Founder, SlideGMM AI
Henry Yos
I've been building presentation tooling for 8 years and reviewing pitch decks for early-stage founders for almost as long. Before SlideGMM I worked on internal slide-generation tools at two SaaS startups (one acquired, one still running) and helped portfolio companies at a small accelerator with their fundraise decks. I've personally raised three rounds and reviewed 1,000+ decks across Seed, Series A, and Series B stages. SlideGMM exists because I got tired of fighting Gamma's PowerPoint export and wanted a tool that produced .pptx files VCs could actually edit.
Areas of expertise
- Pitch deck strategy
- Investor fundraising
- AI presentation tooling
- Product design for presentation software
- Multi-language SEO for SaaS
Posts by Henry
How to Turn a YouTube Video Into a Presentation With AI: 3 Methods Tested (2026)
Three methods to convert a YouTube video into slide presentation — from one-click AI tools to manual transcript-based workflows. Tested on the same 20-minute talk; here's what worked and what didn't.
8 min read · how-toTome vs SlideGMM (2026): An Honest Side-by-Side After 6 Months Using Both
A detailed comparison of Tome and SlideGMM across pricing, AI generation quality, PowerPoint export, mobile experience, and team features. Where each wins, where each loses, and how to pick.
8 min read · comparisonWhat Reddit Actually Says About AI Presentation Tools (2026 Analysis of 500+ Comments)
We read 500+ Reddit comments across r/productivity, r/startups, r/marketing, and r/Entrepreneur to find what real users say about Gamma, Tome, Beautiful.ai, and SlideGMM. The praise, the complaints, and the gaps.
9 min read · researchPitch Deck Storytelling Frameworks That Actually Work in 2026 (5 Patterns Tested)
Five storytelling frameworks for pitch decks — Hero's Journey, Problem-Agitate-Solve, Before-After-Bridge, Why-How-What, and the YC Memo. Which actually work for VCs, with examples and how to apply each.
10 min read · how-toHow to Make an Investor Pitch Deck With AI in 2026 (11-Slide Walkthrough)
A step-by-step guide to building a Series A or Seed pitch deck using AI tools. Real prompts, real slide structures, and the 11 slides every VC expects to see.
10 min read · how-toGamma's Free Tier Limits in 2026: What You Actually Get And 4 Workarounds
Gamma's free tier has 400 lifetime AI credits, watermarks, and export restrictions. Here's a breakdown of every limit, when you'll hit them, and four ways to extend or replace the free tier.
8 min read · pain-pointGamma Export to PowerPoint Quality Issues: Why It Happens And 3 Workarounds (2026)
Gamma's .pptx export degrades your deck — animations vanish, fonts substitute, layouts break. Here's exactly what breaks, why, and three real workarounds to ship a clean PowerPoint file.
9 min read · pain-pointGamma AI Review (2026): What It's Great At, Where It Hurts, And Who Should Actually Use It
An honest, hands-on review of Gamma AI after 6 months of daily use. The good (storytelling templates, animations), the bad (PowerPoint export, free-tier limits), and the cases where Gamma genuinely is the best tool.
11 min read · comparisonHow to Turn ChatGPT Output Into PowerPoint Slides: 5 Methods Tested (2026)
Five ways to convert ChatGPT responses into PowerPoint presentations — from one-click AI tools to manual copy-paste workflows. We tested each method on the same prompt and rank them by quality, speed, and effort.
8 min read · how-toThe Best AI Presentation Tools of 2026: Gamma vs Tome vs Beautiful.ai vs SlideGMM (Honest Comparison)
We tested the four leading AI presentation tools head-to-head across 12 real use cases. Detailed scoring on first-draft quality, PowerPoint export, pricing, and team features. The winner depends on what you actually need.
10 min read · comparison20 Free AI Presentation Templates for 2026 (And Where To Find Them)
Twenty genuinely-free AI presentation templates across pitch decks, marketing, sales, and education — with honest notes on quality, licensing, and the catches behind 'free.'
8 min read · listicle15 Pitch Decks From Unicorn Startups — Slide-by-Slide Breakdown (2026)
We pulled together 15 real pitch decks from companies that grew into unicorns — Airbnb, Stripe, Figma, Notion, Slack, Dropbox, Uber, DoorDash, Robinhood, Coinbase, Canva, Loom, Linear, Calm, and Y Combinator's seed memo. Slide-by-slide what they did, what worked, what we'd steal.
14 min read · listicle