity covers 97.7% and AT&T fiber reaches 89.3% of the city.
Get connected today: 1-844-963-0138
Quick Answer: Best Internet in South San Francisco
Xfinity and AT&T are the two dominant providers in South San Francisco, each covering the vast majority of the city. Xfinity offers cable and fiber up to 2 Gbps, while AT&T delivers symmetric fiber speeds up to 5 Gbps.
- Best overall: Xfinity -- cable/fiber up to 2,000 Mbps, 97.7% coverage
- Best fiber: AT&T Internet -- up to 5 Gbps, 89.3% coverage
- Best budget: T-Mobile 5G -- $50/mo, no caps, 65.4% coverage
- Best alt fiber: Verizon Fios -- up to 940 Mbps, 36.8% coverage
- Best satellite: Starlink -- 220 Mbps, 100% availability
South San Francisco Internet Providers Comparison
| Provider | Technology | Max Speed | Starting Price | Data Cap | Contract | Call |
|---|---|---|---|---|---|---|
| Xfinity | Cable, Fiber | 2,000 Mbps | $19.99/mo | 1.2 TB | None | 1-844-963-0138 |
| AT&T Internet | Fiber, DSL | 5,000 Mbps | $55/mo | None (Fiber) | None | 1-855-850-5977 |
| T-Mobile | 5G, Fixed Wireless | 245 Mbps | $50/mo | None | None | 1-844-275-9311 |
| Verizon Fios | Fiber | 940 Mbps | $49.99/mo | None | None | 1-855-387-1456 |
| HughesNet | Satellite | 100 Mbps | $49.99/mo | 100 GB | None | 1-855-543-5405 |
| Viasat | Satellite | 150 Mbps | $49.99/mo | 40-300 GB | 2 Years | 1-855-463-9333 |
| Starlink | Satellite | 220 Mbps | $120/mo | 1 TB (Priority) | None | Online only |
Top South San Francisco Internet Providers Reviewed
Xfinity -- Best Overall in South San Francisco
Xfinity blankets 97.7% of South San Francisco with cable and fiber. Speeds range from 75 Mbps to 2,000 Mbps with plans starting at $19.99/mo and no annual contract.
Plans: Connect (75 Mbps, $19.99/mo) | Connect More (200 Mbps, $35/mo) | Fast (400 Mbps, $55/mo) | Gigabit (1,000 Mbps, $75/mo)
Choose if: You want near-universal coverage with multiple speed tiers.
Avoid if: You need unlimited data without an add-on charge.
Call Xfinity: 1-844-963-0138
AT&T Internet -- Best Fiber in South San Francisco
AT&T covers 89.3% of South San Francisco with fiber and DSL. Fiber plans provide symmetric speeds up to 5 Gbps with unlimited data and no annual contracts.
Plans: Internet 300 (300 Mbps, $55/mo) | Internet 500 (500 Mbps, $65/mo) | Internet 1000 (1 Gbps, $80/mo) | Internet 2000 (2 Gbps, $150/mo)
Choose if: You want the fastest symmetric speeds with unlimited data.
Avoid if: Only AT&T DSL is available at your address.
Call AT&T: 1-855-850-5977
Verizon Fios -- Premium Fiber Alternative
Verizon Fios covers 36.8% of South San Francisco with dedicated fiber. All plans include no data caps and no annual contracts with symmetric speeds up to 940 Mbps.
Plans: 300 Mbps ($49.99/mo) | 500 Mbps ($69.99/mo) | Gigabit ($89.99/mo)
Choose if: You want an alternative fiber provider with proven reliability.
Avoid if: Fios is not available at your specific address.
Call Verizon: 1-855-387-1456
T-Mobile 5G -- Best Budget Wireless
T-Mobile covers 65.4% of South San Francisco with 5G and fixed wireless at $50/mo. No data caps, no contracts, and quick plug-and-play setup.
