AT&T Fiber vs Xfinity
AT&T Fiber ranks higher on our formula, 81 to 67 on each provider's best plan. It is also cheaper over two years (from $50/mo all-in) and sells the faster top plan (5 Gbps).
Prices last checked September 2026.
Side by side
AT&T Fiber and Xfinity compared
Real cost is the two-year monthly average with the promo step-up, equipment rental and installation folded in.
| Measure | AT&T Fiber | Xfinity |
|---|---|---|
| Technology | Fiber | Cable, Fiber |
| Fastest plan | 5 Gbps | 2 Gbps |
| Upload on fastest plan | 5 Gbps | 300 Mbps |
| Lowest advertised price | $50/mo | $30/mo |
| Lowest real cost | $50/mo | $60/mo |
| Price steps up after promo | No | On some plans |
| Data caps | None | On some plans |
| Contracts | None required | None required |
| Equipment fee | Included | Up to $15/mo |
| States served | 22 | 40 |
| Our rating (best plan) | 81/100 | 67/100 |
Plans
Every plan from both
AT&T Fiber
FiberChecked Sep 11, 2026- Fiber 300300 Mbps · $50/mo · real $50
- Fiber 500500 Mbps · $65/mo · real $65
- Fiber 1 Gig1 Gbps · $80/mo · real $80
- Fiber 5 Gig5 Gbps · $95/mo · real $95
Xfinity
CableFiberOut of date — checked Sep 11, 2026- Connect150 Mbps · $30/mo · real $60
- Fast500 Mbps · $55/mo · real $85
- Superfast800 Mbps · $65/mo · real $80
- Gigabit1.1 Gbps · $75/mo · real $90
- Gigabit X22 Gbps · $95/mo · real $95
Honest assessment
Where each one wins
AT&T Fiber
- Symmetrical upload and download
- No annual contract, no data cap
- Price does not jump after year one
- Only built in parts of 21 states
- Install windows can be far out
- Multi-gig limited to newer builds
Xfinity
- Available in 40 states
- Multi-gig tiers in most markets
- No contract on most plans
- Price rises after 12–24 months
- Slow upload on non-fiber tiers
- 1.2 TB data cap in many regions
Head to head
Cities where AT&T Fiber and Xfinity compete
Markets where we have both on record. Each page ranks every provider there.
Questions
AT&T Fiber vs Xfinity, answered
Is AT&T Fiber or Xfinity better?
AT&T Fiber ranks higher on our formula, 81 to 67 on each provider's best plan. It is also cheaper over two years (from $50/mo all-in) and sells the faster top plan (5 Gbps).
Which is cheaper, AT&T Fiber or Xfinity?
AT&T Fiber has the lower real cost: $50 a month averaged over two years with fees included, against $60 for Xfinity. The advertised entry prices are $50 for AT&T Fiber and $30 for Xfinity.
Which is faster, AT&T Fiber or Xfinity?
AT&T Fiber sells the faster top plan, at 5 Gbps down and 5 Gbps up. Xfinity tops out at 2 Gbps down and 300 Mbps up. For most households upload speed matters more than the headline download figure.
Where can I get both AT&T Fiber and Xfinity?
We have both on record in 37 markets, including San Jose, CA; San Francisco, CA; Oakland, CA; Fremont, CA; Sacramento, CA. Availability still varies street by street.
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