Great question! Spark is the first of it's kind in terms of enabling individual investors to invest directly in energy efficiency projects.

However, we're following in the inspiring footsteps of some incredible companies in the cleantech crowd investment sector, particularly Solar Mosaic (joinmosaic.com) and SunFunder (sunfunder.com)

There are also some great teams working on impact focused energy efficiency investments offered to accredited impact investors, including one of our favorite companies, Bloc Power (blocpower.org)