Startups typically describe their growth with exponential, not arithmetic, rates. Last year Wealthfront and Betterment's AUM grew by over 10% a month, growth has since fallen to less than 5%. What are these two robos going to do? Growth rates are declining, costs are sky rocketing, revenues are underwhelming, incumbents are fighting back, and investors are questioning. I'd look for both of these companies to seek an early exit at an average valuation or change their business model.