Speedtest.net is an online service used to measure the speed of an internet connection. It is free to use and available on desktop, mobile, and tablet devices. The service works by connecting to a remote server and downloading a file of known size. The download and upload speeds are then calculated based on the size of the file and the time taken to download and upload it. The results are then presented in the form of a speed score, which takes into consideration factors such as latency, jitter, and packet loss. Speedtest.net also allows users to compare their results to those of other users in their region. Additionally, the service can be used to test the speed of a particular website or application, and it also provides detailed information about the user's connection, such as IP address, server location, and more.
It is faster than Speedtest.net but does not offer load and ping tests. Good for quick measurements.
Great interface with lots of details. Better than the Ookla speed test.
Testing using a number of dedicated, well-managed servers run by experts
This speedtest is the fastest speedtest I have ever seen.
Fast.com
SpeedOf.Me
Testmy.net
nPerf
DSLReports
Network Speed Test
Speed Test Loggger
OpenSpeedTest
Meteor
Internet Speed at a Glance
Ispeed
Bandwidth Place
DownTester
Mobile Speed Test
XYZ Speed Test
Updown Test
Speed Test
Open Nettest
Well, it tests your DownStream but not your UpStream as Speedtest.net does.