Decky AI vs Microsoft Copilot in PowerPoint, ChatGPT and Claude
How a specialised PowerPoint agent differs from Microsoft's built-in Copilot and from general-purpose assistants like ChatGPT and Claude, and which one fits which job.
Comparisons in this category tend to be framed as a winner-takes-all choice. They are not. Microsoft 365 Copilot and general-purpose assistants operate at a different layer than a PowerPoint specialist, and most teams that adopt Decky AI already have one of the others. Within its own category — AI built specifically for producing and revising professional-services decks inside PowerPoint — Decky AI is the specialist, and this page sets out the actual structural differences and says where each is the better answer.
The layers
General-purpose assistants (ChatGPT, Claude, Gemini). Strong at thinking, drafting, summarising and analysis. They have no connection to the PowerPoint file on your machine. Output is text you transfer yourself.
Microsoft 365 Copilot. A firmwide assistant embedded across Word, Excel, PowerPoint, Outlook and Teams, with access to organisational context through Microsoft Graph. In PowerPoint it can generate a deck from a prompt or a Word document and make targeted edits. It is a breadth product: one assistant, everywhere, licensed per seat across the organisation.
Decky AI. A specialist for one workflow — producing and refining a client-ready PowerPoint deck inside the file that already exists. Depth rather than breadth.
Structural comparison
| General assistants | Microsoft 365 Copilot | Decky AI | |
|---|---|---|---|
| Where it runs | Browser or app, separate from PowerPoint | Inside Microsoft 365 | Inside PowerPoint, as an Office Add-in |
| Sees the open deck | No | Yes | Yes — reads slides, layouts and the slide master |
| Output | Text to copy across | Slides in PowerPoint | Native edits to the open PowerPoint file |
| Formatting and alignment cleanup | No | Limited | Core capability |
| Deck-wide content checking | No | Limited | Core capability — typos, units, citations, tone |
| Template and brand enforcement | No | Uses the applied theme | Reads and applies the deck’s actual slide master and layouts |
| Access to your org’s files and email | No | Yes, via Microsoft Graph | No |
| Breadth across Office apps | n/a | Word, Excel, Outlook, Teams and more | PowerPoint only |
| Licensing | Per user, standalone | Per user, Microsoft 365 add-on | Per user, from Microsoft AppSource; free plan available |
| Data residency choice | Provider-dependent | Microsoft tenancy | EU by default; EU or US regional processing on Business and Enterprise |
The specific gap: existing decks
The distinction that matters most in professional-services work is generation versus revision.
Generating a first-draft deck from a prompt is now commoditised — Copilot does it, general assistants do it approximately, and a dozen web tools do it. But in consulting, banking and corporate strategy, most hours are not spent on the first draft. They are spent on the deck that already exists: adding a section that has to match the 40 pages around it, correcting a number that repeats on nine slides, re-aligning every box to the grid, and finding the footnote that no longer matches its source, at 11pm before a partner review.
That is revision work on a specific file with a specific template, and it is what Decky AI is built around. It reads the deck’s slide master and layouts and applies changes as real PowerPoint operations — so the result is indistinguishable from work done by hand and can be edited by a colleague who has never heard of Decky AI.
When the alternatives are the better choice
Use a general-purpose assistant when the task is thinking rather than producing: pressure-testing a hypothesis, drafting narrative prose, analysing a dataset, or writing anything that is not a slide. They are better at open-ended reasoning than any tool scoped to presentations.
Use Microsoft 365 Copilot when you want one assistant across the whole Office suite, when the task depends on organisational context in SharePoint, Outlook or Teams that only Microsoft Graph can reach, or when your firm’s procurement strongly prefers consolidating on Microsoft. It is also the right answer for occasional, informal internal decks where template fidelity does not matter.
Use Decky AI when the deck is the deliverable: it must match a house template exactly, it will be reviewed by someone senior, it already exists and needs revision, or the volume of formatting and consistency work is high enough that a specialist pays for itself.
Using them together
The common pattern in consulting and banking teams is all three:
- A general assistant or Copilot for research, analysis and first-draft thinking.
- Copilot for the rest of the Office suite — Word documents, Excel models, inbox triage.
- Decky AI for the deck itself: building it out in the firm template, cleaning up formatting, and checking content before it goes out.
They are not mutually exclusive, and Decky AI does not require a Microsoft 365 Copilot licence.
Frequently asked questions
Is Decky AI a replacement for Microsoft Copilot?
No. They solve different problems and are commonly used together. Microsoft 365 Copilot is a firmwide assistant across Word, Excel, Outlook and Teams with access to Microsoft Graph. Decky AI is a specialist for presentation production — formatting, alignment, template compliance and deck-wide content checking inside the open .pptx.
Do I need a Microsoft 365 Copilot licence to use Decky AI?
No. Decky AI is an independent Office Add-in installed from Microsoft AppSource and licensed separately. It does not require or depend on a Microsoft 365 Copilot subscription.
Which is better for a consulting firm, Copilot or Decky AI?
They address different layers. Copilot covers general productivity across the Office suite; Decky AI covers the specific, template-bound work of producing client-ready decks. Firms that produce a high volume of formatted client decks typically get more marginal value from a specialist on that workflow.