Best AI for Consulting Presentations: Gamma, Copilot, ChatGPT

For most consultants, build the client deck with Copilot in PowerPoint if your firm lives in Microsoft 365 and has a firm template, use Gamma when you want a fast, designed first draft for internal or early-stage decks, and use ChatGPT to shape the storyline and slide wording. Confidentiality settings decide which one you may use.

That is the short version of a comparison you can test yourself in an afternoon. The lines have blurred during 2026: ChatGPT now has a PowerPoint add-in that edits inside your own file, and Gamma exports to PowerPoint on every plan. So the sections below set one outline, run it three ways and give a score sheet, and the decision rests on your own editing time rather than on demos. Plan prices were read from vendor pages in November 2026; check each before buying.

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The test outline: one deck, three builds

Use a real structure, not a toy. An illustrative engagement: a food-packaging manufacturer is considering a second site, and the consultant's deck recommends a location approach, not a location. Twelve slides:

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1. Title and the question the client asked
2. Executive summary: recommendation in three lines
3. Current capacity and the constraint (utilisation against forecast demand)
4. Option A: expand the existing site
5. Option B: second site, close to customers
6. Option C: contract manufacturing partner
7. Comparison table across cost, speed, control and risk
8. Financial view: five-year cost per option
9. Risks and mitigations
10. Recommendation and rationale
11. Roadmap: first 90 days
12. Decisions needed from the client at the next meeting

Prepare one source document with the facts (invented but internally consistent: current plant at 91 per cent utilisation, demand forecast up 18 per cent over two years, option costs of $4.2m, $11.5m and $1.8m a year respectively). The same input goes to each tool so that differences come from the tool, not the brief.

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Build one: Gamma

Gamma's pricing page lists a free plan ($0, 400 starter credits that do not refill, up to 10 slides per prompt, import from PDF and PPTX, export to PDF, PPTX, PNG and Google Slides), Plus at $9 a seat a month (1,500 monthly credits, up to 100 slides per prompt, Gamma branding removed), Pro at $18 (4,000 monthly credits, custom branding, detailed analytics, up to 10 custom domains) and Ultra at $90 (20,000 credits and the most advanced models). Those are per-month prices on annual billing ($108, $216 and $1,080 a seat a year); Gamma says annual billing saves up to 28% against paying monthly, so month-to-month costs more. Unused credits roll over up to twice the monthly amount.

For a firm, Gamma's help centre describes a Business plan with everything in Pro plus single sign-on, 10,000 credits per member a month, 100 custom domains, SOC 2 documentation on request and the training opt-out locked on for the whole workspace, billed annually per member. The Business price is not shown on the public page, so ask for a quote if two or more of you will use it on client work.

The workflow for the test: choose the option to paste in your own text, paste the twelve-slide outline with the facts, pick the closest preset theme, and generate. Keep an eye on credits. Gamma says the number an action uses depends on what you are doing, which model runs and how long or complex the generation is, so a 12-slide deck with generated images costs more than a text-only one, and regenerating slides again and again drains a Plus allowance faster than you expect.

What you get is a visually finished draft in a minute or two. What you fix: numbers on charts (check each against your source), the comparison table (often over-simplified), invented images, and the tone of the executive summary. If you move the deck to PowerPoint, expect fonts and spacing to shift and plan time to restyle it on the firm's master. Gamma's FAQ lists the model providers it uses (including Claude, ChatGPT and Gemini among others), so think of it as a layer over those models, which matters when you read its data terms.

Build two: Copilot in PowerPoint

Copilot builds inside PowerPoint, so the firm's slide master, fonts and colours are the starting point. Microsoft's support page describes creating a presentation from a prompt or from a Word document, says that organising the Word file with Styles helps Copilot understand its structure, recommends starting from your organisation's standard template if it has one, and notes that Copilot applies a Brand Kit if you have selected one. It adds that Copilot works best with Word documents under 24 MB. On price, Microsoft lists the Microsoft 365 Copilot Business add-on at $21 a user a month on annual billing ($25.20 paid monthly) for organisations of up to 300 users, with an $18 promotional price showing at the time of writing; bundles with Business Standard or Business Premium come to $23.50 and $32 a user a month on annual billing. Enterprise Copilot is $30 a user a month on an annual commitment. Licence names moved during 2026, so confirm what your tenant has in the admin centre before you commit.

