How to Build a Pre-Seed Pitch Deck: A Founder's Guide

A pre-seed pitch deck has one job: to get you the next conversation. Nobody invests at pre-seed off a deck alone, but an investor reading dozens of decks a week will decide fairly quickly whether yours is worth a call. A deck that's hard to follow rarely gets one, however good the business behind it.

I read every application that comes into Solid Bond, and most of the feedback I give founders on their decks comes back to the same handful of points. This guide covers what a pre-seed deck is for, how long it should be, what to include slide by slide, what investors look for in the sections that matter most, and the mistakes that most often hold a deck back.

What a pre-seed pitch deck is for.

At pre-seed, most businesses have limited proof that the model works. There might be an MVP, a few pilots or some early revenue, but rarely enough data to carry the case on its own. That changes what the deck needs to do compared with a seed or Series A deck.

A later-stage deck leans on metrics. A pre-seed deck leans on four things: a problem worth solving, a team with a credible reason to be the ones solving it, early signs that customers want it, and a clear plan for what this round proves. If an investor finishes your deck understanding those four things, it has done its job.

It's also worth remembering what the deck isn't for. It doesn't need to answer every question; it needs to make an investor want to ask them.

How long should a pre-seed pitch deck be?

We usually recommend 12 to 15 slides. That's short enough to stay readable for investors who are sifting through a lot of decks every week, but long enough to give proper detail on the core proposition and the areas investors will look at closely.

If a deck runs much longer, it's usually because sections that need one slide have been given three, often the problem, the go-to-market plan or the team. Anything genuinely useful that doesn't fit can go in an appendix.

It also helps to have more than one version. A deck an investor reads on their own needs more context than one you present on a call, and a short one-pager is useful for introductions. Start from the full version and cut down, keeping the numbers and the core story the same across all of them.

Start with one line that says what the business does.

The most common problem I see is also the simplest to fix. Some decks make it genuinely hard to work out what the business does. The first few slides talk about the vision, the market or a broad problem, and the reader is left guessing until slide five.

Your opening slide should carry one plain line that tells an investor what you do, for whom, and ideally how. Something like "Software that automates VAT reconciliation for UK accountancy firms" tells the reader more in ten words than "Reimagining the future of finance" does in a full slide.

Once an investor understands broadly what you do from the start, every slide after it makes more sense. Without it, they're reading the rest of the deck trying to piece it together.

Pre-seed pitch deck template: what to include.

There's no single correct order, but this structure covers what most investors will expect to see at pre-seed, in an order that tells the story logically.

1. Title and one-line descriptor. Company name and the plain sentence on what you do.
2. Problem. Who has the problem, how painful or costly it is, and how they deal with it today. One slide is usually enough.
3. Solution. How you solve it, and why your approach is better than the current way of doing things.
4. Product. What it actually looks like and where it's at now: idea, MVP, in pilot or live.
5. Traction and customer interest. Pilots, paying customers, LOIs, usage, testimonials and what you've learned from them.
6. Market sizing. TAM, SAM and SOM, built from the bottom up and tied to your revenue model.
7. Competitive landscape. Who else solves this problem, including the workaround customers use today, and why you win.
8. Business model. How you make money, what you charge and who pays.
9. Go-to-market. Your target customer, the channels you'll use to reach them and how you'll convert early interest into contracts.
10. Team. The founders, their relevant expertise and why they're the right people to build this.
11. Financials. An 18 to 24 month plan covering runway, burn and the milestones the round gets you to.
12. The ask and use of funds. How much you're raising, on what terms, and what the money delivers.

Advisors and board members can sit on the team slide or a short slide of their own. Keep them brief; investors are mainly backing the founders.

What investors look for in each section.

Some slides get read more closely than others at pre-seed. These are the ones where I see the biggest gap between strong and weak decks.

Team

At pre-seed, the team slide often does more work than any other. Most businesses at this stage have little execution proof simply because they're so early, so investors are making a judgement on whether this group of people can build it.

Focus on relevant expertise rather than a list of previous employers. What do the founders know about this industry and this customer that most people don't? Domain expertise tends to come with a network and credibility that help land the first customers and partners, which matters a lot early on.

It also helps to show how the team fits together. Founders with different but complementary expertise, for example one who knows the industry and one who can build the product, give an investor more confidence than a team with overlapping skills and an obvious gap.

Market sizing

Market sizing is one of the most common reasons a deck doesn't progress with us. The usual issue is a market that stays too high level: a large TAM figure for a whole industry, with no clear link to the business actually being pitched.

