Techstars is a mentorship-driven startup accelerator founded by David Cohen, Brad Feld, David Brown, and Jared Polis that holds 13 week programs for startups in Boulder, New York City, Boston, Seattle, San Antonio, Austin, Chicago and London. It is considered one of the best startup accelerators in the world. Fewer than 1% of the companies that apply to Techstars are accepted.As of mid-2015, Techstars has accepted 526 companies into its program.