The workflow for the test: write the facts and the twelve-slide outline as a Word document using heading styles, save it where Copilot can reach it, and ask Copilot to create a presentation from the file using the firm template. Then refine slide by slide with short prompts such as "make slide 7 a table with cost, speed, control and risk as columns".

What you get is usually a more conservative deck in the right template, with fewer design flourishes and less invented imagery. What you fix: slide count and pacing, wordy bullets, anything that treats a number in your source as a headline when it is a caveat. Because the file is a normal PowerPoint, the editing is ordinary editing: no export step and no restyling. If your proposal is already in Word, turning a Word proposal into a deck with Copilot walks the steps.

Build three: ChatGPT

ChatGPT's strongest contribution is the thinking, not the formatting. Give it the source document and ask for slide-by-slide content: the headline as a full sentence (the "action title" consultants use), three supporting points, the chart that would prove it and the source for each number.

You are helping a consultant build a 12-slide deck from the facts below.
For each slide give: (1) an action title of under 15 words that states
the conclusion; (2) up to three supporting points with the numbers from
the facts only; (3) the visual that would prove it (chart type, axes);
(4) what the client is likely to ask. Do not add any number that is not
in the facts. Flag any slide where the facts are insufficient.

[paste facts and outline]

Illustrative output for slide 3: title "The current site will hit its capacity limit within 18 months at forecast demand"; support "91 per cent utilisation today; demand up 18 per cent over two years"; visual "bar chart of utilisation by quarter against a 100 per cent line"; client question "Can overtime shifts delay the limit?" Slide 8 comes back flagged: "Facts do not give a discount rate; five-year cost comparison needs one." That flag is the value: it exposes the gap before the deck exists.

ChatGPT can now do the build as well. OpenAI's ChatGPT for PowerPoint add-in, which its page says is available on every plan from Free upwards, creates and edits slides inside PowerPoint from notes, documents or an existing deck, so the firm template stays in play. ChatGPT Slides, listed for Pro, Business and Enterprise, builds a deck inside ChatGPT, can take an example deck as a style guide, and exports to PowerPoint or Google Slides. For this test, run the outline prompt above first, then either paste the content into your template yourself or ask the add-in to build the slides in your template file, and score whichever route you would really use. Plus is $20 a month; ChatGPT Business is $20 a seat on annual billing or $25 monthly, from two seats.

Score sheet: measure editing time, not impressions

For each build, record these on a single sheet:

An illustrative filled-in sheet (invented to show the shape, not a result): Gamma, 6 minutes to draft, 85 to sendable, 3 wrong facts, template fidelity 2, 4 slides kept; Copilot, 9, 70, 2, 5, 5; ChatGPT plus manual build, 12, 95, 1, 4, 3. Reading it: Gamma wins on the first draft and loses on restyling; Copilot wins where the template matters; the ChatGPT route has the fewest invented facts because its prompt required flags, but it demands the most manual assembly. Your numbers will differ, which is the point of running it. A consultant who builds ten decks a year may prefer the cheapest route; one who builds ten a month should optimise the sendable-deck minutes.

Run it on a past engagement where you know the right answers. That is the only way to catch an invented number, since you can check against what you actually delivered.

Brand templates and the firm's look

Three approaches, three levels of control. Copilot uses your PowerPoint master, so layouts, fonts and colours are right from the start; the cost is that you inherit its habit of simple, text-heavy slides. Gamma needs its brand settings: the pricing page lists custom branding from Pro upwards, and on the free and Plus plans you will restyle manually. ChatGPT splits in two: its PowerPoint add-in works inside your file much as Copilot does, while ChatGPT Slides takes an example deck as its style guide and needs checking against the master after export.

