Stalwart Power, Inc. is the older company (2020 vs 2014).
Side-by-Side Comparison
| Metric | SpareBox Storage | Stalwart Power, Inc. |
|---|---|---|
| Founded | ||
| Founded | 2020 | 2014 older |
| Headquarters | ||
| Headquarters | Denver, United States | San Francisco, United States |
| Employees | ||
| Employees | 22 | 11-50 |
| Industry | ||
| Industry | Platforms | Energy, Renewable Energy, Energy Storage |
| Funding Stage | ||
| Funding Stage | Not tracked yet | Seed |
| Total Funding | ||
| Total Funding | Not tracked yet | Not tracked yet |
| Funding Rounds | ||
| Funding Rounds | Not tracked yet | 1 |
| Services | ||
| Services | Not tracked yet | White-labeled Battery Energy Storage Systems, Proprietary String Inverter Technology, Energy Management and Monitoring Software, Grid Services Deployment |
| Target Customers | ||
| Target Customers | Not tracked yet | Utilities, Commercial and Industrial Entities, Government Agencies, OEM Partners |
| Taxonomy | ||
| Taxonomy | Self Storage Properties Management, Customer Experience Optimization, Contactless Rental Process, Online Payment Solutions, 24/7 Accessibility, Storage Industry Innovation | Energy Storage Systems, Battery Energy Storage Solutions, Renewable Energy Integration, Grid Stability, Power Quality, Frequency Regulation, Renewable Power Optimization, Engineered Solutions, Lithium-ion Technology, Large-scale Energy Storage, San Francisco, Commercial Energy Storage, Utility Solutions, Industrial Solutions |
| Website | ||
| Website | spareboxstorage.com | stalwartpower.com |
About SpareBox Storage
SpareBox Storage is a platform launched in August 2020 with the mission to acquire and manage stabilized self storage properties across the United States. Sponsored by Rizk Ventures and spearheaded by industry veterans Kate Matheny and Chuck James, the company is headquartered in Denver, Colorado. I...
About Stalwart Power, Inc.
Stalwart Power, Inc., founded in 2014, is a U.S.-based company operating in the Energy, Renewable Energy, and Energy Storage sectors. The company specializes in providing comprehensive Battery Energy Storage Solutions (BESS) aimed at enhancing the stability and optimization of electrical power syste...
We will tell you when either one moves
BounceWatch watches SpareBox Storage and Stalwart Power, Inc. for new funding, fast hiring, new executives and a change of software vendor. When one happens, we email you the same day.
Funding, hiring, leadership and stack changes at SpareBox Storage and Stalwart Power, Inc. — by email.
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Related Comparisons
Compiled from the BounceWatch company index. We last looked at SpareBox Storage on 4 Dec 2024, and Stalwart Power, Inc. on 18 Aug 2025. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
