The Ookla Internet speed test is considered to be a reliable and accurate tool for measuring internet speed. Ookla uses a client and server testing engine that dynamically scales the number of connections to the server to accurately measure client-side connections up to 10 Gbps.
The speed test provides an accurate, consistent experience on all devices and captures a snapshot of the internet for that specific time, place, device, and network. Ookla also has a vast network of over 8,000 global servers, which allows it to measure the full extent of a network’s performance.
However, there are some claims by users that the Ookla broadband speed test results are not accurate and do not reflect their actual internet speeds. It’s important to note that there are several factors that can affect the accuracy of a speed test, such as network congestion, server selection, and the quality of the connection between the device and the router.
It’s also essential to ensure that no other applications or devices are using the internet during the test to obtain the most accurate results
Further Reading: https://www.howtogeek.com/426757/how-do-internet-speed-tests-work-and-how-accurate-are-they/