World Solver Syndicate
Belgrade, Serbia
Overview
World Solver (WS) is an investment company providing direct access to fast growing off-market venture deals launched by incredible founders and backed by top-tier investors. WS’s investor base includes diverse successful people from all industries, ages, wealths and geographies, having one common goal - to help solve the world while making strong financial returns along the way. Inv thesis: Industry - Opportunistic with a focus on Healthcare, Fintech, and Greentech sectors, prioritising B2B models with AI enhancements that lower costs and improve efficiency. Stage - Primarily Series A/B, with select pre-seed or pre-IPO opportunities. A lead investor is essential, though we’re open to discussions prior. People - We seek 2nd-time founders, two-founder-led teams, or companies with diverse, minority backgrounds. Check size - Typically $150k-$5mm, based on syndicate interest and prior deals. Co-investors: We have successfully deployed capital alongside some of the most significant names in the industry, including Khosla Ventures, Andreessen Horowitz (a16z), Sands Capital, Mercedes, Sony, Bain Capital Ventures, Y Combinator, Accel and many more. Check our website for more information and we hope to partner up!
- Total investments
- 1
- Lead investments
- 1
- Investments · 12mo
- 1
- Active investors
- 1
Sector focus
- Artificial Intelligence (AI)
- FinTech
- GreenTech
- Health Care
- Venture Capital
Investment portfolio
- Refine
Led · Seed · Mar 2026
Refine has built a lesson generator that translates an advanced, PhD-level learning methodology into a structured, scalable prompt system, differentiating it from traditional learning-management solutions. In less than a year, the company progressed from concept to measurable enterprise demand across several markets, validating both the product and the pain point it addresses. Refine focuses on improving business flow, strengthening employee capabilities, and enabling globally distributed organizations to upskill more effectively. The team emphasizes rapid execution and deep research to continually refine its core technology. Recent funding provides resources to meet existing demand rather than merely pursuing new leads. While specific user or revenue figures were not disclosed, the company notes strong enterprise traction as a key operating milestone. Refine intends to keep expanding its product and market reach, positioning itself as a next-generation corporate learning provider.
Team
Mario Grigorov
Founding Syndicate Co-Lead
LinkedIn