I started using Clubhouse (https://clubhouse.io) for my personal projects and like it a lot for a light-weight alternative to Jira, yet more powerful than Trello. Not sure how it scales for big teams though.
Clubhouse is the first Jira replacement we’ve tried that the devs actually like using. Doesn’t have the laundry list of features Jira has, but meets our needs (team of 20).