If you have access to AT&T Fiber, it is the superior choice over Xfinity. AT&T Fiber provides symmetrical upload and download speeds (up to 5 Gbps) and unlimited data, making it the ultimate option for working from home and heavy streaming. However, if your address only has access to AT&T's older DSL network, Xfinity is the clear winner, offering much faster multi-gigabit cable speeds.
AT&T vs. Xfinity at a Glance (2026)
| Feature | AT&T Fiber | Xfinity (Cable) | Winner |
|---|---|---|---|
| Connection Type | 100% Fiber-Optic | Coaxial Cable | AT&T |
| Max Download Speed | Up to 5,000 Mbps | Up to 2,000 Mbps | AT&T |
| Max Upload Speed | Up to 5,000 Mbps | Up to 200 Mbps | AT&T (Huge Advantage) |
| Data Caps | None | 1.2 TB (in most regions) | AT&T |
| Contracts | No Contracts | 1-Year or 2-Year Options | AT&T |
Who Wins in Speed & Performance? (AT&T)
Because AT&T Fiber uses 100% glass fiber-optic lines, their upload speeds are identical to their download speeds. Xfinity’s aging cable infrastructure severely limits upload speeds, which can cause lag during Zoom calls or competitive gaming. Furthermore, AT&T never imposes data caps, whereas Xfinity limits most customers to 1.2 TB per month (unless you pay an extra fee for unlimited data).
Who Wins in Pricing & Bundles? (Xfinity)
Xfinity offers some of the cheapest entry-level internet plans on the market (often starting around $25/mo). They also offer incredible bundle discounts if you combine your internet with Xfinity Mobile or X1 TV service.
Break Free from Xfinity Data Caps!
Tired of watching your data usage every month? AT&T wants to buy you out of your current Xfinity contract. You can get up to a $500 Switcher Credit to cover your early termination fees when you upgrade to AT&T Fiber.
Call our comparison experts at (844) 817-0136 to see if AT&T Fiber has reached your street yet!