VC investor in next-gen infrastructure software
Varion Ventures backs exceptional technical founders, creating enduring building blocks for the variable AI-powered world.
No product or deck is required. Can be your first check and bring the others.
High-conviction investments by a solo GP. Equity or YC SAFE. No board seat.
Supporting founders building for the US market, wherever they're based.
Prior investments
Selected companies Konstantin has personally backed or led seed investments in as a partner at a previous venture firm.
Higgsfield
AI infrastructure for video and image generation
Mastra
Open-source TypeScript framework for AI agents
White Circle
AI safety and alignment infrastructure platform
Entire
Next-gen developer platform for humans and AI agents
Rork
AI-powered mobile app development platform
Twenty
Open-source CRM, a modern alternative to Salesforce
Archestra
Open-source enterprise MCP platform for AI agents
ZML
High-performance, hardware-agnostic AI inference stack
Dosu
Knowledge infrastructure for agents and humans
Keep
Open-source alerting and on-call management platform
Acquired by
Elastic 
Sidekick
AI-powered productivity browser built for work
Acquired by
Perplexity Konstantin Vinogradov
Konstantin Vinogradov
Tech-savvy investor specializing in open source, AI, and infra software, with over a decade of VC experience, including seed checks in Higgsfield, Mastra, White Circle, Keep (acquired by Elastic), and Sidekick (acquired by Perplexity).
Previously Konstantin was a General Partner at Runa Capital, where he also created and led a quarterly ranking of trending open-source startups (the ROSS Index), and headed the development of the fund's internal data platform.
Besides investing, Konstantin founded and chairs the Open Source Endowment. It is the world's first community endowment fund for sustaining critical OSS, co-founded by 50+ open-source leaders including the creators and founders of HashiCorp, Elastic, ClickHouse, Supabase, NGINX, Vue.js, n8n, and curl.
Having been programming since age 13, with a background in math and physics, he loves testing new technologies hands-on and building AI agents for the VC job.
Konstantin only wrote a moderate-sized check initially but has been incredibly helpful since, bringing valuable data insights, investors, and employees to us. We let Runa more than 6x their stake in Mastra at our recent Series A because of him.
Mastra 