TAM, SAM and SOM are all useful to include, but SAM and SOM should be tied to your revenue model and to the parts of the market you can genuinely reach. Work it out from the bottom up: how many customers fit your target profile, what each one pays you, and what share you can realistically win.

Doing that maths honestly matters. If your serviceable market is 30,000 businesses paying £2,000 a year, that's a £60m market, and even winning 15% of it gets you to around £9m of revenue. That might be a good business, but an investor will ask whether it can produce a venture-scale outcome. If you see the starting niche as a wedge into something bigger, show the route, but expect investors to judge the business on the market your plan actually models today.

At pre-seed, it's also worth showing your initial wedge: who the first 50 to 100 customers are and why they'll buy first.

Traction and customer interest

Investors at this stage are looking for validation beyond the founder's own conviction. That means pilots, paid commitments, LOIs, design partners or real usage of an MVP.

The type of evidence matters. A letter of support or a logo under NDA could mean anything. A paid pilot, a named design partner or a testimonial explaining what your product changed for a customer carries far more weight. If early feedback has already led to changes in the product, say so, as it shows you're listening to customers and acting on what they tell you.

Go-to-market

The go-to-market slide should be a strategic overview, not a full sales playbook. I'd keep it to three or four areas: your target customer profile, the main channels (direct outbound, partnerships and so on), how pilots are structured, and how they convert into contracts. Acquisition costs are worth including where you have a credible view on them.

What it shouldn't be is a capacity plan or a revenue ramp. A slide showing how fast you can scale production or sales doesn't tell an investor who buys, through which channel, or how long the sales cycle takes.

Financials

Five-year revenue and EBITDA projections belong in a seed or Series A deck. At pre-seed, an 18 to 24 month plan is far more useful. It should show your runway from this round, monthly burn, the key assumptions behind your numbers, and the milestones you expect to hit along the way.

One slide is usually enough. Investors at this stage are mainly looking at technical feasibility, early adoption and how efficiently you'll use the capital. Make sure the numbers in the deck match your financial model exactly, as inconsistencies will come up in diligence.

The ask and use of funds

A breakdown of where the money goes (product, team, marketing) is useful, but it's much stronger when tied to milestones. "This round funds MVP completion, five pilot customers and three converting to paid contracts within 12 months" tells an investor what they're buying into. A pie chart on its own doesn't.

Include the round size, the instrument (equity or an ASA, for example), who's already committed and the runway it gives you. As a rule of thumb, aim for at least 12 months of runway at pre-seed. Much less and you'll be fundraising again almost as soon as you close.

Common pitch deck mistakes.

Beyond the individual slides, a few patterns come up again and again.

It reads like a product description. A lot of decks end up as a series of product slides: features, screenshots and how it works. Investors are backing a business, so the deck needs to cover the market, the model, the plan and the team as well.

Everything is framed as already achieved. Words like "proven", "established" and "validated" are easy to write, but if the evidence on the page doesn't back them up, they undermine trust. It's more credible to show what you've proven so far, what's still open, and how this round closes the gap. That's also easier for an investor to back.

Big numbers with no grounding. Market sizes, revenue jumps or growth rates that aren't tied to realistic assumptions make a reader question everything else. If revenue goes from £1m to £20m in a year, the slide needs to show how.

Slogans and AI-written copy. AI tools have made it much easier to build a good-looking deck, and that's a positive. The downside is decks full of slogan-style lines that sound impressive and say very little, the "we didn't build a product, we built a movement" type. Investors read past them, and they make it harder to see what's genuinely different about the business. Read your deck back before sending it and take them out. There's still real skill in reducing a complex business down to simple, clear statements that tell a good story, and it's obvious when a founder has done that thinking themselves.

Pitch deck examples: weak versus strong.

We can't share founders' decks, but here's how the difference tends to look on three of the slides that matter most. These are illustrations rather than real companies.

Before you send it.

Check that the numbers match across the deck, the model and anything else you've shared. Keep track of which version went to which investor. And read it once more as someone who has never heard of your business: if the first slide doesn't tell them what you do, fix that before anything else.

Once your deck is ready, the next step is getting it in front of the right investors, ideally through an introduction. Our guide on how to get a warm introduction to an investor covers who to ask and how. It's also worth having a fundraising data room ready for when investors want to go deeper.

If you're building a UK B2B tech or tech-enabled business and raising pre-seed, we'd like to see your deck. You can check our investment criteria, then apply to Solid Bond.