Space defense

Radical

Website

Radical’s StratoSats are autonomous platforms that provide satellite-like services on demand. They fly within Earth’s atmosphere to provide persistent, high performance infrastructure across applications in earth observation, connectivity, and more. Unlike satellites, StratoSats navigate freely without the need for rocket launches or orbits - reduc

Founded 2022Origin source ↗Checked 2026-09-15

Overview

Radical’s StratoSats are autonomous platforms that provide satellite-like services on demand. They fly within Earth’s atmosphere to provide persistent, high performance infrastructure across applications in earth observation, connectivity, and more. Unlike satellites, StratoSats navigate freely without the need for rocket launches or orbits - reducing costs, increasing flexibility, and ensuring customers get the targeted coverage they need.

Company description As recorded 2026-11-08

Founders & team

Previously Radical Inc.

Company history As recorded 2026-11-08

James Thomas

Founder

Co-Founder & CEO at Radical (W23) - Radical makes high altitude solar-powered aircraft. Our aircraft are able to fly continuously in the stratosphere without landing. They provide an inexpensive, zero-emissions way to connect and observe earth like never before. Prior to this I worked at Amazon Prime Air for six years (doing aerodynamics and aircraft design for delivery drones).

Founder profile As recorded 2026-09-15

Cyriel Notteboom

Founder

Co-Founder & CTO at Radical (W23) - Radical makes high altitude solar-powered aircraft. Our aircraft are able to fly continuously in the stratosphere without landing. They provide an inexpensive, zero-emissions way to connect and observe earth like never before. Prior to this I worked at Amazon Prime Air for six years (mechanical design, structural analysis and optimization of delivery drones).

Founder profile As recorded 2026-09-15
6team members reported
Source-reported As recorded 2026-09-15

Founded 2022 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthverified profile
Website observationwebsite unreachable
Last website check2026-11-11
Location · source statedSeattle, WA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The latest website check does not confirm this company’s website.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationdescriptive evidenceclassified market and modelsourced peoplesourced founding year