While the practices can vary, generally speaking, a startup accelerator will often take an equity stake in the startups they support, ranging from around 3% to 10%. This is in exchange for the capital, mentorship, resources, and networking opportunities they provide.
Business incubators, however, typically do not take an equity stake. Their model is more focused on providing startups with a conducive environment, resources, and guidance to develop their ideas over a longer time period. However, it's essential to note that the terms can vary widely between different programs, so it's crucial to understand the specific terms before joining.