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Quantum Fiber vs Xfinity in Denver
Denver’s trade-off is Quantum Fiber’s faster symmetrical speeds where available versus Xfinity’s broader coverage and lower starting price.
Xfinity is the better overall pick because it reaches about 98% of Denver, starts at $40/mo, and offers stronger citywide availability, while Quantum Fiber starts at $50/mo. Quantum Fiber wins on speed where it reaches your address, especially for uploads; Xfinity wins on coverage and price. Quantum Fiber’s speed score is 99/100 versus Xfinity’s 92/100, but Xfinity’s broader availability matters for most shoppers. Choose Quantum Fiber if its fiber service is available and performance matters most; choose Xfinity for easier availability, lower starting cost, and everyday value.
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 |
70% | $50/mo | Top fiber speeds |
| Xfinity |
Cable | 2 Gig 300 Mbps upload |
98% | $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
The better choice can shift from block to block because availability varies across Denver neighborhoods and ZIP areas. Xfinity reaches about 98% of the city overall, while Quantum Fiber reaches about 70%, so check your exact address before relying on Quantum Fiber’s faster speeds.
| ZIP | Neighborhoods | Coverage | Top speed | Rank score | Winner | |||
|---|---|---|---|---|---|---|---|---|
| Quantum Fiber | Xfinity | Quantum Fiber | Xfinity | Quantum Fiber | Xfinity | |||
| 80220 | Hale, Montclair, Mayfair, East Colfax | 79% | 100% | 8 Gig | 2 Gig | 78 | 81 | Xfinity |
| 80219 | Westwood, Barnum, Mar Lee, Athmar Park | 93% | 100% | 2 Gig | 2 Gig | 92 | 81 | Quantum Fiber |
| 80216 | Globeville, Elyria-Swansea, River North (RiNo) | 61% | 94% | 8 Gig | 2 Gig | 60 | 76 | Xfinity |
| 80204 | Lincoln Park, Sun Valley, Villa Park, West Colfax | 69% | 98% | 8 Gig | 2 Gig | 68 | 80 | Xfinity |
| 80214 | Edgewater, West Colfax, Lakewood (Eiber) | 87% | 100% | 8 Gig | 2 Gig | 86 | 81 | Quantum Fiber |
| 80210 | University, Observatory Park, University Park, Rosedale | 90% | 100% | 8 Gig | 2 Gig | 89 | 81 | Quantum Fiber |
| 80205 | Five Points, Cole, Whittier, Clayton | 65% | 99% | 8 Gig | 2 Gig | 64 | 81 | Xfinity |
| 80226 | Lakewood, Belmar, Eiber | 79% | 100% | 8 Gig | 2 Gig | 79 | 81 | Xfinity |
| 80212 | West Highland, Berkeley, Regis | 95% | 100% | 8 Gig | 2 Gig | 94 | 81 | Quantum Fiber |
| 80221 | Federal Heights, Sherrelwood, Westminster (south), Berkeley | 78% | 98% | 8 Gig | 2 Gig | 78 | 79 | Xfinity |
| 80211 | Highlands, Sunnyside, Sloan’s Lake, LoHi (Lower Highlands) | 85% | 100% | 8 Gig | 2 Gig | 84 | 81 | Quantum Fiber |
| 80207 | Park Hill, North Park Hill, Northeast Park Hill | 82% | 98% | 8 Gig | 2 Gig | 82 | 79 | Quantum Fiber |
| 80232 | Lakewood, Meadowlark Hills, Green Gables | 61% | 100% | 8 Gig | 2 Gig | 61 | 81 | Xfinity |
| 80239 | Montbello, Green Valley Ranch, Gateway | 70% | 100% | 8 Gig | 2 Gig | 70 | 81 | Xfinity |
| 80222 | Virginia Village, University Hills, Goldsmith | 83% | 100% | 8 Gig | 2 Gig | 82 | 81 | Quantum Fiber |
| 80233 | Thornton, Northglenn | 52% | 99% | 8 Gig | 2 Gig | 51 | 81 | Xfinity |
| 80206 | Cheesman Park, Congress Park, City Park West, Cherry Creek North | 77% | 99% | 2 Gig | 2 Gig | 77 | 81 | Xfinity |
| 80246 | Glendale, Belcaro, Virginia Village | 60% | 100% | 8 Gig | 2 Gig | 60 | 81 | Xfinity |
