Ever wish you could call up a Startup expert or a growth hacker, like a 900 number back in the 90s and spend $X a minute getting their advice or feedback on your project?

Clarity makes it possible with this ‘Dial-A-Mentor’ service, having some 20,000 experts on tap. Rates go from $2.50 a minute for someone you’ve never heard of, to $166 a minute for Mark Cuban.