Short answer: they do different jobs, and many teams will use both. think-cell is the reference for building charts in PowerPoint and now offers AI tiers. Whyston writes the deck: the storyline, the action titles and the exhibits from your documents, with every number labelled by origin. You can keep refining a Whyston deck with think-cell.
Disclosure: Whyston publishes this page. Facts about think-cell come from think-cell's own website and documentation (linked below), reviewed in October 2026.
Side by side
| Whyston | think-cell | |
|---|---|---|
| Built for | Consulting-grade decks you can defend | "The leading PowerPoint productivity tool" |
| Storyline | Governing thought, SCQA arc and MECE pillars written before any slide | Generates an outline you approve (AI tiers); no consulting storyline described |
| Slide titles | An action title on every slide | Not described |
| Numbers | Every number labelled as documented, derived or an assumption; source line on each slide; Figures and Assumptions page | Numbers not labelled by origin |
| Your sources | PDF, PPTX, DOCX, XLSX, CSV and Markdown become a citable evidence base | Data from the web, documents and your own specs (AI tiers) |
| Consulting charts | Native waterfalls, Gantt roadmaps, funnels, market-size rings, with growth arrows and callouts | More than 40 chart types, including waterfall, Mekko and Gantt |
| PowerPoint | Native, editable PPTX; full web editor (every shape and text editable, one-click smart layouts); PowerPoint add-in on Microsoft AppSource | Inside PowerPoint (add-in) |
| Price | Free (3 decks); Pro €29/month or €288/year for 20 decks a month | Annual licence per user, tiers Essentials to AI Suite Plus; price on request |
Where Whyston pulls ahead
- The whole deck, not the chart. Whyston writes the governing thought, the SCQA arc and an action title on every slide.
- Numbers a partner can check. Every figure labelled documented, derived or assumption, with a Figures and Assumptions page.
- Evidence from your data room. PDFs, decks, spreadsheets and notes become a citable evidence base.
- A full slide editor and a PowerPoint add-in. Edit every shape and text freely, change a slide's look and feel in one click with smart layouts, and export native, editable PowerPoint.
When think-cell may be enough
- You have written the storyline and only need to build charts fast.
- Your firm already standardises on think-cell for every exhibit.
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.
See all 25 tools compared: the best AI tools for consulting decks.