# Charly Kleissner

> Charly Kleissner is a seed investor backing Information Technology. See 2 investments, check sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Location: Los Gatos, United States
- Total investments: 2
- Last investment: May 2022
- Lead investor: 50%
- Last updated: Oct 2026
- LinkedIn: https://www.linkedin.com/in/karl-charly-kleissner-76aa291/

Charly Kleissner is a seed investor in Los Gatos focused on Information Technology and Software. Charly is a philanthropic entrepreneur who uses his high-tech background in his venture philanthropy. Together with his wife Lisa, he co-founded KL Felicitas Foundation, which focuses on enabling social entrepreneurs and enterprises worldwide, and advocates for a sustainable, mission-driven, and social investment strategy. Charly is also co-founderof the Social-Impact initiative helping social entrepreneurs worldwide to accelerate and increase their social impact. He serves on the advisory boards of multiple nonprofits including the Acumen Fund, Global Social Benefit Incubator, and Global Philanthropy Forum.Charly has over twenty years of experience as a senior technology executive in Silicon Valley. He held executive and senior engineering management positions at Ariba Inc., NeXT Software Inc., Digital Equipment Corp., and Hewlett-Packard Company. He has authored two software patents, published numerous articles and he is co-author of Solutions for Impact Investors: From Strategy to Implementation. He holds a doctorate in computer science from the University of Technology, Vienna, later receiving their Distinguished Alumnus award.

## Contacts

5 contacts available for Charly Kleissner: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/charly-kleissner?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Information Technology | 2 | 100% |
| Software | 1 | 50% |
| Blockchain | 1 | 50% |
| Social Impact | 1 | 50% |
| Data Integration | 1 | 50% |

8 industries tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Switzerland | 1 | 50% |
| United States | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Rainfall | Rainfall is a privacy-preserving intelligence platform that uses Edge-AI and Web3 technology to unlock the economic value from your data. | $1M | Seed | May 23, 2022 | https://rainfall.one/ |
| Proof of Impact | Proof of Impact (POI) is the leading B2B SaaS ESG and Impact Data Intelligence Platform. The company incorporates a micro-services architecture to collect, visualize, and analyze ESG and impact data. The company was founded in 2019 and is headquartered in San Diego, California. | $2.3M | Seed | Dec 15, 2021 | https://proofofimpact.com/ |

2 of 2 investments shown.

## Co-investors
- [Altera Investments](https://shizune.co/investors/profile/altera-investments) — VC Fund, 1 deal together
- [Ausum Ventures](https://shizune.co/investors/profile/ausum-ventures) — VC Fund, 1 deal together
- [Blufolio](https://shizune.co/investors/profile/blufolio) — VC Fund, 1 deal together
- [CV VC](https://shizune.co/investors/profile/cv-vc) — VC Fund, 1 deal together
- [D3 Jubilee](https://shizune.co/investors/profile/d3jubilee) — VC Fund, 1 deal together
- [Franklin Templeton](https://shizune.co/investors/profile/franklin-templeton-investments) — VC Fund, 1 deal together

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### Similar country
- [SICTIC](https://shizune.co/investors/profile/sictic) — VC Fund
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- [Zürcher Kantonal Bank](https://shizune.co/investors/profile/z%C3%BCrcher-kantonalbank) — VC Fund

## Featured in investor lists
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## FAQ

### What does Charly Kleissner invest in?

Charly Kleissner invests primarily in Information Technology, Software and Blockchain startups, most often at Seed stage. Most of the 2 investments tracked by Shizune back companies in Switzerland. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Charly Kleissner?

Public channels for Charly Kleissner include LinkedIn. 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.

### When did Charly Kleissner last invest?

The most recent investment recorded for Charly Kleissner closed in May 2022. Shizune tracks 2 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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