We compared Fast ★★☆☆☆ with M-Lab ★★★★★ and concluded that M-Lab is a better speed test than Fast.
This is mainly because M-Lab is much more accurate than Fast.
If usability is important to you, it's best to use Fast.
The radar chart above is based on the results of our standardized speed test test. The results speak for themselves.
Strengths of Fast
By far Fast's strongest point is its usability. The speed test starts automatically, and has an interface that clearly shows one thing, namely the measured download speed.
In addition, you can easily pause the test. Furthermore, Fast is ad- and cookie-free.
It is therefore not surprising that Fast scores high on the list Usable speed tests and on the list Privacy respecting speed tests.
Strengths of M-Lab
M-Lab is one of the few speed tests with an accuracy score of 100 (out of 100).
It's good to know that compared to most other speed tests, M-Lab scores quite well and fairly evenly on the different aspects we tested.
M-Lab scores high on the overall score list due to its high accuracy and thoroughness.
Our recommendation
Based on what we know about speed tests, if we had to choose between these two speed tests, we would choose M-Lab over Fast. The deciding factor is the accuracy of M-Lab.