Constructor has a sophisticated built-in automated importer to pull in data from other tools. To import data into Constructor, click your avatar in the upper right corner and visit Settings, then visit the Admin Settings | Import Data section.
You'll be redirected to Trello and asked to grant Constructor temporary read access to your Trello account. If you approve, you'll be redirected back to Constructor where you can select which Trello board to import.
To import multiple Trello boards, import each board one at a time by clicking the Import from Trello button.
The import includes Trello card titles, descriptions, members, labels, checklists, images, attachments, and comments.
The import includes Jira issue titles, descriptions, assignees, watchers, labels, attachments, and comments.
We're actively working on building automated importers for other tools. If you're interested in importing data, contact us. We'd be happy to work with you to get your data into Constructor (no charge).