43

43.io is a unique pre-product venture capital fund dedicated to helping founders navigate the early stages of their startup journey, even before product-market fit is achieved. The fund is renowned for leading the earliest rounds and writing first checks, often when a company has no product, traction, or significant social proof. With a high-conviction approach, 43.io typically seeks a 5% ownership stake and limits each investor to only five investments annually. This allows the team to work closely with founders, providing not just capital but strategic guidance and operational support throughout their growth. Founded by experienced investors and operators, the team includes Dustin, who previously co-founded Spearhead and has invested in companies like Patreon and PillPack; Anabel, an expert in people operations who scaled Opendoor from 30 to 600 employees; and Soso, who bootstrapped Growth Pilots and oversaw massive ad campaigns for companies like Instacart and Zapier. Together, they bring deep expertise in scaling, growth marketing, and people management. Geographically agnostic and sector-neutral, 43.io targets startups across various industries, making it ideal for mission-driven founders seeking a high-touch partner. The fund’s strategy emphasizes active participation, leveraging networks and experience to help startups overcome early challenges. Founders are encouraged to approach 43.io at the very beginning of their journey, as the team excels in providing support before product development. This combination of early investment and operational assistance makes 43.io a go-to partner for ambitious startups looking for a dedicated, hands-on investor​.