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Ethan Kurzweil

Partner at Bessemer Venture Partners

Ethan Kurzweil is a prominent venture capitalist and board member at LaunchDarkly, a feature management platform that helps software development teams manage feature releases. He is also a partner at Bessemer Venture Partners, a leading venture capital firm based in San Francisco, where he has been instrumental in investing in developer platforms, data infrastructure, and digital consumer applications since 2008.13

Professional Background

Before joining Bessemer, Kurzweil held various roles, including managing the international editions of the Wall Street Journal at Dow Jones & Co. and working at Linden Lab, the creator of Second Life. He co-founded SSB-Bart Group, which focuses on web accessibility for users with disabilities. Kurzweil graduated Phi Beta Kappa from Stanford University and earned an MBA with distinction from Harvard Business School.13

Contributions to LaunchDarkly

At LaunchDarkly, Kurzweil's role on the board involves guiding the company's strategy and growth, particularly as it relates to innovation in software development practices. His investment history includes significant rounds of funding for LaunchDarkly, contributing to its valuation and growth in the tech industry.24

Personal Interests

Ethan Kurzweil is passionate about democratizing access to technology and is particularly interested in new platforms that empower developers and business users alike. He is known for his enthusiasm for the evolving landscape of technology, including gaming and media.3

Highlights

Apr 24 · twitter

If you're building creative assets - video, images, 3D, audio - with AI, there's one platform worth knowing: @ComfyUI !

4M users. 60K+ community-built nodes. 50K daily downloads. 110K+ GitHub stars — top 10 open source AI repositories on earth. "ComfyUI artist" is now a real job title appearing across studios, agencies, and enterprise job boards.

Most creative software is built for the median user — opinionated, abstracted, controlled. ComfyUI inverts this. Technical artists compose models, LoRAs, ControlNets, and community nodes into precise, reproducible workflows the way engineers write code. Every pipeline is a portable JSON file. Every new model that drops — image, video, 3D, audio — gets absorbed into the ecosystem almost immediately.

Chemistry is proud to back the team in their $30M raise, led by @craft_ventures alongside @PaceCap, TruArrow, and @EssenceVenture. In diligence, we spoke with dozens of creative AI tool builders and struggled to find any that weren't built on Comfy. That's community love and product-market fit at its purest. The conclusion was obvious: the creative suite of the future won't look like the tools of the past. It'll look like Comfy! Congrats to @yoland_yan, @robinjhuang, Yannik — and to the community that built this alongside them.

cc/ @loubohan

Jan 20 · twitter

The Selective Autonomy Imperative -- the latest thinking from @ivory_tang and me on the opportunity for agentic AI in the enterprise -- is up: https://t.co/0t3btZiex2 -- thoughts, reactions, heckles?

Related Questions

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Ethan Kurzweil
Ethan Kurzweil, photo 1
Ethan Kurzweil, photo 2
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Location

San Francisco, California, United States