Hydrostor is a developer of Advanced Compressed Air Energy Storage (A-CAES), a long-duration, emission-free, cost-effective energy storage. Founded by Cameron Lewis and Curtis VanWalleghem in 2010, Hydrostor is backed by investors that include ArcTern Ventures, Canoe Financial, Elemental Energy, MaRS Catalyst Fund, and Meridiam and is headquartered in Toronto.