Seed pitch deck structure using YC's slide template
Y Combinator's seed deck template is built for clarity, not decoration. With Canadian seed dollars down 31% in H1 2026, every slide has to earn its place.
A seed deck has one job. It must tell a clear story an investor can repeat to their partners. Y Combinator's template, written by Aaron Harris for YC's Winter 2018 Demo Day, is still the most practical structure. Harris's rule is clarity and concision. He writes that most seed companies do not have much meaningful detail to explore, and that pretending otherwise muddles the story.
Why the bar is higher in 2026
CVCA data shows Canadian seed funding fell to $285 million across 82 deals in the first half of 2026, down 31% in dollars from a year earlier. Fewer cheques means investors are more selective. A deck that is hard to follow loses the meeting.
The YC seed deck, slide by slide
1. Title. Company name and a one-line description of what you do. Harris says this is the only section limited to a single slide.
2. Problem. State it clearly. Specifics about how the problem affects real people or businesses add weight.
3. Solution. Explain what you do in as few words as possible. Describe the concrete benefit.
4. Traction. Show your numbers if you have them. Make them clear and meaningful. Harris notes your curve probably will not be smooth, and that is fine.
5. More metrics. Add supporting metrics if you have them. Revenue is best.
6. Insight. Explain what makes the company special and why it works. This may take more than one slide.
7. Business model. Lay out how you make money. You may not know every detail, but you should know most.
8. Market. Show how large it is and how you will capture it. Convince the investor of the return.
9. Team. Explain why the founders are suited to this problem. Harris is direct that advisors do not matter here.
10. The ask. State how much you are raising and what it buys. Showing where you will be in a year, ideally ready for a Series A, is powerful.
The n is 3 or less rule
Harris treats each section after the title as a set. One slide per section is ideal. If you need more, keep it to three or fewer. A seed deck that runs past this usually has an unclear story.
Design for legibility
Harris's template is intentionally plain. He points to Kevin Hale's YC guide on deck design for principles. The practical standard: one idea per slide, large type, simple charts and nothing the investor has to squint at.
Founder takeaways
- Write the one-liner first. If you cannot say what you do in one sentence, the deck will not fix it.
- Lead with traction if you have it. Move it ahead of the insight slide when the numbers are strong.
- Tie the ask to a milestone. Name the metric you will hit with this money.
- Cut advisor logos. Use the space for founder accomplishments.
- Test the story aloud. Pitch it to someone outside your industry and ask them to repeat it back.
PacTech's Pitch and Investor Readiness module runs founders through this template with live investor feedback.
Sources
- How to build your seed round pitch deck
Y Combinator (Aaron Harris) · 2018 - How to Design a Better Pitch Deck
Y Combinator (Kevin Hale) - Venture Capital Q2 2026
CVCA Intelligence · Aug 4, 2026
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