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Quantum Fiber vs Xfinity in Westminster
Quantum Fiber offers faster symmetrical speeds for less money, but only where its fiber reaches; Xfinity covers nearly every Westminster address.
Quantum Fiber wins on raw performance and price: up to 8,000/8,000 Mbps symmetrical for $30/mo with a 99/100 speed score is hard to beat, but it only reaches about 51% of Westminster. Xfinity costs $40/mo and tops out at 2,000/300 Mbps (95/100), yet it covers roughly 99% of the city. Get Quantum Fiber if it’s live at your address and you want the best speed for less. Choose Xfinity if fiber hasn’t reached your block and you need a reliable, widely available connection today.
At a glance
Quantum Fiber vs. Xfinity, side by side.
| Provider | Type | Top speed | City coverage | Starting price | Best for |
|---|---|---|---|---|---|
| Quantum Fiber |
Fiber | 8 Gig 8 Gig upload |
51% | $30/mo | Top fiber speeds |
| Xfinity |
Cable | 2 Gig 300 Mbps upload |
99% | $40/mo | Widest availability |
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.
Neighborhood breakdown
Coverage varies block to block in Westminster, so the head-to-head really depends on your exact address. Xfinity’s ~99% cable footprint reaches nearly every neighborhood, while Quantum Fiber’s ~51% fiber build serves only about half the city. Check both at your specific address before deciding.
| ZIP | Neighborhoods | Coverage | Top speed | Speed Score | Winner | |||
|---|---|---|---|---|---|---|---|---|
| Quantum Fiber | Xfinity | Quantum Fiber | Xfinity | Quantum Fiber | Xfinity | |||
| 80031 | Legacy Ridge, The Ranch, Countryside, Northwest Commons | 37% | 100% | 8 Gig | 2 Gig | 87 | 96 | Xfinity |
| 80030 | Harris Park, Sunset Ridge, Westminster Downtown | 71% | 99% | 8 Gig | 2 Gig | 93 | 96 | Xfinity |
| 80035 | Standley Lake, Ranch Reserve, Bradburn Village | 6% | 100% | 2 Gig | 2 Gig | 80 | 96 | Xfinity |
| 80036 | Westminster (PO Box service area) | 73% | 100% | 2 Gig | 2 Gig | 94 | 96 | Xfinity |
Speed Score (0–100) blends each provider’s coverage and top speed in that specific ZIP, so it moves as availability changes street to street.
Which is better for…
The right pick comes down to what you actually do online.
Get connected
Pick your provider and check availability at your address.
- 8 Gig down · 8 Gig up Fiber
- 2 Gig down · 1 Gig up Fiber
- 1 Gig down · 1 Gig up Fiber
- 2 Gig down · 300 Mbps up Cable
- 2 Gig down · 300 Mbps up Fiber
- 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 addressFrequently asked questions
Can I get Quantum Fiber at my address in Westminster?
Maybe — Quantum Fiber covers about 51% of Westminster, versus roughly 99% for Xfinity, so fiber is available at only about half of addresses. Enter your exact street address on both providers’ sites to confirm which service actually reaches your home.
Which is cheaper in Westminster, Quantum Fiber or Xfinity?
Quantum Fiber starts at $30/mo versus Xfinity’s $40/mo, so fiber is the cheaper starting price. Note these are promotional starting rates, so before signing confirm the post-promo rate, any equipment fees, and whether a contract is required.
Is Quantum Fiber or Xfinity fast enough for gaming, working from home, and 4K?
Both are fast enough: Quantum Fiber reaches up to 8,000/8,000 Mbps (speed score 99/100, where available) and Xfinity up to 2,000/300 Mbps (speed score 95/100). For heavy uploads like video calls or backups, Quantum Fiber’s symmetrical speeds win, so weigh your upload needs when choosing.