How to Give a Great Demo Day Pitch: A Practical Guide

A great demo day pitch says what your company does in the first sentence, shows the one number that proves people want it, and ends with a clear ask. Keep one idea per slide, rehearse out loud against a timer until the words come easily, and follow up with every interested person within a day of the event.

Our own Residency Demo Day for Cohort 4 is on Tuesday 17 November 2026 at 5pm at the house, 124 Manyani East Road, so pitching is on my mind this month. This guide sets out how I would prepare for any demo day stage.

What is a demo day pitch meant to do?

A demo day pitch has one job: to make the right people want to talk to you afterwards. Y Combinator's guide to demo day presentations describes the goal as intriguing your listeners enough that they want to meet you and learn more (Y Combinator). Plan the pitch, the slides and your follow-up around those conversations.

The room is usually mixed. Investors sit next to possible partners, mentors, customers and other founders. Decide before you write a word who you most want to hear from after the event, and shape the ask for them.

How should I open a demo day pitch?

Say what you do, in plain words, in your first sentence. Here is a made-up example: "We help boda boda riders in Nairobi pay for fuel in small daily amounts." Anyone in the room could repeat that to a friend over dinner, which is the test.

YC's guide lists jargon, complex phrasing and marketing boilerplate among the common mistakes, and warns against burying your strongest point. Try your opening line on someone outside tech. If they cannot say your business back to you, rewrite it before you touch the slides.

What should go on my demo day slides?

Use as few slides as your slot allows, with one idea on each. An order that works for most early-stage companies:

1. What you do. One line and one image.
2. The problem. Who has it, how often, and what it costs them today.
3. The product. Show it with screenshots or a short screen recording. Venue internet can fail, so keep the demo on your laptop.
4. Traction. Your strongest number, large enough to read from the back.
5. Why you, and why now. What your team knows that others do not, and what has changed in the market.
6. The ask. The amount you are raising, or the partner or customer you want, and what it will let you do.

YC's guide says slides should be simple enough to understand at a glance. Use large type, few words and strong contrast. If a slide needs a paragraph, say the paragraph out loud and cut it from the slide.

Which numbers should I show investors?

Show the number that survives a follow-up question. Paying customers, monthly revenue, repeat use and growth rate tell investors more than downloads or sign-ups. If your numbers are small, show how they have moved. Say, as an example, that you have 40 paying customers, up from 10 three months ago. That growth tells a clearer story than a large market size with nothing beneath it.

Know how you count every figure. Someone will ask, and one number that falls apart under questions makes the room doubt the others.

If you have no revenue yet, use the strongest evidence you do have: signed pilots, a waiting list that converted to paid, or letters of intent from customers. YC's guide notes that without traction you lean more on your story, your team and your credentials, so make those specific.

How do I rehearse a demo day pitch?

• Rehearse standing up, out loud and with a timer, many times in the final week.
• Pitch to your team, to a mentor and to someone who will tell you plainly where they got lost.
• If you run over, cut a sentence. Speaking faster makes you sound nervous and loses the room.
• Write answers to the questions you fear most: how you make money, why a bigger company will not copy you, how you got your numbers and what the money is for.
• Rehearse the parts around the pitch too: walking on, the first few seconds, and what you will do if the clicker or the video fails.

Ask the organisers early how long your slot is, whether questions come straight after, and what format they want your slides in. Then rehearse to finish a little under time.

How should I close and follow up?

End with the ask, say thank you once, and stop.

Prepare the follow-up before the event. Have a one-page summary ready and a short email drafted. Send it the same evening to everyone who showed interest: one line on what you do, your headline number, a link to the one-pager or deck, and two times you could meet. People meet many founders at a demo day, and a quick, clear email makes you easy to remember.

How can I see a demo day before I pitch at one?

Go and watch one. The Cohort 4 Residency Demo Day is on Tuesday 17 November 2026 at 5pm at the house, and you will find it on our events calendar. Watching founders pitch live shows you quickly what holds a room and what loses it.

If you want to be on that stage yourself, the Hackhouse Residency is a 12-week programme that takes no equity and ends with a Demo Day finale. It asks for about 20 hours a week, with sessions on Wednesdays from 3 to 9pm and Saturdays from 2 to 4pm. Applications for HH Gen 27.1 are open for the Spark track (idea stage, KES 25,000) and the Scale track (growth stage, KES 35,000).

Key facts

• Open with what you do, in one plain sentence.
• Keep one idea per slide, readable from the back of the room.
• Lead with the number that holds up under questions: paying customers, revenue, repeat use or growth.
• Close with a specific ask, then stop talking.
• Follow up with every interested person the same evening.
• Hackhouse Residency Cohort 4 Demo Day: Tuesday 17 November 2026, 5pm, 124 Manyani East Road, Nairobi.

Frequently asked questions

How long is a demo day pitch?

It depends on the programme, so ask the organisers for your exact slot and whether it includes questions. Whatever the length, rehearse to finish slightly under time.

Should I give a live demo on stage?

Only if it works without the venue's internet and you have rehearsed it many times. A short screen recording on your own laptop shows the product without the risk.

What if my startup has no revenue yet?

Show the strongest evidence of demand you have, such as paid pilots, pre-orders or signed letters of intent, and be clear about what the next milestone is and what it will take to reach it.

Can I attend the Hackhouse Residency Demo Day?

The Cohort 4 Demo Day on Tuesday 17 November 2026 at 5pm is listed on our events calendar, where you can see the details.

Sources

• A Guide to Demo Day Presentations, Y Combinator, checked 5 Nov 2026
• Hackhouse Residency, Hackhouse Africa, checked 5 Nov 2026
• Events, Hackhouse Africa, checked 5 Nov 2026

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