Sadly this is more often than not the destiny of service and software you can't host/run yourself. At least this is not google or the like buying something to can it. Though it would not be surprising if trello got merged or integrated in some way in jira.
Luckily there are free software alternatives to trello you can self host that are not going to sell out such as wekan[1], taskboard[2], taiga[3], kanboard[4], ...
Luckily there are free software alternatives to trello you can self host that are not going to sell out such as wekan[1], taskboard[2], taiga[3], kanboard[4], ...
[1]: https://wekan.io/
[2]: https://taskboard.matthewross.me/
[3]: http://taiga.pm/
[4]: https://kanboard.net/