4 AI Redesign Tools Tested on One PowerPoint

Short answer

Strongest all-rounder for speed and editing: Gamma — about 5–6 minutes, a generated cover image, consulting-style headlines, and every word editable in its built-in editor. It also rewrites headlines and adds its own summary lines, so check the text.
Most designed result: BetterPPT — every slide gets its own layout, your photos are re-composed and new imagery is added. It's the most expensive ($39 per deck up to 30 slides), the slowest, and has no in-browser editor.
Cheapest per deck: Wonderslide — $4.99 and a few minutes, with bold AI illustrations. In its “Improve and refine” mode it dropped most of the numbers on our data-heavy slides.
Most conservative: Plus AI — keeps the text as written and exports a native PowerPoint, but the slides stay close to a standard template.

How we tested

The source deck is an 8-slide corporate introduction for a sample company: title slide, contents, about us, technology, manufacturing, products, case studies and roadmap. Most slides are plain bullet points; 7 photos appear on 3 slides. On October 18, 2026 we uploaded the same .pptx to each tool and used its guided flow:

The source deck, all export images and the scoring data are on GitHub so you can rerun the test: github.com/michaelkong1018/betterppt-redesign-benchmark

BetterPPT: Uploaded the .pptx, answered the setup questions, downloaded the HD image version.
Gamma: Imported the .pptx into Gamma's redesign agent, answered its setup form and accepted its suggested direction; exported the slides.
Wonderslide: Answered its two questions with “Improve and refine (Recommended)” and “Modern Tech”; downloaded the free PDF (watermarked). We later re-ran it with “Preserve exact structure”.
Plus AI: Asked it to “redesign and make it look better and professional” in the Plus AI editor (Basic plan); exported the PPTX.

Results at a glance

	BetterPPT	Gamma	Wonderslide	Plus AI
Works on your existing deck	Yes — upload a .pptx	Yes — import a .pptx	Yes — PPTX, PDF, DOCX and more	Yes — import into its editor
Layout approach	Each slide designed individually	Template-based, consulting-style blocks	Style preset, card layouts	Template-style layouts, cards
New imagery	Yes, on most slides	Yes — generated cover image	Yes, on some slides	None added in our test
Your original photos	Re-composed, used full-bleed	Placed as-is	Placed as-is in cards	Placed as-is
Text on data-heavy slides	Figures kept and enlarged	Figures kept; headlines rewritten, summary lines added	Mostly dropped in “Improve” mode; kept in “Preserve” mode	Kept as written
Editing	Download the .pptx and edit in PowerPoint; no in-browser editor	Every element editable in its built-in editor	Built-in editor	Built-in editor
File you get	Editable .pptx + HD images	Gamma deck; PPTX / PDF export	Free: watermarked PDF. Paid: editable PPTX + PDF	Native .pptx
See results before paying	Up to 6 pages after a $2.90 refundable deposit	Free plan with one-time credits	Whole deck, watermarked, free	We tested on a paid plan
Time	About 15–20 min for 30 slides	About 5–6 min	About 5–6 min	Not timed
Price	$39 up to 30 slides, $59 for 31–50, one-time	Free plan; paid plans roughly $8–20 per seat/mo	$4.99 per deck; subscriptions $12.99–24.99/mo	Subscriptions from $15/user/mo (Pro $25)

Prices as shown on each product's checkout or pricing page on October 18, 2026. Gamma's pricing page blocked our checker, so its range comes from third-party listings — check gamma.app/pricing.

Slide by slide

Title slide

The original is four lines of text on white. No image.

BetterPPT — full-bleed factory scene, company name as the headline

Gamma — generated factory image with a text block; the tagline became the headline and the company name moved to a small label

Wonderslide — dark solid background, centered text

Plus AI — light panel plus a navy block with the year

Technology & R&D (a data-heavy slide)

Five bullets packed with figures — 11% of revenue, 1,200+ engineers, 800+ patents, 6 R&D centers, 60% faster cycles, 34% fewer defects — plus one lab photo.

