Cambrian Ventures is a solo-GP, non-lead pre-seed/seed fund that collaborates with top multi-stage firms rather than competing with them, positioning itself as connected capital that plugs founders into larger funds while leveraging deal flow from its 15k+ newsletter, thousands of meetup members, and 1,500+ founder Slack community. The fund's LP base consists of 20+ iconic fintech founders who serve as advisors, co-investors, and customers to portfolio companies, while Rex's background spans investment banking, fintech engineering, community building, and helping build a16z's fintech practice.