Optimum vs Xfinity (Comcast)
Full speed comparison based on 1,971 verified measurements.
Optimum
WINNER384 Mbps
76 Mbps
35 ms
Xfinity (Comcast)
361 Mbps
75 Mbps
33 ms
Speed Difference Summary
Download difference
23 Mbps
Optimum is faster
Upload difference
1 Mbps
Optimum is faster
Ping difference
2 ms
Xfinity (Comcast) has lower latency
By Country
Head-to-head comparison where both ISPs have user data.
Test your own speed
See if your connection matches the Optimum or Xfinity (Comcast) average.
How Optimum Compares to Xfinity (Comcast)
Based on 1,971 verified speed tests from Optimum and Xfinity (Comcast) customers, Optimum delivers faster average speeds.
Optimum averages 384 Mbps download with 76 Mbps upload and 35 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.