FlexGen

FlexGen designs and operates the battery storage energy management software platform enabling today's energy transition - HybridOS

Latest funding

$100M Series B+ · August 24, 2022

Total raised: $250M across 2 sourced rounds

Website: flexgen.com.

X: @flexgenpower · 696 followers.

LinkedIn: linkedin.com.

Categories: AI infrastructure and compute Robotics and hardware Climate and energy.

Sectors: Battery, Energy, Energy Storage, Renewable Energy, Semiconductor.

Stage: Series B+.

Based in: Durham, United States.

Founded: 2009.

Total raised: $250M in 2 sourced rounds.

Last round: Aug 24, 2022 · 1,541 days ago.

Headcount: 251–500 employees.

On Recent Funding since: Nov 8, 2026.

Signals

X account@flexgenpower · created Mar 7, 2013 (13 years old) · 696 followers

Website registeredNov 6, 2010 (16 years old)

TIMELINE · MONEY RAISED

@flexgenpower·Raised $250M in 2 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

August 24, 2022
Series B+ · $100M
VVitol (lead)
Source: startupintros.com
August 25, 2021
Series B+ · $150M
AApollo (lead), AAltira Group
Source: wraltechwire.com
March 7, 2013
X account created
November 6, 2010
Website created

Acquired company	Price	Announced
CClean Energy Services	Not disclosed	Apr 2, 2026 · Business Wire
PPowin Energy	Not disclosed publicly	Aug 6, 2025

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/flexgen (get a free API key).