Both make slides with AI. The difference is where they start: Gamma starts from a prompt or pasted content, Presmo starts from your document — a PDF, text or a URL — and turns it into a designed, editable .pptx without inventing anything.
Upload a PDF, paste text, or drop a URL.
It understands structure, tightens the text, and picks each layout.
Review every slide, then export an editable PowerPoint.
Presmo reads the whole document — headings, tables, scanned pages — and designs the deck from it.
Every number and claim on a Presmo slide comes from your source. Nothing is made up.
Download a real PowerPoint and finish it in PowerPoint, Keynote or Google Slides.
| Presmo | Gamma | |
|---|---|---|
| Starts from | Your document: a PDF, pasted text or a URL | A prompt, pasted text or an imported file |
| What you get | An editable .pptx file you own, plus an in-app editor | A web-native presentation in Gamma's own format, exportable to PowerPoint or PDF |
| Faithful to your source | Yes — Presmo never invents facts that are not in the document | Generative: it can add content beyond what you gave it |
| Long documents | Reads whole reports: layout-aware extraction, tables, OCR for scanned pages | Built around prompts and pasted text |
| Editing | Built-in slide editor, 16+ output languages, themes; then any PowerPoint-compatible app | Gamma's online editor |
| Pricing | Free first deck · $7 for 5 decks, one-time · Pro $12/mo | Subscription tiers — see Gamma's pricing page |
| Best for | Turning an existing report, paper or proposal into a deck | Creating new presentations, documents and web pages from a prompt |
Written from each product's public positioning in October 2026. Features and prices change — check the vendor's site. Presmo is not affiliated with Gamma.
You are starting from an idea rather than a document, you want the result to live on the web and be shared as a link, or you also make documents and web pages in the same tool. Gamma's generated layouts are polished and its editor is pleasant to work in.
You already have the content — a 40-page report, a research paper, a client proposal — and the job is to get it into a deck without losing or inventing anything.
Presmo is built for one job: a document goes in, a deck you would actually present comes out. It reads the structure of the document (sections, tables, figures), tightens the prose into slide-sized points, picks a layout per slide, and refuses to add facts that are not in the source. The result is a real .pptx — your file, editable anywhere.
See the full Presmo pricing or the Gamma alternative page for more detail.
For turning an existing document into a presentation, yes. For creating new content from a prompt, Gamma is designed for that and Presmo is not — Presmo deliberately stays within your source.
Yes. Every deck downloads as a real, editable .pptx that opens in PowerPoint, Keynote or Google Slides.
Gamma lets you paste or import existing content and generates from it. Presmo is built only for that case, so it reads long documents in full and keeps every figure where it belongs.
Your first deck is free, full-length and watermark-free. After that you get 3 preview decks a month free, a $7 one-time pack of 5 decks, or Pro at $12/mo for 60 decks.