Halcyon, a San Francisco, CA–based AI platform for energy, has raised $21 million in Series A funding. 

Investors 

The round was led by Energize Capital, with participation from Zero Infinity Partners, Congruent Ventures, Obvious Ventures, and Sabanci Climate Ventures, among others. 

Energize Capital is a Chicago-based investment firm managing over $1.8 billion in assets, with a specific focus on the digital side of the energy transition. Founded in 2016, the firm specializes in asset-light climate tech, investing in software and data platforms required to manage a decarbonized economy. Through its Ventures and Endurance funds, the firm supports companies from early growth stages through maturity. 

Halcyon Use of Funds 

The company will use the funding to expand its software capabilities, strengthen its proprietary energy data infrastructure, and scale its platform. 

About Halcyon 

Halcyon provides an AI-powered platform designed to improve productivity, streamline workflows, and accelerate business growth for energy professionals. It allows users to search thousands of regulatory filings and energy datasets using natural language. Headquartered in San Francisco, California, Halcyon also offers structured data subscriptions that monitor areas such as large-load tariffs, power plant development, battery energy storage systems, and substation projects. Incorporated in 2023, Halcyon's mission is to become the system of action for the global energy industry. 

Funding Details 

Company: Halcyon Carbon, Inc. 

Raised: $21.0M 

Round: Series A 

Funding Date: March 2026 

Lead Investor: Energize Capital 

Additional Investors: Zero Infinity Partners, Congruent Ventures, Obvious Ventures, Sabanci Climate Ventures, and others 

Company Website: https://halcyon.io/  

Software Category: Energy AI / Energy Intelligence Software 

Source: https://www.businesswire.com/news/home/20260316032633/en/