S
Solestial
Space · Tempe, United States · Founded 2013
A breakthrough ultra-thin silicon solar cell that can self-cure radiation damage at normal operating temperatures in space MoreLess
Solestial is a solar energy company that specializes in the development of silicon-based solar panels for space applications.
The company's primary focus is on creating low-cost, high-efficiency solar panels that are resistant to the damaging effects of radiation in space. This is achieved through a proprietary technology that allows for the mass production of these panels, which are designed to be easily integrated into a wide range of satellite architectures.
Solestial's business model is centered around supplying its solar panels to satellite manufacturers and operators in both the private and public sectors. The company aims to disrupt the space power market by offering a more affordable and scalable alternative to traditional, more expensive solar panel technologies. By doing so, it seeks to enable a new generation of space-based services and applications that are currently limited by the high cost of power.
Keywords: solar energy, space technology, silicon photovoltaics, satellite components, radiation hardening, space power, aerospace, manufacturing, energy, deep space
Company overview
Solestial company information
The essential company record, classifications and operating signals in one place.
- Status
- Acquired
- Founded
- 2013
- Headquarters
- Tempe, United States
- Employees
- 50
- Open positions
- 10
- Dealroom signal
- 71.8
Valuation & funding
Solestial funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| ACQUISITION✓Exit | May 2026 | $0 | — | York Space Systems | ↗ |
| GRANT✓Other financing | Jul 2025 | $1.2M | — | SpaceWERX | ↗ |
| SERIES A✓Equity / VC | May 2025 | $17M | $68M | Stellar Ventures · Mitsubishi Electric · General Purpose Venture Capital · Techstars | ↗ |
| GRANT✓Other financing | Sep 2023 | $0 | — | NASA | ↗ |
| SEED✓Equity / VC | Oct 2022 | $10M | $40M | German Media Pool VC · Airbus Ventures · Stellar Ventures · AE Industrial Partners | ↗ |
| SEEDEquity / VC | Sep 2021 | Undisclosed | — | ||
| SEEDEquity / VC | Jul 2019 | Techstars | — | ||
| SPINOUT✓Other financing | Jan 2013 | Arizona State University | — |
Financials
Workforce over time
Available workforce history. Financial fields without reported data are omitted.
| Year | Employees |
|---|---|
| 2026 | 46 |
| 2025 | 57 |
| 2024 | 40 |
| 2023 | 36 |
| 2022 | 16 |
Growth signals
Solestial website traffic
Latest recorded traffic for Solestial is 6.9K monthly website visits, up 115.6% over the last three months. Solestial's team declined 12.3% over the past year.
Hiring
Open positions at Solestial
Current openings linked to this company in Dealroom.
Comparisons
Solestial compared with similar companies
Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.
Talent graph
Solestial's talent
Source: Dealroom Talent Intelligence.
Global footprint
Where Solestial has talent and traffic
team presence
In the news
Latest news about Solestial
Recent press, funding announcements, and product moves mentioning Solestial — open to read from the original sources.
Market sentiment
What the market is saying about Solestial
An AI-synthesized read of the highest-engagement posts about Solestial on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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