Parabol guides Retrospective and Check-In meetings, syncing tasks to a powerful task board.
If you have a group of people that is trying to acheive some shared progress but you don't really have good visibility of each others work give Parabol a try.
It is great for small teams that want to get into Agile
Very limited customization. If you are used to crazy Jira workflows you will like the ease of parabol but might miss the customization.