Konstantin Vinogradov
About Konstantin Vinogradov
Konstantin Vinogradov is based in London. His personal site describes him as an early-stage investor in open source, AI and infrastructure software with over a decade of experience backing tech startups. He is a Kauffman Fellow (Class 30).
He joined Runa Capital in 2012 and became a General Partner there. Third-party profiles say that before Runa he co-founded and sold a cryptocurrency mining company and ran an international startup competition. At Runa he created the ROSS Index, a quarterly ranking of trending open source startups, and led the fund's internal AI and data platform. He holds B.S. and M.S. degrees from the Moscow Institute of Physics and Technology.
He founded and chairs the Open Source Endowment, a community endowment for critical open source software. He was named to Forbes 30 Under 30 in 2019 and to the OpenUK Honours List in January 2026. Crunchbase lists him as Founder and Managing Partner of Varion Ventures (2026), which his own site does not mention.
His site says he now works with technical founders as an angel investor. He offers open source expertise, data-driven insights and a network of infrastructure software funders and operators. Crunchbase mentions seed checks in Higgsfield, Mastra, White Circle, Keep (acquired by Elastic) and Sidekick (acquired by Perplexity).
Before going solo he was at Runa Capital, which his site says has backed more than 100 enterprise software and deep tech startups since 2010. He says he originated Runa's seed program. Runa's portfolio includes n8n, Mambu, Nginx, MariaDB, Lace Lithography and Pasqal.
The most recent AI round on the Lounge deals desk is ZML's $20M seed in July 2026. ZML is a Paris-based company building a chip-agnostic inference server for running open source LLMs across hardware from Nvidia, AMD, Google and others. Dealroom lists him among its investors.
His site lists these AI-related angel investments: Mastra (open source TypeScript AI agent framework), Entire (developer platform for humans and AI agents), White Circle (AI guardrails and red-teaming), Higgsfield (AI video and image generation), Rork (AI mobile app builder) and Archestra (enterprise MCP platform for AI agents). He has posted on LinkedIn that most AI workloads will eventually run on open source models, and that this is part of his thesis.
He describes himself as an early-stage investor in open source, AI and infrastructure software, and he works with technical founders. His X profile lists London and San Francisco. He has not published an angel check size, so none is given here.
- ZML: chip-agnostic LLM inference, $20M seed in July 2026
- Mastra: open source TypeScript AI agent framework
- Entire: developer platform for humans and AI agents
- White Circle: AI guardrails and red-teaming platform
- Twenty: open source enterprise CRM
- Higgsfield: AI video and image generator
- Rork: AI-powered mobile app building platform
- Archestra: enterprise MCP platform for AI agents
- Keep: open source alerting platform, acquired by Elastic (Crunchbase)
Investing activity
Konstantin Vinogradov appears in 1 AI deal tracked by the Lounge deals desk, rounds totalling $20M. The rounds are mostly Seed, with a median round size of $20M. The most recent is ZML (Seed, $20M, Jul 2026).
Konstantin Vinogradov most often invests alongside Solomon Hykes, Kindred Capital, Drysdale Ventures and >commit, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Konstantin Vinogradov
Who is Konstantin Vinogradov?
He is a London-based early-stage investor in open source, AI and infrastructure software. He was previously a General Partner at Runa Capital and founded the Open Source Endowment.
What AI startups has Konstantin Vinogradov invested in?
His site lists Mastra, Entire, White Circle, Higgsfield, Rork and Archestra. He also joined ZML's $20M seed in July 2026.
What stage does Konstantin Vinogradov invest in?
He describes himself as an early-stage investor, and Crunchbase cites seed checks. He has not published a more specific stage range.
What is Konstantin Vinogradov's check size?
He has not publicly stated an angel check size. Third-party sites list a range for his time at Runa Capital, but that was fund investing and not his own angel checks.
What does Konstantin Vinogradov look for in founders?
His site says he partners with technical founders and offers open source expertise, data-driven insights and a network of infrastructure software funders. His LinkedIn bio says he invests in ambitious technical founders using AI.
How can founders contact Konstantin Vinogradov?
He is reachable through his LinkedIn profile, his X account @vinogradovk and his personal site, kvinogradov.com.
Is Konstantin Vinogradov an angel investor?
Yes. Konstantin Vinogradov invests personally as an angel.
What AI companies has Konstantin Vinogradov invested in?
Konstantin Vinogradov's AI investments include ZML. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Konstantin Vinogradov invest at?
In the rounds tracked on Lounge, Konstantin Vinogradov has invested at Seed, with a median round of $20M.
Who does Konstantin Vinogradov co-invest with?
Konstantin Vinogradov's most frequent co-investors on Lounge are Solomon Hykes (1 deal), Kindred Capital (1 deal), Drysdale Ventures (1 deal), >commit (1 deal) and Kima Ventures (1 deal).