Sara Blakely spent seven years selling fax machines door-to-door for an office-supply company — being turned away and having her business card ripped up at least once a week — before starting Spanx with $5,000 of her own savings in 2000, writing her own patent, keeping the company entirely self-funded for 21 years, and eventually selling a majority stake to Blackstone in 2021 at a valuation of about $1.2 billion
Sara Blakely built a billion-dollar company on $5,000 of her own money and never took a cent from outside investors.