CenturyLink vs Xfinity (Comcast)
Full speed comparison based on 1,571 verified measurements.
CenturyLink
243 Mbps
153 Mbps
48 ms
Xfinity (Comcast)
WINNER351 Mbps
83 Mbps
32 ms
Speed Difference Summary
Download difference
108 Mbps
Xfinity (Comcast) is faster
Upload difference
70 Mbps
CenturyLink is faster
Ping difference
16 ms
Xfinity (Comcast) has lower latency
By Country
Head-to-head comparison where both ISPs have user data.
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See if your connection matches the CenturyLink or Xfinity (Comcast) average.
How CenturyLink Compares to Xfinity (Comcast)
Based on 1,571 verified speed tests from CenturyLink and Xfinity (Comcast) customers, Xfinity (Comcast) delivers faster average speeds.
CenturyLink averages 243 Mbps download with 153 Mbps upload and 48 ms ping. Xfinity (Comcast) averages 351 Mbps download with 83 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.