Optimum vs Xfinity (Comcast)
Full speed comparison based on 1,738 verified measurements.
Optimum
WINNER387 Mbps
81 Mbps
36 ms
Xfinity (Comcast)
355 Mbps
79 Mbps
33 ms
Speed Difference Summary
Download difference
32 Mbps
Optimum is faster
Upload difference
2 Mbps
Optimum is faster
Ping difference
3 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 1,738 verified speed tests from Optimum and Xfinity (Comcast) customers, Optimum delivers faster average speeds.
Optimum averages 387 Mbps download with 81 Mbps upload and 36 ms ping. Xfinity (Comcast) averages 355 Mbps download with 79 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.