Bill Nussey
Angel Investor @ Tech Square Ventures
Atlanta, United States
Bill Nussey is a seed investor at Tech Square Ventures in Atlanta focused on Energy and Software. Bill Nussey is CEO of Freeing Energy, a media organization that began as a TED talk and grew to become the #1 ranked renewable energy podcast (Feedspot). Bill is also the author of a new book called Freeing Energy, which was Amazon’s #1 New Release in the energy, solar, and energy policy categories.Freeing Energy targets entrepreneurs, investors,and policy innovators with a radical and widely overlooked path to a clean energy future: local-scale energy systems for families and communities like rooftop solar and microgrids. It offers a practical guide to this trillion-dollar opportunity that will disrupt and democratize the world’s energy industries.He is also the CEO and co-founder of Solar Inventions, a startup created to commercialize a family of patented, scientific breakthroughs for improving the manufacturing of solar cells and panels.Bill is a career tech CEO. His companies have created thousands of jobs and billions of dollars in value. His first startup, which he co-founded in high school, provided graphics software for early, text-based personal computers. His second company, Da Vinci Systems, was started in his college dorm room and grew to serve millions of users across 45 countries. Later, he spent several years as a venture capitalist with Greylock. In 1998, he left the firm to run a portfolio company, iXL, which went public and grew to almost $500 million in revenue. After iXL, he joined Silverpop as CEO. Silverpop grew to nearly $100 million and became a global leader in cloud-based marketing. In 2014, IBM acquired the company and made it the foundation of the IBM Marketing Cloud. Shortly after the acquisition, Bill was promoted to VP of Corporate Strategy out of IBM's world headquarters in New York, helping lead global strategy for the company’s CEO and SVPs. Bill received a degree in electrical engineering from North Carolina State University and an MBA from Harvard Business School. He has received several patents and has published three books.
- Total investments:
- 6
- Last investment:
- Lead investor:
- 50%
Last updated:
For AI agents: llms.txt
Industries Bill Nussey invests in
Stages Bill Nussey invests in
Countries Bill Nussey invests in
Contacts
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Investment Focus
Industry
- Energy 2 (33%)
- Software 2 (33%)
- Analytics 1 (17%)
- Logistics 1 (17%)
- Wearables 1 (17%)
Stage
- Seed 3 (50%)
- Series A 2 (33%)
- Series B 1 (17%)
Country
- United States 4 (67%)
- United Kingdom 1 (17%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Cerby is the identity automation platform purpose-built to secure disconnected applications—those that fall outside the reach of traditional identity security tools. By integrating with existing IAM, IGA, and PAM systems, Cerby brings centralized access controls, automates manual security tasks, and extends governance across your entire applicationecosystem. IT and security teams gain complete visibility and control, reducing risk and operational overhead. Founded in 2020, Cerby is backed by leading investors and trusted by global enterprises. | Series B / Sep 24, 2025 | ||
| Qualytics replaces reactive data firefighting with proactive, automated quality at scale. Our platform automates and maintains 95% of rules, aligning business and technical users in a single workflow. With governance, auditability, and security built-in, Qualytics delivers reliable data that drives faster decisions and AI readiness across theenterprise. | $10M / Series A / Jun 23, 2025 | ||
| HeroWear is a workforce wearable company that is developing a suite of assistive clothing solutions that reduce fatigue and physical strain on workers. Their first product, the Apex, is the first exosuit built from the ground up for both men and women. It's a back-assist exosuit that is designed to reduce strain on the back while fitting likea comfortable piece of clothing. It features patent-pending dual-mode technology to make it easy to turn the back assistance on or off, allowing it to be used in nearly any work situation. The textile-based design is modular, allowing for over 50 possible combinations so that the fit and the amount of support provided are perfect for anyone in any job. | $5M / Series A / Apr 03, 2025 | ||
| Sunsave is a subscription-based platform that helps households to save solar battery system. | $6.8M / Seed / Dec 05, 2023 | ||
| VECKTA is the Energy Transition Market Platform. VECKTA integrates the world’s most advanced energy system engineering tools with an end-to-end marketplace to integrate and accelerate the development of distributed energy systems (DES) and microgrid projects. VECKTA empowers businesses and communities to quickly and easily baseline their energysituation today, customize a solution specific to their needs (cost, reliability and/or emissions) and then seamlessly engage and contract the best equipment, services, and capital providers in the market to finance, deploy and operate it sustainably and profitably. | $3.5M / Seed / Jun 27, 2023 | ||
| Qualytics replaces reactive data firefighting with proactive, automated quality at scale. Our platform automates and maintains 95% of rules, aligning business and technical users in a single workflow. With governance, auditability, and security built-in, Qualytics delivers reliable data that drives faster decisions and AI readiness across theenterprise. | $2.5M / Seed / Dec 22, 2022 |
Co-Investors
About Tech Square Ventures
Tech Square Ventures is an Atlanta-based early-stage venture capital firm investing in enterprise, marketplace, platform, and tech-enabled service companies. We are a team of founders, operators, and investors that partner with visionary entrepreneurs to help them with what they need most – access to markets and customers. Our platform is built ona strategic network of innovation ecosystem and corporate, and university relationships that help founders inform and accelerate go-to-market strategies.
Tech Square Ventures Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Blake Patton
Managing Partner & Founder
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Hyundo Kwon
Analyst
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Scott Lopano
Partner
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Vasant Kamath
Partner
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FAQ
What does Bill Nussey invest in?
Bill Nussey invests primarily in Energy, Software and Analytics startups, most often at Seed and Series A stage. Most of the 6 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 Bill Nussey?
Public channels for Bill Nussey 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.
When did Bill Nussey last invest?
The most recent investment recorded for Bill Nussey closed in Sep 2025. Shizune tracks 6 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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