Dekked vs Gamma
Gamma is a subscription-based AI tool that builds web-native presentations, with PowerPoint available as an export. Dekked is a pay-per-deck AI generator that writes native, editable .pptx files directly — charts open in Excel via PowerPoint’s Edit Data. Gamma’s plans run from Free at $0 to Ultra at $90, with Plus at $9 per seat per month billed annually; Dekked starts at $1.99 per deck with no subscription, and your first deck is free (watermarked).
Updated: September 2026 · Every competitor claim on this page was independently verified in September 2026 or it is not on this page. Sources: gamma.app and Trustpilot.
Dekked vs Gamma at a glance
| Gamma | Dekked | |
|---|---|---|
| What happens to your file | The deck is a web-native artifact; PowerPoint is an export of that artifact. | Native .pptx is the output itself — charts are real PowerPoint objects: double-click one, choose Edit Data, and the numbers open in Excel. Figures and tables are extracted from the source PDFs you upload. |
| Pricing model | Subscription: Free $0 (400 credits, decks up to 10 slides) · Plus $9/seat/mo billed annually · Pro $18 · Ultra $90. Watermark removal starts at Plus. | Pay per deck, from $1.99. No subscription. First deck free, with a watermark. |
| Renewal & refunds | 3-day refund window, including annual plans. Auto-renewal without a reminder is a recurring complaint in its 92 Trustpilot reviews (as of September 2026). | Nothing renews — you pay when you generate a deck. |
| Data handling | Gamma’s own FAQ: content on free and individual plans trains AI by default; opt-out available in settings. | Uploads are deleted after processing — source files within about 30 minutes, generated files within about 2 hours. |
| Trust (Trustpilot) | 1.7/5 from 92 reviews, 73% one-star — as of September 2026. | Too new for a meaningful review base — judge the watermarked free first deck instead of any claim on this page. |
Sources: gamma.app · Trustpilot: Gamma reviews
What happens to your file
The structural difference between the two products is where the presentation actually lives. Gamma builds a web-native artifact — the deck you edit and share is a web document, and PowerPoint is an export of it. Dekked works in the opposite direction: the .pptx file is the product, so there is no web original to translate.
That matters most for charts. In a Dekked deck, a bar chart is a native PowerPoint chart object: double-click it, choose Edit Data, and the underlying sheet opens in Excel to change numbers, add a series, or restyle it. Dekked also extracts the figures and tables out of the source PDFs you upload, so the deck starts from your document’s numbers rather than from a prompt.
If your deck’s final destination is a browser tab rather than a .pptx handoff, Gamma’s model is the right one — see the candor section below.
Pricing: subscription versus pay-per-deck
Gamma’s pricing as of September 2026: a Free plan at $0 with 400 credits and decks capped at 10 slides; Plus at $9 per seat per month billed annually; Pro at $18; Ultra at $90. Watermark removal starts at Plus.
Dekked’s pricing: from $1.99 per deck, paid per deck, no subscription. The first deck is free and carries a watermark.
The arithmetic is simple. Plus billed annually is $108 per seat per year; at $1.99 per deck, $108 buys roughly 54 decks. Generate daily and a subscription can be the better deal; generate in bursts a few times a month and pay-per-deck usually is.
Sources: gamma.app
Renewal, refunds, and what reviewers report
Gamma’s Trustpilot rating is 1.7 out of 5 from 92 reviews as of September 2026, with 73% of reviewers giving one star. Three complaints recur across those reviews: subscriptions auto-renewing without a reminder, a 3-day refund window that applies even to annual plans, and support handled by AI rather than a person.
Two caveats in Gamma’s favor: review platforms over-represent unhappy customers everywhere, and 92 reviews is a small sample. Read the reviews yourself rather than taking our summary — the source is linked below.
Dekked has no subscription to renew, so the category mostly does not apply: you pay when you generate, and nothing recurs.
Sources: Gamma reviews on Trustpilot (92 reviews, as of September 2026) · Dekked refund policy
Data handling: training defaults versus deletion
Gamma’s own FAQ states that content from free and individual plans is used to train AI by default, with an opt-out available in settings. That is a legitimate design choice — but it is a default you have to know about to turn off, and it matters if your decks contain client material or unpublished work.
Dekked deletes uploads after processing: source files within about 30 minutes, generated files within about 2 hours. Your documents are inputs to your deck, not training data.
When Gamma is the honestly better pick
A comparison that always concludes “buy ours” is an ad. Real cases where Gamma is the right choice:
- Your presentation lives in the browser. Gamma’s decks are web-native documents presented in-browser. If you share a link instead of handing off a file, that is Gamma’s home turf, not ours.
- You want breadth beyond slide decks. Gamma is not only a deck tool. If you want one tool that covers more formats than presentations, Dekked does not compete there.
- You want an ongoing $0 tier. Gamma’s Free plan is $0 with 400 credits and decks up to 10 slides. Dekked’s free offer is a single watermarked first deck, not an ongoing free tier.
Frequently asked questions
Is Dekked cheaper than Gamma?
It depends on volume. Gamma Plus is $9 per seat per month billed annually ($108 a year); Dekked is $1.99 per deck with no subscription. Above roughly 4–5 decks a month, a subscription can win; below it, pay-per-deck usually costs less. Gamma also has a $0 free plan (400 credits, decks up to 10 slides), and Dekked’s first deck is free with a watermark.
Does Gamma export to PowerPoint?
Yes — Gamma builds a web-native presentation and offers PPTX as an export of that artifact. Dekked generates the .pptx natively instead: charts are real PowerPoint chart objects whose data opens in Excel via Edit Data, and figures and tables are extracted from the PDFs you upload.
What is Gamma’s Trustpilot rating?
As of September 2026: 1.7 out of 5 from 92 reviews, with 73% one-star ratings. The recurring complaints are auto-renewal without a reminder, a 3-day refund window that includes annual plans, and AI-only support. Note that 92 reviews is a small sample and review sites skew negative — read the source before weighing it.
Does Gamma train AI on my content?
Gamma’s FAQ states that content from free and individual plans is used for AI training by default, with an opt-out in settings. Dekked deletes uploaded files after processing — source files within about 30 minutes, generated files within about 2 hours — and does not use your documents for training.
Can I try both for free?
Yes. Gamma’s Free plan is $0 with 400 credits and decks up to 10 slides; watermark removal starts at the Plus plan. Dekked’s first deck is free and watermarked — generate it without a subscription and open the .pptx in PowerPoint before paying anything.
The cheapest way to settle it is a real deck.
Your first Dekked deck is free (watermarked). Upload a PDF, open the .pptx in PowerPoint, and double-click a chart — no subscription required.
Generate your first deck freeKeep comparing
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- AI presentation tools in 2026: the tested report — full data in the 2026 report — export fidelity, billing terms, and the AI-accessibility audit.
- The best Gamma alternative for editable PowerPoint — the workflow-level look at where a web-first export loses editability.
- AI presentation makers without a subscription — the pay-per-deck model, explained.