I have 2 boards - one project based with members and on that is 'private' todo lists with only me as admin / member. Can I invite a member from the other board to be able to view / interact with a specific card on my personal board without them viewing all my other cards? (At the moment I cannot see any invitees in the add member box within the card)

  • Not what you asked for, but Astrid.com is a todo list tool that does allow you to share individual tasks or entire lists with other users without revealing your private tasks.
    – dsh
    Aug 1, 2012 at 17:56
  • This question is not exactly what you asked, but has some solutions (for viewing only, not interacting).
    – fiatjaf
    Mar 23, 2015 at 1:57

3 Answers 3


I have just recently tried to do this myself. It does not seem possible. What I did instead (not a complete workaround) was to create a new board in an organization that is visible to the organization members. They can view, vote, and comment, but nothing more.


That would not be possible. Usually by my understanding, at this moment, Trello does not allow you to specify permissions on cards. You can only add members to a card after adding them to the board.

  • OK, thanks. But once added to a board you can then add members again to individual cards. I am not sure what purpose this serves ... hence my question above.
    – Robin
    Jul 31, 2012 at 17:41
  • That would be similar to task delegation. Something like saying: "The task of finishing up on this card is handed over to the following people..." Aug 1, 2012 at 18:30

Yep, I've built another board and added the people I want to have access to those cards onto it, then created a Butler rule to mirror cards across boards when I add a label such as Shared, where it creates a two-way link between the cards.

However, I haven't figured out a way to make the changes two way. meaning If a comment is made on the shared board, it also gets reflected on the personal one.

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