What task tracker with roles would you recommend?

Question

Project management

Please advise a task tracker
- a configurable workflow of tasks (several stages, not all of them can go to all stages)
- rigid roles (only a certain role can move the workflow from certain stages)
- api with the ability to move tasks along the workflow and upload reports
- it is desirable to have the ability to start several projects with different workflows
- preferably boxed
- preferably free or not very expensive for small teams (jira - bust)

Answer 1

Trello + Trello Apps

Answer 2

According to the indicated priorities, I can definitely advise Pyrus workflow :
1. Very convenient task and subtask routing with access rights differentiation.
2. Roles with the ability to disable routing editing depending on the type of user (manager-employee).
3. Yes.
4. You can create workflows as much as you like. Accesses and roles can also be flexibly configured.
5. Saas (web version and mobile apps for iOS, Android, Windows Phone).
6. Free for 2 users and very affordable for more (from 9 rubles per day). At the same time, upon registration, a bonus of 1000 rubles is awarded for a full test.
And most importantly - even without being an IT specialist or administrator, it is easy to set up all processes on your own through visual editors in the system.

Answer 3

https://www.pivotaltracker.com/