FindBetterInternet

California  /  South San Francisco  /  Astound vs Xfinity
AstoundvsXfinity

Astound vs Xfinity in South San Francisco

Xfinity offers broader reach and faster uploads, while Astound makes its 1,500/50 Mbps cable tier available across more of the city.

The 30-Second VerdictUpdated September 21, 2026

Xfinity is the better overall pick because it reaches about 94% of South San Francisco, offers stronger upload speeds where available, and starts at the same $40/mo as Astound. Xfinity wins on coverage and top-end performance: its 2,000/300 Mbps plan reaches about 53% of the city. Astound wins on availability for its 1,500/50 Mbps plan, which reaches about 68%, while both providers have a 91/100 speed score. Choose Xfinity for heavier work, gaming, or multiple users; choose Astound for broader access to a solid cable tier at the same starting price.

At a glance

Astound vs. Xfinity, side by side.

ProviderTypeTop speedCity coverageStarting priceBest for
AstoundAstound Cable 1 Gig
50 Mbps upload
68% $40/moBudget-friendly
XfinityXfinity Cable 2 Gig
300 Mbps upload
94% $40/moFastest plans here

Coverage map

Two different questions, two views. Top speed shows who offers the faster plan where you can actually get it. Coverage shows who reaches more of each ZIP. Or pick a single provider to see just its footprint.

View
Showing the provider with the faster available plan in each ZIP. Click any ZIP for the breakdown.

Neighborhood breakdown

The head-to-head can change from block to block because availability varies across South San Francisco. Xfinity reaches about 94% of the city overall, while Astound reaches about 68%; however, Astound’s 1,500/50 Mbps plan reaches about 68% and Xfinity’s 2,000/300 Mbps plan reaches about 53%, so check your exact address.

ZIPNeighborhoodsCoverageTop speedRank scoreWinner
AstoundXfinityAstoundXfinityAstoundXfinity
94080 Sunshine Gardens, Sign Hill, Downtown South San Francisco, Westborough 85%99%2 Gig2 Gig5579 Xfinity

Rank score (0–100) is each provider’s Speed Score, discounted for weak upload, times the share of that ZIP it reaches — the same rule that orders providers on the South San Francisco city page, so it moves as availability changes street to street.

Which is better for…

The right pick comes down to what you actually do online.

Gaming
Xfinity
Xfinity is the stronger choice where available because its 2,000/300 Mbps plan reaches about 53% of the city, offering much more upload capacity for multiplayer gaming, updates, and shared connections.
Streaming
Xfinity
Xfinity wins where available with its 2,000/300 Mbps plan, which reaches about 53% of the city and leaves more room for several simultaneous 4K streams.
Video calls
Xfinity
Xfinity offers 300 Mbps upload on its 2,000/300 Mbps plan, which reaches about 53% of the city; Astound offers 50 Mbps upload on its 1,500/50 Mbps plan, which reaches about 68%. The extra upload capacity gives Xfinity more room for work calls and other household traffic.
Just the basics
Astound
Astound is enough for browsing, email, ordinary streaming, and occasional calls, and its 1,500/50 Mbps plan reaches about 68% of the city. Its $40/mo starting price is the same as Xfinity’s, so check availability and current terms before choosing.

Get connected

Pick your provider and check availability at your address.

Top speed1 Gig
Upload50 Mbps
Coverage68%
From$40/mo
  • 1 Gig down · 50 Mbps up Cable
Top speed2 Gig
Upload300 Mbps
Coverage94%
From$40/mo
  • 2 Gig down · 300 Mbps up Cable
  • 1 Gig down · 35 Mbps up Cable

See what’s actually available at your address

Coverage changes from one street to the next. Check your exact address in seconds.

Check my address
← See all internet providers in South San Francisco

Frequently asked questions

Is Astound or Xfinity available at my South San Francisco address?

Xfinity reaches about 94% of South San Francisco overall, while Astound reaches about 68%. Availability can vary block to block, so enter your exact address with each provider before deciding.

Which is cheaper, Astound or Xfinity, and what will I actually pay?

Both Astound and Xfinity start at $40/mo, but those are promotional starting rates. Confirm the post-promo rate, equipment fees, and any contract before signing, then compare the full terms for your address.

Which is faster for gaming, working from home, or 4K streaming?

Xfinity’s 2,000/300 Mbps plan reaches about 53% of the city, while Astound’s 1,500/50 Mbps plan reaches about 68%. Xfinity is the better performance choice where available, but check which tier your address can actually receive.

How we compare. Coverage is the share of a ZIP where a provider offers a genuinely good plan (≥ 1 Gbps download, ≥ 20 Mbps upload, non-satellite), from FCC Broadband Map serviceability data. “Fastest available” ranks the providers present in a ZIP by top advertised download speed. Pricing reflects current promotional starting rates. Provider order and each ZIP’s winner follow the site’s one ranking rule (Speed Score, discounted for weak upload, times coverage); read the full methodology.