Is AT&T or Xfinity (Comcast) faster?

Based on 3,025 verified speed tests, Xfinity (Comcast) is faster overall. AT&T averages 290 Mbps download, Xfinity (Comcast) averages 361 Mbps download.

What is the average speed difference between AT&T and Xfinity (Comcast)?

The average download speed difference is 71 Mbps. Upload speed difference is 65 Mbps. Ping difference is 9 ms.

Should I choose AT&T or Xfinity (Comcast)?

It depends on your use case. Xfinity (Comcast) offers faster average speeds, but actual performance varies by location and plan. Test your current connection and compare to both averages before switching.

AT&T vs Xfinity (Comcast)

Full speed comparison based on 3,025 verified measurements.

Overall Winner: Xfinity (Comcast)

AT&T

Download

290 Mbps

Upload Wins

140 Mbps

Ping

42 ms

Based on 1,259 measurements · Full AT&T stats →

Xfinity (Comcast)

WINNER

Download Wins

361 Mbps

Upload

75 Mbps

Ping Wins

33 ms

Based on 1,766 measurements · Full Xfinity (Comcast) stats →

Speed Difference Summary

Download difference

71 Mbps

Xfinity (Comcast) is faster

Upload difference

65 Mbps

AT&T is faster

Ping difference

9 ms

Xfinity (Comcast) has lower latency

By Country

Head-to-head comparison where both ISPs have user data.

United States Xfinity (Comcast) wins

AT&T 292 Mbps (1251 tests)

Xfinity (Comcast) 361 Mbps (1766 tests)

Test your own speed

See if your connection matches the AT&T or Xfinity (Comcast) average.

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How AT&T Compares to Xfinity (Comcast)

Based on 3,025 verified speed tests from AT&T and Xfinity (Comcast) customers, Xfinity (Comcast) delivers faster average speeds.

AT&T averages 290 Mbps download with 140 Mbps upload and 42 ms ping. Xfinity (Comcast) averages 361 Mbps download with 75 Mbps upload and 33 ms ping.

Averages tell only part of the story — actual speeds vary by your specific plan, location, time of day, and whether you use Ethernet or Wi-Fi. Run a speed test on your current connection to see how it compares to both averages before making a switching decision.

AT&T speed Xfinity (Comcast) speed All ISPs Country speeds