Is AT&T or Xfinity (Comcast) faster?

Based on 2,011 verified speed tests, Xfinity (Comcast) is faster overall. AT&T averages 289 Mbps download, Xfinity (Comcast) averages 347 Mbps download.

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

The average download speed difference is 58 Mbps. Upload speed difference is 84 Mbps. Ping difference is 6 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 2,011 verified measurements.

Overall Winner: Xfinity (Comcast)

AT&T

Download

289 Mbps

Upload Wins

164 Mbps

Ping

39 ms

Based on 761 measurements · Full AT&T stats →

Xfinity (Comcast)

WINNER

Download Wins

347 Mbps

Upload

80 Mbps

Ping Wins

33 ms

Based on 1,250 measurements · Full Xfinity (Comcast) stats →

Speed Difference Summary

Download difference

58 Mbps

Xfinity (Comcast) is faster

Upload difference

84 Mbps

AT&T is faster

Ping difference

6 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 289 Mbps (761 tests)

Xfinity (Comcast) 347 Mbps (1250 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 2,011 verified speed tests from AT&T and Xfinity (Comcast) customers, Xfinity (Comcast) delivers faster average speeds.

AT&T averages 289 Mbps download with 164 Mbps upload and 39 ms ping. Xfinity (Comcast) averages 347 Mbps download with 80 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