Gamma vs Claude vs Genspark vs Decky: The Honest 2026 AI Presentation Tool Comparison

The AI presentation category has quietly split into four very different bets in the last twelve months. Gamma keeps riding the "webpage that looks like a deck" thesis. Claude has become a surprisingly good deck-builder inside its design/artifact mode. Genspark bundles slide generation into a general-purpose AI agent. And Decky, which is what we make, is the only one in the group built specifically for enterprise teams that live inside Google Slides and PowerPoint.

If you're evaluating any of these, the marketing pages will not help you. Every tool claims "generate a beautiful presentation from a prompt." That's true and useless. What actually matters is how each one handles the ugly parts: brand systems, real data, existing decks, distribution, and what happens the second week you use it.

Here's what we've learned from talking to buyers across all four, plus building our own product against them for the last two years.

TL;DR: Which One Is Right for You

• Gamma — best for solo creators, coaches, and marketers building web-first, scrollable "docks" that don't need to be sent as .pptx.
• Claude — best for one-off, quick decks by people who already live in Claude and want a fast, no-new-subscription artifact.
• Genspark — best for research-heavy decks where the AI needs to pull live web data and structure it into slides.
• Decky — best for enterprise teams that need every deck on brand, in Google Slides or PowerPoint, generated from their own library and assets, with visibility for leadership.

Now the details.

Quick Comparison

Gamma

The bet: Presentations should be responsive web pages first, and .pptx should be an afterthought. Gamma pioneered the "generate from a prompt" pattern that everyone else copied, and their editor is genuinely delightful for building web-native scrolling stories.

Where it's strong:

• Fastest zero-to-first-draft of any tool in the category.
• The output looks modern out of the box — cards, gradients, animations, embedded video.
• Great for landing-page-style content: pitch pages, one-pagers, personal portfolios.

Where it falls apart at enterprise scale:

• Every Gamma deck looks like a Gamma deck. The homogenous aesthetic is the biggest complaint we hear from brand teams evaluating it.
• Export to PowerPoint or Google Slides is technically supported but produces flattened, lossy files. Editing the export in .pptx is painful; you're expected to live in Gamma.
• No concept of a governed slide library — every generation starts from a blank prompt, so ten reps produce ten different-looking versions of the same story.
• No leadership visibility into what's being generated across a team.

Buy it if: You're one person or a small team that will live inside Gamma and never needs a .pptx that a client can edit natively.

Claude (Design / Artifact Mode)

The bet: LLMs are already good enough at layout and copy that a general-purpose model with a canvas can produce a passable deck in an artifact. No dedicated presentation product needed.

Where it's strong:

• If you're already paying for Claude, the marginal cost of a deck is zero.
• Genuinely impressive text quality — Claude writes better slide copy than any of the purpose-built tools.
• Great for one-off internal decks: a research summary, a project kickoff, a hackathon pitch.

Where it falls apart at enterprise scale:

• Claude builds presentations without images. In our testing, it will match your brand colors and even drop in your logo, but it does not use any of the graphics, illustrations, photography, or backgrounds that are part of your actual brand system. Every slide ends up as text, numbers, and a color accent — the distinctive visual personality of the brand is gone.
• Zero brand infrastructure beyond color-matching. Fonts are approximate, and anything more expressive than a logo has to be re-uploaded and re-prompted every time.
• No persistence. Every conversation is a blank slate. There's no library of your team's approved slides for Claude to compose from.
• No native .pptx or Google Slides export. You get an HTML artifact you have to translate back into your actual presentation tool.
• No usage tracking, permissions, or admin controls — it's a chat product, not a platform.

Buy it if: You need a fast deck for internal use and you're already deep in Claude.

Genspark

The bet: A general-purpose AI agent that can browse, research, and produce slides as one of many output formats. Under the hood, Genspark's slide generation runs on Claude, but with its own system prompts and orchestration layered on top — so outputs feel related to Claude's design mode, just less generic.

Where it's strong:

• Best-in-class for research-driven decks. Give it a topic and it will pull live web data, structure it, and populate slides with real information.
• Solid for competitor analysis, market briefs, and any "make me a deck about X" task where X changes daily.
• Because it's Claude with better prompting, layouts have a bit more variety and personality than raw Claude artifacts — less of the "every slide is the same editorial template" feel.
• Agent-oriented workflow feels different — you're delegating a task, not editing slides.

Where it falls apart at enterprise scale:

• Slides are a feature, not a product. Editing, brand customization, and export controls are noticeably less mature than Gamma or Decky.
• Inherits Claude's image problem. Because the underlying model is the same, Genspark will match your colors and drop in a logo, but it won't pull in your real brand illustrations, photography, or background assets. The outputs look more polished than Claude's, but they're still visually generic compared to what a designer on your team would produce.
• Same brand approximation problem as Claude — colors and fonts are prompted, not enforced from a real brand system.
• No governed library of your team's existing content, so the AI has no idea what your best slides already look like.
• Enterprise controls are minimal. Fine for one person; not fine for a 200-person sales org.

Buy it if: You need decks whose content changes with the news, and you're okay with output that looks a step above Claude but still nothing like your real brand.

Decky

The bet: Fortune 500s will not switch off Google Slides and PowerPoint. So the AI has to meet them there, respect the brand systems they've already built, and be governable by the people responsible for what customers see. We covered this in depth in why Fortune 500s aren't switching to HTML slide editors.

Where it's strong:

• Native Google Slides and PowerPoint output. Not an export. Not a lossy translation. Real, editable .pptx and Slides files built on your master templates.
• A governed slide library. Every generation composes from your team's actual approved slides, so the output looks like your design team made it — because they did, once.
• Real brand governance. Locked master templates, brand tokens, image treatments, and admin visibility into what's being generated across the org. See our writeup on presentation management as a brand governance problem.
• Real data integration. Salesforce, CSV, product database, MCP — outcome and usage slides populate automatically instead of being hand-typed.

Where it's not the right fit:

• Solo creators writing marketing landing pages. Use Gamma.
• One-off internal decks with no brand requirements. Use Claude.
• Ad-hoc research briefs. Use Genspark.
• Anyone who wants a scrollable web page instead of a slide deck.

Buy it if: You have a real brand system, more than a handful of people building customer-facing decks, and leadership that wants visibility into what's being sent out.

How to Actually Choose

Skip the feature comparison. Answer three questions:

1. Do the decks you build need to be sent as .pptx or Google Slides files that someone else will edit? If yes, Gamma and Claude are out — the export path is lossy in both. Genspark is workable; Decky is native.

1. Do you have a real brand system with locked templates and approved assets? If yes, Gamma, Claude, and Genspark will all drift over time. Only Decky enforces it.

1. Does anyone need visibility into what's being generated across a team? If yes, only Decky has admin controls, usage tracking, and version governance. The others are all single-user products regardless of how many seats you buy.

If the answer to all three is no, pick whichever of Gamma, Claude, or Genspark fits your workflow best — they're all good products for their intended use case. If the answer to any of them is yes, we'd love to show you a demo.

Related Reading

• Why Fortune 500s won't switch to HTML slide editors
• Gamma vs Google Slides in 2026: an honest comparison
• Presentation management is a brand governance problem
• Matik vs Decky: which AI deck tool wins?

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