# Cleantech Open

> Cleantech Open is a VC fund backing Renewable Energy and CleanTech. See 341 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Palo Alto, United States
- Total investments: 341
- Last investment: Sep 2024
- Lead investor: 32%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/company/cleantech-open
- X (Twitter): http://twitter.com/cleantechopen
- Website: http://www.cleantechopen.org
- Facebook: http://www.facebook.com/Cleantechopen

Cleantech Open is a VC fund in Palo Alto focused on Renewable Energy and CleanTech. The Cleantech Open is a non-profit organization that runs an accelerator for cleantech startups. It provides infrastructure and processes to develop and motivate entrepreneurs and early-stage companies creating clean and environmentally-sustainable technologies. The company offers support, education, resources, and mentoring services to helpentrepreneurs gain access to potential customers and funding sources, high profile events, and press and publicity.

## Contacts

5 contacts available for Cleantech Open. Shizune tracks 16 team members at Cleantech Open. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/cleantech-open?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Renewable Energy | 52 | 15% |
| CleanTech | 41 | 12% |
| Energy | 28 | 8% |
| Sustainability | 28 | 8% |
| Manufacturing | 25 | 7% |

132 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Funding Round | 93 | 27% |
| Non-equity Assistance | 71 | 21% |
| Pre-Seed | 9 | 3% |
| Grant | 7 | 2% |
| Seed | 4 | 1% |

6 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 148 | 43% |
| Canada | 11 | 3% |
| Italy | 2 | 1% |
| South Africa | 2 | 1% |
| India | 1 | 0% |

13 countries tracked in total.

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Rex Northen | Senior Trainer | 0 | https://shizune.co/investors/profile/rex-northen |
| Andrew Tanner | Mentor | 0 | https://shizune.co/investors/profile/andrew-tanner |
| Beth Zonis | Senior Director | 1 | https://shizune.co/investors/profile/beth-zonis-12c6 |
| Bob Goodman | Mentor | 0 | https://shizune.co/investors/profile/bob-goodman-5e57 |
| David Fogel | Lead Generalist Mentor | 0 | https://shizune.co/investors/profile/david-fogel |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| HydroPhos Solutions | HydroPhos Solutions is transforming wastewater into the future of sustainable agriculture by utilizing internal phosphorus filtration technology to extract phosphorus from discarded sludge, subsequently reselling this phosphorus into the fertilizer industry. | $25K | Non-equity Assistance | Sep 10, 2024 |  |
| Airbuild | By integrating the photosynthetic ability of microalgae with photovoltaic cells, Airbuild is enabling companies and governments to sequester carbon, generate energy, and filter wastewater onsite. |  | Non-equity Assistance | Jul 31, 2024 |  |
| Kite Magnetics | Electric motors enabling electric aircraft of all sizes to fly further, carry more and emit less. The future of aviation is electric. |  | Non-equity Assistance | Jun 26, 2024 |  |
| AlGreen | AlGreen creates microalgae-based air purifiers and refill products to improve indoor air quality using biotechnology. |  | Non-equity Assistance | Jun 07, 2024 |  |
| Hatchless | Hatchless is a real meat that doesn’t harm animals or the planet. |  | Non-equity Assistance | May 24, 2024 |  |
| Pila Energy | Pila Energy develops innovative battery systems and software to provide energy security and energy management for homes and businesses. The company offers a plug-and-play battery solution for renters and homeowners alike that installs via standard outlets, providing backup power, energy savings, and intelligent load management without complexinstallation overhead. Pila’s system integrates advanced battery storage, power electronics, and mesh networking software to optimize energy use and enhance resilience. Pila Energy was founded in 2024 and is headquartered in San Francisco, CA. |  | Non-equity Assistance | Apr 01, 2024 |  |
| AquaDynamics | AquaDynamics is working on a device that can make any water drinkable without any filters or chemicals. |  | Non-equity Assistance | Jan 01, 2024 |  |
| ChargeWonder | ChargeWonder enable EV charging apps to offer in-app ads to helps EV drivers shop, eat, and explore while they charge. |  | Non-equity Assistance | Jan 01, 2024 |  |
| Carbon Utility | Carbon Utility technology capture and convert atmospheric CO2 and hydrogen into valuable low emission products. |  | Non-equity Assistance | Jan 01, 2024 |  |
| Currents | We simplify the complex process of electrification, reduce payback of energy products and offer guidance on the home electrification journey. |  | Non-equity Assistance | Jan 01, 2024 |  |

10 of 341 investments shown.

## Co-investors
- [Creative Destruction Lab](https://shizune.co/investors/profile/creative-destruction-lab) — VC Fund, 3 deals together
- [Los Angeles Cleantech Incubator](https://shizune.co/investors/profile/los-angeles-cleantech-incubator) — VC Fund, 3 deals together
- [MassChallenge](https://shizune.co/investors/profile/masschallenge) — VC Fund, 3 deals together
- [Techstars](https://shizune.co/investors/profile/techstars) — VC Fund, 3 deals together
- [AIBasis Fund](https://shizune.co/investors/profile/aibasis-fund) — VC Fund, 2 deals together
- [Greenland Technologies Holding](https://shizune.co/investors/profile/greenland-technologies-holding) — VC Fund, 2 deals together

## Similar investors

### Similar stage
- [Bpifrance](https://shizune.co/investors/profile/bpifrance) — VC Fund
- [SFC Capital](https://shizune.co/investors/profile/startup-funding-club) — VC Fund
- [HTGF (High-Tech Gruenderfonds)](https://shizune.co/investors/profile/high-tech-gr%C3%BCnderfonds) — VC Fund

## FAQ

### What does Cleantech Open invest in?

Cleantech Open invests primarily in Renewable Energy, CleanTech and Energy startups, most often at Funding Round and Non-equity Assistance stage. Most of the 341 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Cleantech Open?

Public channels for Cleantech Open include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Cleantech Open?

The team at Cleantech Open includes Rex Northen (Senior Trainer), Andrew Tanner (Mentor) and Beth Zonis (Senior Director), among 16 team members tracked by Shizune. The Team section lists each member with their title, investment count and links.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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