- Instead of shareholders, nonprofits have members. Members don't own the corporation (no one does) but control it insofar that they hire-and-fire its directors.
- Memberships normally can't be sold, and nonprofits have no equivalent to dividends.
- There are stronger conflict-of-interest protections, preventing officers from signing cheques to themselves or otherwise using the corporation's resources for their personal benefit - at least without someone else's approval.
A typical setup for nonprofits is to tie memberships to being a director, so that current board members choose their own successors. This is known as a "self-perpetuating board".