# Fourier

> Fourier is a Palo Alto-based clean-energy company building modular, fully automated electrolyzers that produce green hydrogen on-site and on-demand. By borrowing architecture from the data center industry - racks of small, software-managed electrolyzer 'blades' running on reprogrammed mass-produced power supplies - Fourier aims to eliminate the costly, hazardous transportation and storage that inflate hydrogen prices, making clean hydrogen practical for heavy industry, transportation fuel, and distributed energy storage.

- **Founded:** 2022
- **Headquarters:** Palo Alto, California, United States
- **Founders:** Siva Yellamraju (Co-Founder & CEO), Ali-Amir Aldan (Co-Founder & CTO)
- **Team size:** ~45 employees
- **Products:** On-Site, On-Demand Hydrogen Production System, Electrolyzer 'Blades', Software-Defined Management Layer, Reprogrammed Data-Center Power Supplies
- **Notable:** Raised $18.5M Series A in April 2025 led by General Catalyst and Paramark Ventures, with Airbus Ventures participating., Completed two lab-scale pilots (a pharmaceutical manufacturer and a solar energy company) producing ~1 kg hydrogen/hour., Engineered electrolyzers using reprogrammed, mass-produced data-center power supplies to cut costs.

## Products & services

- **On-Site, On-Demand Hydrogen Production System** — A modular, fully automated electrolyzer roughly the size of two standard server racks placed side by side. It generates hydrogen where and when it is needed, removing the cost and danger of transport and storage.
- **Electrolyzer 'Blades'** — Each system contains around 20 small electrolyzer units called blades, an architecture borrowed from data centers that allows production to scale and self-balance across varying loads.
- **Software-Defined Management Layer** — Software monitors and optimizes the performance of each blade in real time - conceptually similar to a Tesla battery management system - using advanced algorithms and AI to maximize efficiency and safety.
- **Reprogrammed Data-Center Power Supplies** — Fourier retrofits mass-produced power supplies from the data center industry to run electrolysis, leveraging components already sold in the billions to drive down cost.

## Achievements

- Raised $18.5M Series A in April 2025 led by General Catalyst and Paramark Ventures, with Airbus Ventures participating.
- Completed two lab-scale pilots (a pharmaceutical manufacturer and a solar energy company) producing ~1 kg hydrogen/hour.
- Engineered electrolyzers using reprogrammed, mass-produced data-center power supplies to cut costs.
- Targets clean hydrogen at ~$6-7/kg, roughly half the prevailing $13-14/kg market price.

## Latest updates

- **2025-04** — Announced $18.5M Series A led by General Catalyst and Paramark Ventures, with Airbus Ventures, Borusan Ventures, GSBackers, MCJ Collective and Positive Ventures participating.
- **2025-06** — Targeted launch of two commercial-scale pilots: one at an Ohio petrochemical plant and one at a Fremont airline parts manufacturer.

## Links

- Website: https://fourier.earth
- LinkedIn: https://www.linkedin.com/company/fourier-earth

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Profile page: https://yespress.io/fourier
Published by YesPress — https://yespress.io
Last updated: 2026-06-15