Business incubators provide idea development, strategy development, and sponsorship over 6 months to 2 years but do not provide direct funding. Business accelerators focus on marketing and networking over 3 to 6 months and provide seed funding in exchange for fees or a percentage of the business. Both are extremely competitive and require following their schedules, which can include giving up business shares, though incubators and accelerators vary and include virtual, university-based, and private options like Y Combinator and Techstars that aim to help startups.