| 80223 | Athmar Park, Ruby Hill, Baker, Overland | 70% | 95% | 8 Gig | 2 Gig | 70 | 77 | Xfinity |
| 80238 | Central Park, Stapleton, Northfield | 40% | 98% | 8 Gig | 2 Gig | 39 | 79 | Xfinity |
| 80228 | Green Mountain, Union Square, Lakewood | 46% | 98% | 8 Gig | 2 Gig | 46 | 79 | Xfinity |
| 80229 | Thornton, Northglenn, Welby | 39% | 98% | 8 Gig | 2 Gig | 39 | 79 | Xfinity |
| 80234 | Northglenn, Thornton | 5% | 99% | 8 Gig | 2 Gig | 5 | 81 | Xfinity |
| 80227 | Bear Valley, Green Mountain, Lakewood | 37% | 97% | 8 Gig | 2 Gig | 37 | 79 | Xfinity |
| 80260 | Northglenn, Sherrelwood, Welby | 12% | 100% | 8 Gig | 2 Gig | 12 | 81 | Xfinity |
| 80249 | Green Valley Ranch, Gateway, First Creek | 40% | 100% | 8 Gig | 2 Gig | 40 | 81 | Xfinity |
| 80209 | Washington Park, Baker, Country Club, Platt Park | 83% | 99% | 2 Gig | 2 Gig | 82 | 81 | Quantum Fiber |
| 80215 | Applewood, Lakewood, Rooney Valley | 80% | 99% | 2 Gig | 2 Gig | 79 | 81 | Xfinity |
| 80203 | Capitol Hill, Civic Center, North Capitol Hill, Golden Triangle | 63% | 100% | 8 Gig | 2 Gig | 62 | 81 | Xfinity |
| 80236 | Harvey Park, Fort Logan, Bear Valley | 72% | 99% | 8 Gig | 2 Gig | 72 | 81 | Xfinity |
| 80202 | LoDo (Lower Downtown), Union Station, Central Business District, Ballpark | 26% | 95% | 8 Gig | 2 Gig | 26 | 77 | Xfinity |
| 80231 | Hampden, Cherry Creek Vista, Windsor | 27% | 100% | 8 Gig | 2 Gig | 27 | 81 | Xfinity |
| 80224 | Virginia Village, Goldsmith, Washington Virginia Vale | 68% | 99% | 8 Gig | 2 Gig | 67 | 81 | Xfinity |
| 80218 | Capitol Hill, Cheesman Park, City Park West, Country Club | 71% | 100% | 8 Gig | 2 Gig | 70 | 81 | Xfinity |
| 80230 | Lowry, Lowry Field | 17% | 100% | 8 Gig | 2 Gig | 16 | 81 | Xfinity |
| 80237 | Hampden, Southmoor Park, DTC (Denver Tech Center) | 33% | 100% | 8 Gig | 2 Gig | 33 | 81 | Xfinity |
| 80247 | Windsor, Aurora, Hampden | 20% | 98% | 8 Gig | 2 Gig | 20 | 79 | Xfinity |
| 80235 | Bear Valley, Pinehurst, Fort Logan | 21% | 98% | 8 Gig | 2 Gig | 20 | 80 | Xfinity |
| 80217 | Downtown Denver, Central Denver | 78% | 98% | 2 Gig | 2 Gig | 77 | 80 | Xfinity |
| 80248 | Downtown Denver | 33% | 100% | 2 Gig | 2 Gig | 32 | 81 | Xfinity |
| 80201 | Downtown Denver, Central Business District | 33% | 100% | 2 Gig | 2 Gig | 32 | 81 | 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 Denver 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.
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
- 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
Is Quantum Fiber or Xfinity available at my Denver address?
Xfinity reaches about 98% of Denver overall, while Quantum Fiber reaches about 70%. Coverage can vary block to block, so check both providers using your exact address before deciding.
Which is cheaper in Denver, Quantum Fiber or Xfinity, and what will I actually pay?
Xfinity starts at $40/mo, while Quantum Fiber starts at $50/mo. These are promotional starting rates, so confirm the post-promo rate, equipment fees, and any contract before signing; then compare the final terms for your address.
Which is faster for gaming, work from home, and 4K streaming?
Quantum Fiber’s 8,000/8,000 Mbps tier reaches about 9% of the city, while Xfinity’s 2,000/300 Mbps tier reaches about 78%. Quantum Fiber is faster where it reaches your address, especially for uploads, so check availability first and choose it if the fiber tier is offered.