One scenario that fits well Hydra's ability is to test the strength of Drupal usernames and passwords. So, as an example, if we have a Drupal site at some HTTP web address, we could use lots of methods in order to collect a list with some valid users. After we create the list and also the list of some possible passwords we can try to initiate a Hydra brute force attack. Hydra for example is not suited for finding the vulnerabilities of a host, for this other solutions can be used.
Kali Linux is especially well suited in environments where high security is needed for your custom developed applications. This is well suited for offensive testing your high security in house developed applications. It is also very good for doing penetration testing on in house developed applications and safe guarding them from external attackers. Kali Linux is tough for use as a day to day Linux operating system as this was never intended to be used by beginners and occasional Linux users.
It is not a straightforward tool to use, it needs certain dependencies to be installed so it can function as intended by its creators. This is one of the most important steps that need to be done while configuring the tool as one needs.
Sometimes the tool gives False Positives passwords.
There are some issues in the functionality of the tool itself (like some bugs, for example affecting the running and hanging process after a number of tries), but most of them have a solution and there is big community support for the tool.
There are many other tools similar to Hydra, one of them being "John the Ripper ". Notable differences are that while John the Ripper works offline, Hydra works online; also Hydra is more popular and with a wider usage as it supports Windows, Linux, and macOSX. An important thing is that both software are free to use, making both very useful tools. We can note that JTR has also a "pro" version that is not free to use and it is more optimized for speed and performance and focused on a specific operating system, while Hydra is free and offers all features at no cost.
I would say the number one competitor to Kali is Parrot OS. While they both do the same/similar things, both have over 600 pre-loaded tools. Parrot does use some more offer what may be considered a more intuitive user interface. Parrot OS has been around for longer than people think and still has active development a support. But Kali is used more broadly in Training sessions, demos and is considered to be form all the articles I have read, the gold standard for penetration testing and tool sets
Our business objectives are accomplished using the tool as Hydra covers our needs for a free password cracking tool.
The tool is a free one that has a lot of advantages because it is a powerful one to use for the specific task of performing some activities that are related to penetration testing.
The services that our business provides for several clients in the field of penetration testing are at the level our customers are expecting.
Initial stages of figuring out back doors in an application hence making them secure.
ROI is good as it reduces in production security threats by letting us know well in advance.
Entire development team along with its designers get a huge sigh of relief as all security holes are sealed well in advance before going into production.