A practical hybrid: draft the story in ChatGPT or Claude, build the slides in PowerPoint with Copilot or the ChatGPT add-in, and keep Gamma for internal workshop decks and quick concept visuals where branding matters less. The test sheet above will tell you whether that hybrid is worth the extra handoff. If you also work in Google Slides, building a client deck from a Google Doc with Gemini covers that route.

Confidentiality: decide before you paste

A client deck is the most sensitive document you produce, so the confidentiality decision comes first. Four questions, answered per tool and plan:

1. Does the plan train on my content? Business plans of the large assistants generally do not train on business content by default, while consumer plans let users switch training off in their settings. OpenAI's add-in page, for example, says data is not used to improve its models by default on Business, Enterprise, Edu and Teachers plans, so on Free or Plus switch the setting off first. Gamma's help centre describes the training opt-out as a setting on Pro and as locked on for Business workspaces, so on an individual plan check it before client material goes in, or leave client data out.
2. Where does the data live and for how long? Read the vendor's trust page. Gamma's pricing page describes the company as SOC 2 Type II compliant and links a trust centre; Microsoft's Copilot works inside the Microsoft 365 boundary your firm already manages.
3. What does my engagement contract say? Many clients restrict third-party processing of their data. Check before a tool touches anything identifiable.
4. Can I anonymise? Replace the client name with "the client" and round figures when you only need structure. Rebuild the real numbers in the final file.

A realistic mistake: a consultant pastes a client's board paper into a free-plan assistant to summarise it, then later finds the contract barred any third-party tool. The cost is a difficult call to the client. The routine above, plus a line in the proposal listing the tools you use, prevents it.

One slide, before and after

The quickest way to judge a tool is to look at a single slide. Slide 7 of the test deck is the comparison table. A first-pass version from a fast generator often reads: title "Comparing our options", three bullets of generic text and a stock image of a factory. The version you would send reads: title "Contract manufacturing is cheapest but gives the least control; a second site is dearest and gives the most", a four-column table of cost, speed, control and risk with one-word cell ratings and the dollar figure beneath each option, and a footnote naming the source of the cost estimates. Notice what changed: the title now states the finding, the table replaces the picture, and each cell can be traced. Whichever tool you use, make "rewrite every title as a finding" a fixed editing step. It is the edit that most separates a consultant's deck from a generated one, and it takes about ten minutes across twelve slides.

A prompt that helps with that step, run in any assistant after the first draft:

Here are my slide titles in order. Rewrite each as a one-sentence
finding, under 15 words, so that reading only the titles tells the
whole story. If two titles say the same thing, tell me and suggest
which slide to cut. Do not change any numbers.

[paste titles]

Handing a Gamma deck to PowerPoint without losing a day

Gamma exports to PPTX, PDF, PNG and Google Slides on the free plan according to its pricing page, so the handoff is possible on any tier. For the repairs that come up most, what survives a Gamma export to PowerPoint goes further. A checklist that keeps it quick:

• Lock the content in Gamma first. Edits after export live only in PowerPoint, and going back and forth duplicates work.
• Export to PPTX, then apply your firm's master through the Design or Slide Master view and let the layouts reflow.
• Replace every chart image with a native chart if the client will want to edit it; check that each value matches the source table.
• Delete any stock imagery that does not carry meaning, since it dilutes a consulting deck.
• Run spell check in the client's house spelling; generators often default to a different variant.
• Check the notes pane and the file properties for stray metadata before sending.

A realistic slip: a consultant exports, applies the template and sends, and the client notices that two slide titles were left in the generator's default font. The checklist item "apply master, then scan every slide at thumbnail size" catches it in thirty seconds.

Story, build or polish: matching the tool to the stage

Notice that the rule is about the situation, not the product. A consultant can reasonably use all three at different stages, and the cost of $20 to $30 a month for a second or third tool is trivial next to the hour it may save. The caution is to avoid a stack so large that nobody on the team knows where the latest version lives. Pick one tool for the final build and one for thinking, and write that into the team's working notes.