BetterPPT — photo used as the backdrop, three key numbers enlarged; title rewritten as a takeaway

Gamma — takeaway headline, two big stats, a “So what” bar; the photo label “Shanghai Lab 02” isn't in the original

Wonderslide (“Improve and refine”) — two cards and two images; most figures removed

Plus AI — white card, original photo, navy stat bar; text as written

Manufacturing system

Five bullets and two photos. This is Wonderslide's strongest slide in our test.

BetterPPT — the two photos become two large panels with the headline numbers on top

Gamma — takeaway headline, four stats under two small photos

Wonderslide — a generated isometric factory with all five points as callouts

Plus AI — two text cards with the photos small underneath

What each tool kept on the data-heavy slide

We checked every fact on the Technology & R&D slide against the original.

Fact in the original	BetterPPT	Gamma	Wonderslide (Improve)	Plus AI
R&D spend = 11% of revenue	Kept	Kept	Dropped	Kept
10%–14% industry benchmark	Folded into the title, number not shown	Kept	Dropped	Kept
1,200+ R&D engineers	Kept	Kept	Dropped	Kept
800+ granted patents	Kept	Kept	Dropped	Kept
6 global R&D centers	Kept	Dropped	Dropped	Kept
Digital twin: R&D cycles up to 60% shorter	Kept	Kept	Kept	Kept
AI inspection: 34% fewer defects	Kept	Kept	Dropped	Kept
Core technology list	Kept	Kept	Kept	Kept
Joint innovation with universities and labs	Kept	Kept	Kept	Kept

Two different risks showed up. Wonderslide's “Improve and refine” mode removed figures — the About Us slide also lost the 18,000+ employees and USD 4.2B revenue — but with “Preserve exact structure” the numbers stayed. Gamma kept almost every figure but added text of its own: a “So what” line on each slide and a photo label (“Global R&D Center · Shanghai Lab 02”) that isn't in the source. BetterPPT offers three modes at setup — keep every word, allow light editing, or allow restructuring; whichever tool you use, re-read the slides before you present.

Which one should you use?

Gamma

Best if you want a strong result fast and plan to keep editing in the browser. The built-in editor is the best of the four. Check every headline and summary line it writes.

BetterPPT

Best for decks that matter — a client pitch, an investor meeting, a board update — where the slides need to look designed rather than templated and your photos need work. It costs more, takes longer, and you edit in PowerPoint, not in the browser.

Wonderslide

Best if budget matters most: $4.99 and a few minutes for a bold, consistent look, and you can see the whole deck (watermarked) before paying. Choose “Preserve exact structure” if your figures must stay.

Plus AI

Best if you want to stay close to the original and keep working in PowerPoint or Google Slides. It's the safest for wording, but the visual change is modest.

More on how BetterPPT and Gamma differ: BetterPPT vs Gamma →

Questions

Which AI tool redesigns an existing PowerPoint without changing the content?

In our test, Plus AI kept the wording as written and BetterPPT kept every figure (and lets you choose “use my text exactly as written”). Gamma kept nearly all figures but rewrote headlines and added its own summary lines. Wonderslide kept the numbers only in its “Preserve exact structure” mode.

Which tools give you an editable PowerPoint file?

BetterPPT includes an editable .pptx with real text boxes. Plus AI exports a native .pptx and Gamma offers PPTX export. Wonderslide's free download is a watermarked PDF; editable PPTX comes with its paid options. Gamma, Wonderslide and Plus AI also let you edit inside their own editors; BetterPPT does not.

What's the cheapest way to redesign one deck?

Wonderslide at $4.99 per deck, or Gamma's free plan if its one-time credits cover your deck. Plus AI is a monthly subscription from $15. BetterPPT is $39 per deck (up to 30 slides) — priced against hiring a designer rather than against other AI tools.

We Redesigned the Same PowerPoint with 4 AI Tools