Incubators provide affordable workspace and services like management training and marketing support to young startups. Their goal is to nurture ideas during the early months or years and provide access to financing. Accelerators help startups define products, identify customers, and secure resources like capital over a limited duration program. Both provide networking and training, but accelerators invest in companies and expect a return, while incubators rent out space. The main difference is incubators support early idea stages while accelerators help startups reach minimum viable product and gain traction.