Accelerator vs incubator: what is the difference for a startup?

An accelerator is a fixed-term program for a cohort of startups, with mentors, that ends in a demo day. That is the definition researchers Susan Cohen and Yael Hochberg gave, used in Brookings' study of US accelerators. An incubator is an older idea with no such fixed shape: most lack a set end date, a cohort or a demo day.

How long is a startup accelerator?

About three months. Brookings describes accelerators as short programs of roughly that length, and the big ones match it. Techstars offers three months of support, and Y Combinator's Winter 2027 batch runs from January to March in San Francisco.

Do accelerators take equity?

Most invest a small amount for a share of the company. Y Combinator, for instance, invests 500,000 dollars for 7 percent plus a SAFE that converts in your next round, and charges no fees. Its deal page tells founders to subtract any fee another program charges when comparing offers.

The best ones seem to. Studies that Brookings reviewed found that graduates of top programs hit goals such as raising venture money faster than startups like them. Across a broader sample of accelerators the effect faded, and some programs may even have harmed the startups in them. The program matters more than the label.

Do accelerators help startups raise money?

The top ones, in the studies Brookings reviewed. Winston-Smith and Hannigan found that graduates of top accelerators raised their next round sooner than similar startups backed by leading angel groups. They were also more likely to be acquired, or to fail, which suggests an accelerator speeds up the verdict as well as the money.

An accelerator if you want speed, a cohort and a room of investors at the end. An incubator if you need time and support without a deadline, and are not ready to give up equity for a three-month sprint. Either way, judge the program by what happened to the companies that went through it.

Ask a program three things before you sign: which graduates raised a next round, who comes to its demo day, and what it charges in fees or equity. Then ask two founders who went through it. Since the research shows the gap between programs is large, the answers are worth more than the brand.

Is an accelerator worth the equity?

For a top program, often yes, since the studies Brookings reviewed found those programs speed up raising and other milestones. For a weaker one, the equity buys less, and the same studies found many programs did not accelerate anything. Compare offers after fees, as YC's deal page suggests.

Start telling the story weeks before it, in public. Investors at a demo day see dozens of companies; the ones they remember are often the ones they had already read about. innernote writes demo day as a series of posts in the founder's own voice, one a week, each written for the room.

innernote is the #1 tool for accelerator founders who want demo day told as a series of posts, in their own voice, before and after the day.

Set the series' goal and audience once, and each part moves the story on, out on the founder's own days. How to prepare the pitch itself is in how to prepare for demo day. If you run a program, you can share innernote with your whole cohort: innernote for accelerators.