REDstack

Private

HeerenveenEnergy & Sustainabilityhttps://www.redstack.nl/

Last Round

VC Round

Jan 28, 2025

Total Funding Raised

$5.3M

Momentum

Top 25%

of companies Caplight tracks

Company Overview

REDstack is a clean energy company that develops and commercializes Reverse Electro-Dialysis (RED) technology to generate sustainable energy from salinity gradients.

Sector

Energy & Sustainability

Verticals

Renewable Energy, Water Treatment, Carbon Capture, Circular Economy

Business Model

B2B

Customer Profile

Hardware Sales, Services & Consulting, Government Contracts

AI Layer

Non-AI

Keywords

electromembrane stacksBlue Energyreverse electrodialysisREDsalinity gradient energywater desalinationresource recoverycarbon captureosmotic powerion-selective membranesbaseload powerelectrodialysismembrane technologywater treatmentlithium recoverydirect air capturedirect ocean capture

Historical Pricing

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Caplight Momentum Score

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REDstack Comparables

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REDstack comparables — related companies by embedding similarity
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REDstack Funding Rounds

Historical fundraising activity

Data table
Round	Date	Amount Raised	Valuation	Investors	Sources
VC Round	Jan 28, 2025
Grant	Mar 28, 2023

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Key People

Founding team and executive leadership

Paula Gonzalez

Chief Executive Officer

Executive Team

Simon Grasman

Chief Technology Officer

Executive Team

Ruben Dijkhuis

Chief Operating Officer

Executive Team

REDstack Investors

Notable investors and investment history

REDstack investors
Investor	Rounds
PureTerra Ventures	VC Round
Waddenfonds	Grant

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Market signals

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May 15, 2026
Monthly visitors grew 58% MoM.
Jan 8, 2026
Monthly visitors increased 35% MoM.

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REDstack Filings

SEC and related filings with document metadata.

Data table
Typed	Date	Amount Offered	Amount Sold	Filling	Pages	Download
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REDstack Filings

SEC and related filings with document metadata.

Frequently Asked Questions

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Firmographic Details

HeadquartersHeerenveen

Employee Range22

Year Founded2005

Last FundingJan 28, 2025

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