Is AT&T or Xfinity (Comcast) faster?

Based on 1,390 verified speed tests, Xfinity (Comcast) is faster overall. AT&T averages 290 Mbps download, Xfinity (Comcast) averages 353 Mbps download.

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

The average download speed difference is 63 Mbps. Upload speed difference is 86 Mbps. Ping difference is 8 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 1,390 verified measurements.

Overall Winner: Xfinity (Comcast)

AT&T

Download

290 Mbps

Upload Wins

174 Mbps

Ping

40 ms

Based on 489 measurements · Full AT&T stats →

Xfinity (Comcast)

WINNER

Download Wins

353 Mbps

Upload

88 Mbps

Ping Wins

32 ms

Based on 901 measurements · Full Xfinity (Comcast) stats →

Speed Difference Summary

Download difference

63 Mbps

Xfinity (Comcast) is faster

Upload difference

86 Mbps

AT&T is faster

Ping difference

8 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 290 Mbps (489 tests)

Xfinity (Comcast) 353 Mbps (901 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 1,390 verified speed tests from AT&T and Xfinity (Comcast) customers, Xfinity (Comcast) delivers faster average speeds.

AT&T averages 290 Mbps download with 174 Mbps upload and 40 ms ping. Xfinity (Comcast) averages 353 Mbps download with 88 Mbps upload and 32 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