While Silicon Valley chases AI unicorns, a 43-person team in North Carolina quietly commands a 21-million-user empire. SignUpGenius isn't just a scheduling tool; it's the invisible infrastructure behind school bake sales, corporate volunteer days, and nonprofit fundraisers across America.

"SignUpGenius proves that in B2B SaaS, 'boring' niches with massive user lock-in beat flashy VC darlings every time."

The team structure is telling. With only 43 employees, they're leaner than most Series A startups. Yet they support millions of users. This isn't a growth-stage company burning cash; it's a profitable, mature operation that likely reached cash flow positivity years ago. The lack of funding data suggests they've never taken outside capital—a rarity in this space.

• Traffic concentration: 97.8% of users come from 'undefined' (likely US-dominated), revealing a massive domestic moat.
• Trust signal: 4,079 Trustpilot reviews at 4.6/5 stars—social proof that compounds over a decade.
• Tech stack simplicity: Tailwind, Bootstrap, Vite. No complex frameworks. They ship fast and keep it lightweight.