What is demo day?

The last day of the programme

Accelerators take a group of early companies through a fixed programme, often around three months; Techstars, for example, describes its accelerators as three months of intensive, mentor driven support. The programme ends with a showcase that gives the whole cohort access to investors at once. Y Combinator describes its own demo day as its latest batch presenting to an invite only audience of roughly 1,500 investors and media. Smaller programmes, university incubators and corporate accelerators run the same format at a smaller scale, sometimes with fifty people in the room. Whatever the size, the structure is the same: a running order, a strict time limit per company, a shared screen, and investors noting which companies they want to hear more from.

How long the pitch is, and what fits

The programme sets the time, and it varies. Large cohorts get the least time per company, sometimes a minute or two, while smaller programmes often allow three to five minutes. The time limit is enforced, so the deck has to be built backwards from it. At roughly one slide every thirty to forty seconds, a five minute pitch holds eight to ten slides and a two minute pitch holds four or five. What survives the cut is what an investor needs to decide whether to ask for a meeting: what the company does in one plain sentence, the strongest number, why the market is large, why this team, and the ask. Everything else, including the detailed business model and the competitive table, moves to the deck sent afterwards.

Why it is built differently from a meeting deck

An investor meeting is a conversation, and the deck supports questions. A demo day pitch is a broadcast with no questions, delivered to people standing at the back of a large room or watching a stream on a laptop. That means the type has to be big enough to read from thirty metres, one idea per slide, and the headline number early rather than saved for a reveal. Live product demonstrations are risky on a shared stage because of wifi, projector resolution and hard time limits, so many teams use a single clear screenshot or no product image at all. The close should be one ask with a name and a way to reach it, since investors act on the pitches that make following up easy.

Common mistakes

The most common is cramming a full investor deck into the time, speaking faster instead of cutting slides, and running out of time before the ask. The second is a long problem story when the audience needs only one sentence to understand it. The third is burying traction on slide seven, by which point half the room has decided. The fourth is small text and dense charts that cannot be read beyond the front rows or on a video stream. The fifth is a vague ask, such as looking for partners, instead of the round size and a contact. The last is not rehearsing to the clock with the actual slides, because a pitch that fits in a practice room often overruns on stage.

Demo day decks in the slide builder

The demo day example linked on this page is an eight slide, five minute pitch for a fictional manufacturing startup that opens with its strongest number, states the problem in a single line and closes on one next step with a name and an address. A deck like it can be generated from a brief, with the length slider set from 3 up to 20 slides; a free account is capped at 6 slides, which still suits a very short demo day slot. Every slide is drawn on a 1920 by 1080 canvas, so it fills a widescreen projector without letterboxing. Organisers often ask for the file in advance, and the PDF export is available on every plan, while PowerPoint export needs a paid plan.

Questions people ask