Startup accelerators are programs designed to support early-stage companies by providing resources, mentorship, and funding. These programs typically last a few months and culminate in a "demo day," where startups present their business ideas to potential investors. Participants often receive guidance from experienced entrepreneurs and industry experts, helping them refine their business models and strategies. Accelerators usually accept a cohort of startups at once, fostering a collaborative environment where founders can learn from each other. Many well-known accelerators, such as Y Combinator and Techstars, have successfully launched numerous companies that have gone on to achieve significant growth and success.