What is the difference between Whyston and Perceptis?

Both build consulting-style decks with a storyline, sources and PowerPoint output. Whyston additionally labels every number as documented, derived or an assumption and lists all assumptions at the end of the deck. Pricing also differs: Whyston Pro is €29 a month for 20 decks; Perceptis plans are metered by slides per month.

Whyston vs Perceptis: Which AI Tool for Consulting Decks?

Short answer: both are serious consulting tools, and both build a storyline with sources. Choose Whyston when your decks rely on estimates, forecasts and synergies: Whyston labels every number as documented, derived or an assumption and lists every assumption at the end, so a partner sees immediately which figures are judgement calls. Whyston's Pro plan also includes 20 full decks a month.

Disclosure: Whyston publishes this page. Facts about Perceptis come from Perceptis's own website and documentation (linked below), reviewed in October 2026.

Side by side

	Whyston	Perceptis
Built for	Consulting-grade decks you can defend	"Structured, board-ready" executive decks
Storyline	Governing thought, SCQA arc and MECE pillars written before any slide	Consulting storyline built on situation, complication, resolution
Slide titles	An action title on every slide	Yes
Numbers	Every number labelled as documented, derived or an assumption; source line on each slide; Figures and Assumptions page	Automatic citations on every factual statement; numbers not labelled by origin
Your sources	PDF, PPTX, DOCX, XLSX, CSV and Markdown become a citable evidence base	Prompt and uploaded material
Consulting charts	Native waterfalls, Gantt roadmaps, funnels, market-size rings, with growth arrows and callouts	Yes
PowerPoint	Native, editable PPTX; full web editor (every shape and text editable, one-click smart layouts); PowerPoint add-in on Microsoft AppSource	PowerPoint-native export and a PowerPoint add-in; no slide editor, changes are requested from the AI
Price	Free (3 decks); Pro €29/month or €288/year for 20 decks a month	Free (10 slides/month); Starter $29 (50 slides); Pro $129 (100 slides) a month

Where Whyston pulls ahead

Assumptions made visible. Citations work only when a source exists. Market sizes, synergies and forecasts have none. Whyston labels them as assumptions and lists them on a Figures and Assumptions page.
Whole decks on a flat plan. Pro covers 20 decks a month at €29; Perceptis plans are metered in slides.
A full slide editor, plus a PowerPoint add-in. Edit every shape and text freely; smart layouts change a slide's look and feel in one click.
Spreadsheets as evidence. XLSX and CSV are read into the evidence base.

Commercial due diligence sample deck. The title gives the answer, the table proves it question by question, the bar says what to do, and the source line shows where each number came from.

When Perceptis may be enough

Your decks rely only on facts with a clear published source.

Choose Whyston if

The deck comes from a data room, a financial model, research or interview notes.
A partner, a board or an investment committee will ask where each number came from.
You need the storyline and the action titles written, not only the slides.
The team will keep working in PowerPoint after the first draft.

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Product and company names are trademarks of their respective owners and are used only to identify their products. Whyston is not affiliated with, endorsed by or sponsored by any of them. Facts about other products come from their public websites and documentation on the dates stated; prices and features change, so check the vendor before you buy.