Hello @Anonymous , Welcome to the Microsoft Q&A forum.
I think Azure Internet Analyzer might satisfy your requirements. Internet Analyzer uses a small JavaScript client embedded in your Web application to measure the latency from your end users to your selected set of network destinations. You can find additional details here in the documentation.
Alternatively, you can also use PSping to test the latency and bandwidth measurement.
Please let me know if you have any additional questions here. Thank you!