1993
$33M
from 8 investors over 8 rounds
Mainspring limited raised undisclosed on August 29, 2017
Investors: Gates Ventures, ClearSky and Khosla Ventures
Mainspring limited raised $33M on December 1, 1999
Investors: Greylock Partners, Crosslink Capital, Essex Investment Management Company, LLC, HCP Ltd and Sandler Capital Management