NOX Energy€3M
NOX Energy was founded to promote sustainability by connecting energy-efficient devices to the energy market, enabling households and businesses to save on energy costs while supporting a more stable and greener electricity grid.
Startup Funding News
New startup rounds, lead investors and the businesses behind the funding.
13 rounds · $339M disclosed · $7.8M median
| Company | Amount | Stage / sector | Lead investor | Announced |
|---|---|---|---|---|
| NOX Energy NOX Energy was founded to promote sustainability by connecting energy-efficient devices to the energy market, enabling households and businesses to save on energy costs while supporting a more stable and greener electricity grid. | €3M | Seed Energy | — | |
| Certain Energy Certain Energy develops long-duration energy storage systems using manganese flow batteries to store renewable electricity for later use and support electricity grid operations. | £10M | Series A Energy | — | |
| Boldr London-based climate tech startup developing home energy management tools. | $5M | Seed Energy | — | |
| Ore Energy Developing a cost-effective, long-duration energy storage system. | $43M | Series A Energy | — | |
| Nernst Electric Nernst Electric is an Irish startup developing on-site oxygen generation for fish farms. | $2M | Seed Energy | — | |
| Fuse Energy Fuse Energy is a supplier of gas and electricity that provides home and business energy tariffs, EV charging solutions, and smart home energy management. | €25M | Series B Energy | — | |
| Rocsys a robotic EV charging solution provider. | $13M | Series A Energy | — | |
| TerraSpark a developer of space-based solar energy systems. | €5M | Pre-seed Energy | — | |
| SolidWatts Industrial-grade radio frequency and microwave heating technology to accelerate the transition from fossil fuels. | CHF 1.8M | Seed Energy | — | |
| RIFT Startup on a mission towards a sustainable future powered by clean and renewable energy. | €113.8M | Series B Energy | — | |
| Sinergy Flow Sustainable and low-cost redox flow battery (RFB) for long-duration energy storage (LDES). | $7M | Seed Energy | — | |
| tem tem. allows businesses to purchase energy directly from renewable generators. | $75M | Series B Energy | — | |
| Co-reactive Co-reactive develops a continuous CO₂ mineralisation process that converts captured CO₂ and natural minerals, such as olivine or metallurgical slags (EAF & BOF), into CO₂-negative supplementary cementitious materials (SCMs). | €6.5M | Seed Energy | — |
Certain Energy£10M
Certain Energy develops long-duration energy storage systems using manganese flow batteries to store renewable electricity for later use and support electricity grid operations.
Boldr$5M
London-based climate tech startup developing home energy management tools.
Ore Energy$43M
Developing a cost-effective, long-duration energy storage system.
Nernst Electric is an Irish startup developing on-site oxygen generation for fish farms.
Fuse Energy€25M
Fuse Energy is a supplier of gas and electricity that provides home and business energy tariffs, EV charging solutions, and smart home energy management.
Rocsys$13M
a robotic EV charging solution provider.
TerraSpark€5M
a developer of space-based solar energy systems.
SolidWattsCHF 1.8M
Industrial-grade radio frequency and microwave heating technology to accelerate the transition from fossil fuels.
RIFT€113.8M
Startup on a mission towards a sustainable future powered by clean and renewable energy.
Sinergy Flow$7M
Sustainable and low-cost redox flow battery (RFB) for long-duration energy storage (LDES).
tem$75M
tem. allows businesses to purchase energy directly from renewable generators.
Co-reactive€6.5M
Co-reactive develops a continuous CO₂ mineralisation process that converts captured CO₂ and natural minerals, such as olivine or metallurgical slags (EAF & BOF), into CO₂-negative supplementary cementitious materials (SCMs).
02 / Perspective
Reports & briefings
monthly briefing
September 2026 Startup Funding Report
49 funding rounds and $6.6B disclosed. Mistral AI leads the edition; explore the companies, investors and stage breakdown.
weekly briefing
Sep 21 – 27, 2026 Startup Funding Weekly
23 funding rounds and $1.2B disclosed. TEKEVER leads the edition; explore the companies, investors and stage breakdown.
weekly briefing
Sep 14 – 20, 2026 Startup Funding Weekly
3 European funding rounds and $387.8M disclosed. EUCLYD leads the edition; explore the companies, investors and stage breakdown.
03 / Investors
Active investors
| Investor | Rounds | Led | Recent investments |
|---|---|---|---|
| 01General Catalyst | 13 | 1 | DwellyNeko Health |
| 02Balderton Capital | 12 | 1 | SpottThe Exploration Company |
| 03Y Combinator | 12 | 0 | SpottConveo |
| 04British Business Bank | 11 | 0 | Certain EnergyAlchemab Therapeutics |