How to design a pitch deck that doesn't look AI-generated

A 90-minute workflow for a 10-slide deck that closes meetings instead of ending them. Three tools, real numbers, and the specific design moves investors notice.

Most AI-generated pitch decks look exactly like AI-generated pitch decks: same fonts, same gradient hero slides, same generic stock-style imagery, same boring "Problem / Solution / Market / Team" structure. Investors see 50 of these a week and tune them out by slide 2.

The decks that close meetings have specific signatures: custom imagery, sharp narrative, real numbers, and a visual identity you can pick out from across the room. AI helps you get there faster, but only if you direct it instead of letting it default.

This is the 90-minute workflow for a 10-slide deck that closes meetings.

The three-tool stack

You don't need Figma. You don't need a designer. You do need to know your numbers and have a clear point of view on why this is the right business now.

• Gamma as the deck builder. The 2026 version is genuinely the fastest way to iterate on slide design.
• Midjourney for custom cover and section imagery. Reuse one style reference across all slides.
• Claude for compressing your narrative and writing slide copy that doesn't sound like everyone else's deck.

Why this matters

A pitch deck has three jobs:

If your deck looks like every other AI-generated deck, it fails on all three. Custom design and sharp narrative are the bar.

• Get a meeting. This is what the deck does when sent cold or via warm intro.
• Anchor the meeting. It's the visual reference during a 30-minute pitch.
• Get forwarded. A great deck gets shared internally at the firm. A bad one dies in the recipient's inbox.

Step 1: Write the 10 slides as text first (30 minutes)

Don't open Gamma yet. Open a doc. Write 10 slide titles and 1-3 lines of content for each. The structure that works for early-stage rounds:

Notice what's missing: no "Competitive Landscape" matrix slide (it's almost always wrong), no "Business Model" slide (your pricing should be on the Solution slide), no "Roadmap" slide (founders who show roadmaps haven't shipped enough).

Write each slide as a single sentence first. If you can't compress the slide to one sentence, you don't understand it well enough yet.

• Cover. Company name. One-line description.
• The shift. What changed in the world that makes this the moment.
• The problem. Specific. Quantified if possible.
• The solution. Your product, in one sentence and one screenshot.
• Why now. What's different from previous attempts at this.
• Traction. Numbers. Real ones. Even small.
• How it works. Product walkthrough in 3 steps.
• The market. Bottom-up sizing, not "$X billion total addressable market."
• The team. Why specifically this team.
• The ask. What you're raising, what you'll do with it, what milestones it gets you to.

Step 2: Sharpen the narrative in Claude (15 minutes)

Open Claude. Paste your 10-slide outline. Prompt:

Sharpen this 10-slide pitch deck narrative. For each slide, give me: (1) a one-line slide headline that's specific and not generic, (2) 2-3 supporting bullets that include concrete numbers or examples wherever possible, (3) one concrete question this slide should answer for the reader. Avoid VC-cliche language ("revolutionary," "disruptive," "10x"). Be direct.

Claude returns a sharpened version. Some slides will be clearly better. Some will lose your voice, restore it. The goal isn't AI-generated copy, it's your point of view, clearly expressed, with the redundancy and waffle removed.

Step 3: Generate cover and section imagery in Midjourney (20 minutes)

Most decks default to either (a) stock photos that scream "I bought this template" or (b) Gamma's default illustrated style that you've now seen 500 times.

Custom imagery is the cheapest design upgrade you can make. Generate:

In Midjourney, generate the cover first. Iterate until you have one you love. Save its --sref code. Use that code on every subsequent image so they all share a visual identity.

Style prompts that work for pitch decks:

• One cover image that captures your business in a single visual metaphor.
• 2-3 section dividers if your deck has natural sections (e.g., before "Traction" and before "The Ask").
• One product imagery slide if you want a beautiful environment shot of how your product is used.
• For B2B tech: "Abstract editorial composition, deep navy and electric teal, geometric forms emerging from light, premium financial publication aesthetic, --ar 16:9 --style raw"
• For consumer: "Warm cinematic photography, golden hour lighting, single human figure interacting with [product hint], muted film palette, --ar 16:9 --style raw"
• For climate / impact: "Hopeful editorial illustration style, organic shapes, sun and water motifs, premium magazine cover quality, --ar 16:9 --style raw"

Step 4: Build the deck in Gamma (15 minutes)

Open Gamma, start a new deck. Paste your sharpened narrative as the prompt. Gamma turns it into a full deck in about 60 seconds.

Now the design moves that matter:

For the Traction slide, build a chart in Gamma's chart tool, not as a pasted screenshot. Live charts re-render cleanly when investors zoom in on shared PDFs. Screenshots get pixelated.

• Pick one of Gamma's "minimal" themes, not the default. The defaults are too colorful and too templated. Minimal themes give you typographic decks that read as serious.
• Replace cover and section divider images with your Midjourney generations.
• Set a single accent color that matches your brand. Use it sparingly, one number per slide, the CTA, headers.
• Use one font for the entire deck. Inter, Söhne, or DM Sans. Resist the urge to "pair" fonts.
• Cut anything that doesn't earn its place. A 10-slide deck with one clear idea per slide beats a 16-slide deck with three ideas per slide.

Step 5: Read it like an investor (10 minutes)

Print the deck (or full-screen it). Read it without your own narration, in 90 seconds total. Note:

Fix the top 3 issues. Don't try to fix everything, diminishing returns set in fast.

• Which slide do you skip past? That slide doesn't earn its space. Cut it or rework it.
• Which number is hardest to verify? Add a footnote citing the source on that slide.
• Where do you have to read the same word twice? That's a typography or hierarchy problem. Make it bigger or contrast it harder.

What this looks like in practice

The first deck takes 3 hours because you're learning the tools and your story. The third deck takes the full 90 minutes. The fifth takes 60, but by that point you're iterating on a story that already works.

Mistakes that kill the deck

• Default Gamma theme. The single biggest tell that a deck was AI-built. Switch to a minimal theme on slide 1.
• No custom imagery. Stock photos and AI-illustration defaults read as low-effort. One Midjourney session per deck is non-negotiable.
• Made-up market size. "$X billion TAM" with no source kills credibility. Always cite your numbers, always do bottom-up sizing.
• Bullet salad on every slide. If a slide has more than 3 bullets, it has more than one idea. Split it or cut bullets.
• Hidden numbers. If you have one impressive number, it should be the largest text on the slide it lives on. Don't bury good news.
• Roadmap slides. They commit you to specifics that change. Cut.

Where to go next

After your first deck closes its first meeting:

The deck is a living document. Update it after every pitch with what landed and what didn't. By month 3, you'll have a deck that has been pressure-tested by 30 conversations. That's the one that closes the round.

Make the 10-slide version this weekend. Send it to one friendly investor for feedback. Iterate. Then send it cold.

• A short version (5 slides, 60 seconds) for cold intros.
• A long version (15 slides, with appendix) for partner meetings.
• A "data room" version with detailed financials, customer cohort analysis, and team backgrounds. This goes out after a partner says "send me more."