Scott Kirsner writes: ‘Graduation season for New England college students doesn’t roll around until May. But for New England entrepreneurs, it seems to arrive in November. This month, a trio of so-called accelerator programs — designed to help entrepreneurs transform concepts into companies — held their equivalent of diploma ceremonies, typically dubbed “Demo Days.” After attending, meeting with companies, and talking to investors, here’s my take on the 1o coolest companies to come out of TechStars Boston, Healthbox Boston, and Betaspring based in Providence.’
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