These startups are out to replace the Wall Street establishment

Some startups are out to find their place on Wall Street alongside the traditional players. And some are out to replace the establishment altogether.

Big banks have long depended on antiquated and personnel-heavy businesses to do everything from marketing bond deals to striking currency transfers.

Some nimble start-ups have sought to partner with Wall Street firms and make these processes more efficient. Others have sought to step in to the gaps left behind by traditional players as a result of regulation.

And then there is a group of startups founded in the U.S. and elsewhere that are out to disrupt them altogether. Some are off to a great start.

Business Insider spoke with dealmakers, venture capitalists and entrepreneurs to put together a list of the companies most likely to up-end Wall Street's traditional hierarchy.

When some of these companies come to "occupy" lower Manhattan, they might not ever leave.