Dekked vs Gamma

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: for paid decks, the .pptx file is the product, so there is no web original to translate.

That matters most for charts. In a paid Dekked deck (a native .pptx), 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 October 2026: a Free plan at $0 with 400 one-time credits and up to 10 slides per prompt; Plus at $9 per seat per month billed annually ($12 month to month) with 1,000 credits a month; Pro at $18 ($25); Ultra at $90 ($100). No plan is unlimited. The “Made by Gamma” badge on exports comes off from Plus.

Dekked’s pricing: from $1.99 per deck, paid per deck, with no subscription required; Standard ($11.99) and Premium ($19.99) are optional monthly plans. 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 · gamma.app/pricing

Renewal, refunds, and what reviewers report

Gamma’s Trustpilot rating is 1.6 out of 5 from 125 reviews as of October 2026, with 74% of reviewers giving one star. In September 2026, three complaints recurred in its 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.

Gamma’s own Help Center confirms the window (as of October 2026): refunds are offered only within the first 3 days of subscribing, for monthly and annual billing alike, only when you contact Customer Support, and only if your credit usage is under the plan’s threshold — fewer than 200 credits on Plus, fewer than 600 on Pro. After 3 days there are no refunds, except where the law requires them.

Three caveats in Gamma’s favor: review platforms over-represent unhappy customers everywhere; 125 reviews is a small sample; and Gamma’s Trustpilot profile is unclaimed — Trustpilot notes the company has not invited reviews, so they may not be representative. Read the reviews yourself rather than taking our summary — the source is linked below.

Dekked’s pay-per-deck purchases never renew, so the category mostly does not apply to them. The optional monthly plans renew until you cancel, which takes a few clicks in your dashboard, and any purchase can be refunded within 7 days.

Sources: Gamma reviews on Trustpilot (125 reviews, as of October 2026) · Gamma Help Center, “What is Gamma’s refund policy?” (October 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 uploaded files from its processing server within about 30 minutes; a private copy of each uploaded PDF is kept for up to 7 days so a failed or poor-quality generation can be investigated, then deleted automatically. Generated files are cleared from its processing server within about 2 hours, and on plans with presentation history the finished deck stays downloadable for the plan’s window (24 hours on Standard, 30 days on Credit Pack and Premium). Your documents are inputs to your deck, not training data.

Sources: Gamma Help Center, “Does Gamma use my content to train its AI features?”

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 more free room to experiment. Gamma’s Free plan is $0 with 400 one-time credits and up to 10 slides per prompt. Dekked’s free offer is a single watermarked first deck.

Frequently asked questions