Netalyzr is described as 'free tool that analyzes your network for possible problems large and small helping you determine your overall network health. When the tests are complete, youll see an exhaustive rundown of all the results' and is an website. There are 1 alternatives to Netalyzr, not only websites but also apps for BSD, Linux and Mac. The best alternative is Flent, which is both free and Open Source.
Netalyzr alternatives are mainly Network Analyzers but may also be Benchmark Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Netalyzr.