E Source

E Source is a Boulder-based research, consulting and data science firm focused on utilities. It combines subscription research and advisory with data science and AI analytics and consulting-led implementation, in areas such as customer experience, grid and asset optimization, and program innovation. Customers are electric, gas and water utilities and their partners. Align Capital Partners acquired the company in 2019, and it later bought UMS Group and ILLUME. PitchBook lists about 435 employees (2026).