Asking a different question than this old thread about integration.
Slack-to-Trello is great. You can create a card on the board and lane of your choice without opening Trello.
But Trello-to-Slack lacks the one feature we hoped for (or at least I can't find it): we wanted faster way to notify a coworker of a new individual comment on a card.
That's the ability to use Slack in a comment rather than "@coworker" email notification.
Right now, Trello just sends the whole card--not the link — and with clutter.
I explored the Remind selection in the Slack Powerup . A reminder in 3 min to someone might work. It won't accept "now" which might be a great solution if it could be added.