Konstantin Vinogradov

Konstantin Vinogradov — VC Investor in Open Source, AI and Infrastructure Software

Hi 👋🏻

I’m a VC investor specializing in open source, AI, and infrastructure software, with over a decade of experience backing early-stage startups. Previously, I was a General Partner at international venture firm Runa Capital.

Beyond investing, I founded the Open Source Endowment, created and led the ROSS Index (a quarterly ranking of the fastest-growing open-source startups, 2020–2025), and published growth benchmarks and other OSS-related research notes.

I started programming at 13 to build games, studied math, physics, and CS at university, and still enjoy coding and exploring new technologies hands-on. Especially with Claude Code!

Nowadays I’m based in London and often spend time in the SF Bay Area.

Investments

Today I partner with technical founders as an angel investor, offering open source expertise, unique data-driven insights, and a strong network of infra software funders and operators.

Earlier in my career, I was a General Partner at Runa Capital ($600M+ AUM), which has backed 100+ enterprise software and deep-tech startups since 2010 — including n8n, Mambu, Nginx, MariaDB, and Pasqal. I also originated the firm’s seed program and internal AI & data platform — approaches I actively continue to apply today.

Select seed and pre-seed investments I made personally or at Runa:

  • Mastra: Leading open-source TypeScript AI agent framework
  • Entire: Next-gen developer platform for humans and AI agents
  • White Circle: AI guardrails and red-teaming platform for businesses
  • Twenty: Leading open-source enterprise CRM platform
  • Higgsfield: AI video and image generator for social media
  • Rork: AI-powered mobile app building platform
  • Archestra: Enterprise MCP Platform for AI Agents
  • Dosu: AI teammate that manages documentation for engineering teams
  • Keep: Open-source AIOps and alert management (acquired by Elastic)
  • Sidekick: Work-focused browser based on Chromium (acquired by Perplexity)

Philanthropy

Charity is an important part of my life philosophy, and I’ve channeled this into building tech-enabled communities, endowments, and nonprofit projects.

My largest initiative, co-founded with tech founders, VCs, and OSS creators, is the Open Source Endowment — the world’s first endowment fund exclusively dedicated to open source. It creates a truly sustainable funding source for maintainers by leveraging similarities between OSS and universities, a data-driven approach to donations, and other original ideas.