@zhangxiao 免费版几乎没有任何限制，此博文原文就有提及：

“Money? I thought Trello was free!?”
You can still use Trello for free and enjoy unlimited boards, organizations, cards, and no usage restrictions, with or without Trello Gold. You can invite an unlimited number of people to your boards and organizations for free. You can make any of your boards or organizations public or private, for free. We made Trello for everybody and we want everybody to use it, so we don’t want to put essential features behind a pay wall. That’s why Trello Gold is filled with features that are splashy and cool but non-essential.