MentionFox lists 20 Energy companies for 2025. Of them, 5 are Y Combinator companies (the newest batch here is Fall 2025, with 2); 1 filed a Form D notice with the SEC; 14 won an SBIR or STTR award. The median SBIR or STTR award in the table is $1.5M, across 14 awards.
Other years
Energy startups in 2025
| Company | What it does | Date | Amount | Round / stage | Record |
|---|---|---|---|---|---|
| Disa Technologies, Inc. | Filed Dec 29, 2025 | $20M | SEC Form D | ||
| Ata Engineering, Inc. | A machine learning-accelerated framework for lethality assessment of directed energy engagements of hypersonic threats | Award starts Sep 30, 2025 | $2M | SBIR Phase II | Federal award record |
| Integrated Solutions For Systems, Inc. | Functional assurance certification process for low energy exploding foil | Award starts Sep 29, 2025 | $2M | SBIR Phase II | Federal award record |
| Tda Research, Inc. | 80nssc25c0487 low-temperature secondary batteries for the lunar surface | Award starts Sep 23, 2025 | $2.8M | SBIR Phase III | Federal award record |
| Icarus | Stratospheric birds for defense | Fall 2025 | Y Combinator batch | Y Combinator listing | |
| Solidec Inc. | Fast-track: direct electrochemical generation of caustic peroxide in a porous solid electrolyte reactor for onsite applications | Award starts Sep 1, 2025 | $1.6M | SBIR Phase I | Federal award record |
| Zephyr Fusion | Powering tomorrow's industrial revolution in space | Fall 2025 | Y Combinator batch | Y Combinator listing | |
| Precision Combustion, Inc. | Fy25 sbir phase iii - solid oxide fuel cell (sofc) system development and evaluation (sd&e) for mars applications | Award starts Aug 28, 2025 | $4.5M | SBIR Phase III | Federal award record |
| Giner, Inc. | Fy25 sbir phase iii - regenerative fuel cell (rfc) 2 kw fuel cell project | Award starts Aug 27, 2025 | $931,318 | SBIR Phase III | Federal award record |
| Aqwest, LLC | Ii: high energy, multi-component, optical isolator for 2 micron fiber lasers | Award starts Aug 12, 2025 | $1.8M | SBIR | Federal award record |
| Benchmark Space Systems Inc | , 80nssc25c0108, aquila - chemical-electric hybrid transfer stage | Award starts Aug 12, 2025 | $847,366 | SBIR Phase II | Federal award record |
| Microlink Devices Inc | Py25 sbir/sttr ccrpp - flexible solar modules with performance-enhancing, low-cost prismatic encapsulation | Award starts Aug 12, 2025 | $1.5M | SBIR | Federal award record |
| Direct Kinetic Solutions Inc | Dks quantum stackable radioisotopic power source (rps) | Award starts Aug 1, 2025 | $985,369 | SBIR Phase II | Federal award record |
| Wecoso, Inc. | 80nssc25c0062 multi-channel stirling convertor space controller (mc-scsc) | Award starts Jul 18, 2025 | $848,472 | SBIR Phase II | Federal award record |
| Element 119 LLC | Topic a234-p027 - energy demand reduction and clean energy tech open topic | Award starts Jun 20, 2025 | $1.9M | SBIR Phase I | Federal award record |
| Nodi Energy | Distributed energy infrastructure unlocking grid power to data centers | Spring 2025 | Y Combinator batch | Y Combinator listing | |
| Greensight Inc. | Topic #: n231-039 "boat & combatant craft electric drive propulsion system. | Award starts Jan 8, 2025 | $1.4M | SBIR Phase II | Federal award record |
| 2WITECH Solutions LLC | This competitive cooperative agreement for a sttr research and development project entitled, “hybridized high-q plasmonic hydrogen… | Award starts Jan 1, 2025 | $1M | STTR | Federal award record |
| Astro | The world’s first AI energy developer | Winter 2025 | Y Combinator batch | Y Combinator listing | |
| Maritime Fusion | Fusion reactors for ships | Winter 2025 | Y Combinator batch | Y Combinator listing |
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AI (37 shared) Climate tech (33 shared) Aerospace and defense (18 shared) Manufacturing and industrial (17 shared) Hardware and semiconductor (16 shared) Mobility and automotive (8 shared)
Figures come only from the record linked in each row; a blank means the record gives none. How these lists are built.