Charleston residents have 3 internet providers to choose from. C Spire Fiber is the most popular provider, offering fiber internet service. In our research, we have been seeing 200 Mbps for download speeds and 105 Mbps for upload speeds for C Spire Fiber customers over 17 recent tests. Sparklight and AT&T also have coverage in Charleston, although they are not as popular as C Spire Fiber. These providers offer cable, DSL and fixed wireless internet service.
See more detailed speed and coverage data below.
| Provider | Download Speed | Upload Speed | Latency |
|---|---|---|---|
| C Spire Fiber Fiber | 200 Mbps | 105 Mbps | 40 ms |
| Sparklight Cable | 113 Mbps | 8 Mbps | 22 ms |
| AT&T DSL Fixed Wireless | 86 Mbps | 38 Mbps | 48 ms |
| * Data from speed tests taken in the last 3 months | |||
C Spire Fiber is the most popular provider in Charleston offering fiber internet service. Users have been getting 200 Mbps for download speeds and 105 Mbps for upload speeds over 17 recent tests.
C Spire Fiber has the fastest average download speed, the fastest average upload speed, and the 2nd lowest latency out of all of the providers in Charleston. 38% of users saw download speeds between 100-250 Mbps, and 44% of users saw upload speeds between 100-250 Mbps.
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Sparklight is the 2nd most popular provider in Charleston offering cable internet service. Users have been getting 113 Mbps for download speeds and 8 Mbps for upload speeds over 15 recent tests.
Sparklight has the 2nd fastest average download speed, the 3rd fastest average upload speed, and the lowest latency out of all of the providers in Charleston. 33% of users saw download speeds between 50-100 Mbps, and 38% of users saw upload speeds slower than 5 Mbps.
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| Date | Download Speed | Upload Speed | Latency |
|---|---|---|---|
| February 26, 2024 | 520 Mbps | 36 Mbps | 25 ms |
| February 25, 2024 | 443 Mbps | 8 Mbps | 24 ms |
| February 20, 2024 | 529 Mbps | 21 Mbps | 30 ms |
| February 18, 2024 | 113 Mbps | 18 Mbps | 22 ms |
AT&T is the 3rd most popular provider in Charleston offering DSL and fixed wireless internet service. Users have been getting 86 Mbps for download speeds and 38 Mbps for upload speeds over 3 recent tests.
AT&T has the 3rd fastest average download speed, the 2nd fastest average upload speed, and the 3rd lowest latency out of all of the providers in Charleston. 33% of users saw download speeds between 100-250 Mbps, and 100% of users saw upload speeds between 25-50 Mbps.
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Upload Speeds
| Date | Download Speed | Upload Speed | Latency |
|---|---|---|---|
| March 7, 2024 | 86 Mbps | 38 Mbps | 48 ms |
We’ll run a download test and an upload test to give you the full picture of your internet connection.