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Radical

Radical

Private
Seattle, WashingtonFrontier & Industrial Techhttps://radicalaero.com

Last Round

Seed

Apr 24, 2024

Est. Valuation

$1.79M

Total Funding Raised

$5M

Momentum

Top 10%

of companies Caplight tracks

Company Overview

Radical is an aerospace company that develops autonomous, solar-powered aircraft designed for continuous, long-duration flight in the stratosphere to provide telecommunications, earth observation, and climate sensing services.

Sector

Frontier & Industrial Tech

Verticals

Aviation & Drones, Drones & UAVs, Space Technology, Defense Tech

Business Model

B2G

Customer Profile

Data as a Service, Services & Consulting

AI Layer

Application

Keywords

unmanned aerial systemsUASsolar-powered aircrafthigh-altitude pseudo-satelliteHAPSaerodynamic controlflight control solutionsstratospheric droneautonomous flightedge computingISRintelligence, surveillance, and reconnaissancepersistent surveillancedata as a serviceDaaSdefense tech

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Caplight Momentum Score

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Radical Comparables

Compare Radical with similar companies based on industry and business-model similarity.

Radical comparables — related companies by embedding similarity
CompanySimilarityMarket Cap
Swift Engineering, Inc.
78%
Kea Aerospace
78%
Landing Zones Canada Inc.
77%

Radical Funding Rounds

Historical fundraising activity

Data table
RoundDateAmount RaisedValuationInvestorsSources
SeedApr 24, 2024
AcceleratorJan 4, 2023

Key People

Founding team and executive leadership

Cyriel Notteboom

Co-Founder & CTO

Founding Team

James Thomas

Co-Founder & CEO

Founding Team

Radical Investors

Notable investors and investment history

Radical investors
InvestorRounds
Scout VenturesSeed
InflectionSeed
Y CombinatorAccelerator, Seed

Market signals

Structured signals derived from secondary market and firmographic data.

  • Jul 27, 2026

    Open roles increased to 17, 131% of headcount.

  • Oct 1, 2025

    Subscale solar aircraft completed a non-stop flight over 24 hours.

Radical Filings

SEC and related filings with document metadata.

Data table
TypedDateAmount OfferedAmount SoldFillingPagesDownload
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Radical Filings

SEC and related filings with document metadata.

Frequently Asked Questions

Common questions about Radical's valuation, stock price, and market status.

Firmographic Details

HeadquartersSeattle, Washington
Employee Range8
Year Founded2022
Last FundingApr 24, 2024

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