A solo founder is the single founder of a startup, building the company without co-founders and retaining full equity and decision-making authority at formation. Also called a single founder or solopreneur, though "solopreneur" often implies a small lifestyle business while "solo founder" can apply to venture-scale ambition. Solo founders often rely more heavily on early hires, advisors, and mentors to fill skill gaps that co-founders would otherwise cover. The path is statistically less common than co-founded startups (most data shows 60-70% of venture-backed startups have multiple founders) but represents a meaningful share of successful outcomes and is well-suited to specific founder profiles and business types. It is a stru...