Startup
Radical
Updated
Radical builds StratoSats - autonomous solar powered aircraft that fly continuously in the stratosphere without landing.
Systems1
- EvenstarA solar-powered uncrewed aircraft designed for stratospheric observation and communications.
Newest unveiled first. Systems that belong to a government program link to the program page, where variants, costs and contracts are.
Capabilities2
| Technology | Role | Maturity | TRL | Notes | Confidence |
|---|---|---|---|---|---|
| Aircraft and aeronautics | Developer | — | — | classify_sectors run 37, haiku, taxonomy 2026-10-18b: Builds autonomous solar-powered stratospheric aircraft (StratoSats) for connectivity and observation; no defense use is stated. | Reported |
| Uncrewed systems | Developer | — | — | classify_sectors run 37, haiku, taxonomy 2026-10-18b: Builds autonomous solar-powered stratospheric aircraft (StratoSats) for connectivity and observation; no defense use is stated. | Reported |
- Developerclassify_sectors run 37, haiku, taxonomy 2026-10-18b: Builds autonomous solar-powered stratospheric aircraft (StratoSats) for connectivity and observation; no defense use is stated.—Reported
- Developerclassify_sectors run 37, haiku, taxonomy 2026-10-18b: Builds autonomous solar-powered stratospheric aircraft (StratoSats) for connectivity and observation; no defense use is stated.—Reported
Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.
Sources3
Profile2
- 1
Sixth-Domain · Supports Organization · kind
“{"group": "startups", "id": "a085bfa6-6003-45dc-b681-54ce93badcef", "name": "Radical"}”
- 2
Radical · Supports Organization · description, Organization · name, Organization · website
“Radical builds StratoSats - autonomous solar powered aircraft that fly continuously in the stratosphere without landing. Our StatoSats are optimized for connectivity and observation, offering flexibility without orbital constraints.”
Systems1
- 3CompanyEvenstar
Radical · Supports System
“Evenstar is a persistent, high-performance StratoSat designed to deliver reliable infrastructure from the stratosphere. It is capable of capturing sub-10 cm resolution video and providing direct-to-device 5G connectivity, while operating continuously for months at a time. Powered only by the sun, Evenstar offers extended mission durations, enabling cost-effective and uninterrupted operations from the edge of space - no rocket launch required.”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.