Charts and numbers: the part to never trust unchecked

Generated decks look best where they are most dangerous: charts. Models can produce a tidy chart from a few figures and misread a unit or round a figure in the wrong direction. Use a three-step habit. First, give the tool a small table, not a paragraph, whenever a chart is needed. Second, after generation, click into each chart and compare the underlying values to your source sheet, line by line. Third, read the axis labels aloud; a chart in thousands titled as millions has embarrassed more than one consultant. For analysis work in a spreadsheet before the deck, the wider stack for management consultants shows where the numbers should be built.

One illustrative example of a catch: the source says option C costs $1.8m a year; the draft chart plots 1.8 against an axis labelled "$k". The slide looks fine and is a thousand times wrong. That is why a second person reading the numbers against the source, even for five minutes, belongs in the process for every client deck regardless of tool.

Three seats, six decks a month: the running costs

Take a three-person consultancy that builds about six client decks a month. Option 1: three Copilot Business licences at $21 a month on annual billing is $63 a month, which also covers Word, Outlook and Teams uses beyond decks. Option 2: three Gamma Pro seats at $18 a seat on annual billing is $54 a month (more if you pay month to month), plus a general assistant for outlines at about $20 per person ($60), $114 in all. Option 3: three general assistant plans at $60 and manual template work. None of these costs matters beside the time: at a billing rate of $150 an hour, saving thirty minutes on one deck repays a month of any option. The sums therefore favour the tool that cuts your sendable-deck minutes most, subject to the confidentiality rules, not the cheapest.

If you want help choosing and setting it up with your team's real decks, that is what my AI implementation consultation covers.

Questions consultants ask before choosing a deck tool

Which tool keeps my firm's template intact?

Copilot in PowerPoint works inside your own PowerPoint files, so slide masters and fonts stay yours. Gamma lets you set custom branding on its Pro plan and above, but it rebuilds layouts in its own system. ChatGPT's PowerPoint add-in also works inside your own file, but text pasted from a chat needs the template applied afterwards.

Is Gamma free to use for client work?

Gamma has a free plan with 400 credits at signup and up to 10 slides per prompt, with Gamma branding. Removing the branding needs Plus ($9 a seat a month on annual billing), and custom branding needs Pro ($18 on annual billing).

Can I paste client data into any of these?

Not without checking your engagement terms and the plan's data rules first. Prefer a business plan with training off, anonymise sensitive figures, and tell the client which tools touch their material.

How long does editing an AI draft deck take?

It depends on the tool and your outline. Measure it on one real past deck: count minutes from first draft to a deck you would send. That number, not a vendor demo, decides which tool pays back.

Further reads

• How Consultants Use AI to Write Proposals in Under an Hour — Write the proposal that feeds the deck.
• The AI Tool Stack a One-Person Consultancy Actually Needs — A lean AI stack for a one-person consultancy.
• How to Write a Sales Deck With AI That Wins Meetings — Write a deck that wins the meeting.
• Gamma AI Presentation vs Copilot in PowerPoint for Client Decks: Costs and Fit — A repeatable test for Gamma against Copilot in PowerPoint on one client deck: the brief, five edits, a weighted scorecard, export checks and what each costs.
• AI Brand Strategy: Positioning Workshops and Messaging for Agencies — A care-agency strategy project in stages: twelve stakeholder interviews, three scored positioning options, a message house and the client workshop.
• Best AI for Consulting Work: From Interview Notes to Findings Deck — Transcribe, code themes, build an evidence table and draft the findings slides, with consent steps, prompts, sample output and a worked 12-interview example.
• Microsoft AI Chatbot for Business: Copilot Chat vs Microsoft 365 Copilot — Free Copilot Chat or the paid licence? A plain choice with list prices, a worked three-user cost and a data protection check.
• AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.

Sources: gamma.app/pricing and Gamma help centre articles on plans and on Business, the Microsoft Support page on creating a presentation with Copilot in PowerPoint, Microsoft 365 Copilot Business and Enterprise pricing pages, chatgpt.com pricing, ChatGPT Slides and ChatGPT for PowerPoint pages, and OpenAI's ChatGPT Business pricing page, all read 4 November 2026.