Setpoint is the most up-to-date undertaking from Ben Rubenstein, a previous executive of Opcity and Real estate agent.com. A new company that sees by itself as the “Stripe of serious estate,” and which aims to offer the two technology and income for other startups in, for illustration, the Electric power Acquiring sector — came out of stealth method on Tuesday. The company, dubbed Setpoint, is the latest enterprise from Ben Rubenstein, a serial entrepreneur who earlier launched direct-vetting firm Opcity and who served as main income officer of Real estate agent.com. Setpoint aims to “enable proptech firms to supply their clients frictionless homebuying and advertising selections which include contingent-absolutely free…