Plans: Home Internet (245 Mbps, $50/mo)
Choose if: You want simple affordable internet without commitments.
Avoid if: You need guaranteed speeds above 200 Mbps.
Call T-Mobile: 1-844-275-9311
Speed Tiers Available in South San Francisco
| Speed Tier | Xfinity | AT&T | Verizon Fios | T-Mobile |
|---|---|---|---|---|
| Basic (75 Mbps) | $19.99/mo | -- | -- | -- |
| Mid (200-300 Mbps) | $35/mo | $55/mo | $49.99/mo | $50/mo |
| Fast (400-500 Mbps) | $55/mo | $65/mo | $69.99/mo | -- |
| Gigabit (940-1,000 Mbps) | $75/mo | $80/mo | $89.99/mo | -- |
| Multi-Gig (2,000+ Mbps) | $100/mo | $150/mo | -- | -- |
Speed guide: Email/browsing: 75 Mbps | HD streaming: 300 Mbps | Remote work + 4K: 500 Mbps | Multi-device/smart home: 1 Gbps
Internet Service in South San Francisco, CA
South San Francisco is a city of about 66,105 people in San Mateo County, known as "The Industrial City" and a major biotech hub on the San Francisco Peninsula. High-speed internet is essential for the city's many tech-adjacent residents and remote workers.
Nearly all of South San Francisco has access to Xfinity cable and AT&T fiber, creating strong competition that benefits consumers. Verizon Fios adds a third fiber option in select neighborhoods. The city's density and proximity to Silicon Valley drive continued broadband investment.
Neighborhood Coverage Guide
- Downtown SSF: Full Xfinity and AT&T fiber coverage, Verizon Fios pockets
- Westborough: Xfinity and AT&T fiber strong, T-Mobile 5G available
- Oyster Point/Biotech area: AT&T fiber primary, business-grade options
- Sign Hill: Xfinity cable dominant, AT&T expanding
Nearby Cities
Internet Speed Requirements for South San Francisco Households
The speed you need in South San Francisco depends on how many people and devices use your connection simultaneously. A single person streaming video and browsing the web can get by with 50-100 Mbps. A household of 2-3 people with regular streaming and video calls should target 200-300 Mbps. Larger families with 4 or more heavy users benefit from 500 Mbps to 1 Gbps plans, especially when multiple people are streaming in 4K, gaming online, or working from home at the same time.
Upload speed matters just as much as download speed for South San Francisco residents who work remotely. Video conferencing platforms like Zoom and Teams require at least 5 Mbps upload for stable HD video, and 10 Mbps or more for group calls with screen sharing. If multiple household members participate in video calls simultaneously, ensure your plan provides at least 20-25 Mbps upload speed. Fiber plans offer the best upload performance with symmetrical speeds.
South San Francisco Internet FAQs
Who is the best internet provider in South San Francisco?
Xfinity is the best overall provider with 97.7% coverage offering cable and fiber speeds up to 2,000 Mbps. AT&T fiber covers 89.3% with symmetric speeds up to 5 Gbps.
Is AT&T fiber available in South San Francisco?
Yes. AT&T fiber covers 89.3% of South San Francisco with symmetric speeds up to 5 Gbps, no data caps, and no annual contracts starting at $55/mo.
What is the cheapest internet in South San Francisco?
Xfinity starts at $19.99/mo for 75 Mbps. T-Mobile 5G is $50/mo with unlimited data. AT&T fiber begins at $55/mo for 300 Mbps symmetrical.
Does Verizon Fios serve South San Francisco?
Verizon Fios covers about 36.8% of South San Francisco with fiber speeds up to 940 Mbps, no data caps, and no contracts.
How many internet providers are in South San Francisco?
South San Francisco has 7 internet providers: Xfinity, AT&T, T-Mobile, Verizon Fios, HughesNet, Viasat, and Starlink, spanning cable, fiber, 5G, DSL, and satellite.
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Last updated: February 7, 2026.
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