Which helpdesk open source would you recommend based on my TOR?

Question

linux

Welcome all!
It is necessary to raise a server to receive applications and distribute them among employees in automatic modes (by tags or templates, etc.). After going to Google, I realized that maybe helpdesk would suit me, but looking at the demos I didn’t find a suitable one, so I’m turning to more experienced ones.
TK:
1. Web-muzzle;
2. Ability to create an application template with editable fields to fill;
3. Hierarchical structure of users (i.e., for example, an administrator is created who only sees certain users);
4. Ability to customize the fields in the user profile;
5. Uploading the finished (filled) application to Excel;
6. Ability to install on a Linux server (Debian 10).

This is probably the most basic, the rest seems to be in most of these helpdes already. Thank you very much for the help!

Answer 1

Free or for cash?
Free:
OTRS
Redmine
Mantis
Bugzilla
For money
JIRA
ManageEngine
JIRA is the best product I've seen, but the price doesn't just bite - it's as feisty as a mad dog if you need more than 10 users

Answer 2

All of these tasks can be solved by free GLPI. And she will help you in inventorying equipment and maintaining technical documentation.

Answer 3

I recommend to study:
zammad.org - IMHO, the most efficient, but the main disadvantage is that there is no mobile version out of the box.
trudesk - from the minuses, I remember that notifications about a new ticket come to all agents at once, this could not be removed
helpy.io
uvdesk