Gamma AI Presentation vs Copilot in PowerPoint for Client Decks: Costs and Fit

Choose Copilot in PowerPoint if the deck must sit in your own template and be edited slide by slide; choose Gamma if you want the tool to pick the layouts and visuals. Gamma lists $9 (Plus) or $18 (Pro) per seat a month on annual billing. Copilot Business adds $21 per user a month to a Microsoft 365 plan.

One run on one deck tells you about that deck, so a winner declared from a single try isn't worth much. A fair test fixes the brief, the source files and the scorecard before either tool produces a slide, and anyone on your team can repeat it. No scores are reported here: what follows is the protocol, what each vendor's own pages say, and the costs, so your run on your deck supplies the result.

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Fix the test before you open either tool

The setup takes about 20 minutes and the test itself about 90. The illustrative job: a five-person consultancy presents the findings of a six-week operations review to a client's leadership team. The source pack is deliberately small and ordinary.

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• A six-page Word summary of findings, written with Word styles (headings and bullets), because both tools read structure better from styled text.
• One Excel table of eight before-and-after metrics, pasted into the Word file as a table so there is a single source file.
• The consultancy's own PowerPoint template or brand kit, with a title layout and a content layout the deck must use.
• Three client quotes, anonymised.

Set the rules next. Both tools get the same instruction, once, and nobody edits it after seeing a result. Each tool gets one free regeneration if the first draft is unusable, and you record that it was needed. A stopwatch runs from the moment you press generate to the moment you would be willing to send the deck. The scorecard weights are written down before anyone looks at a slide, which is the rule that matters most, because people quietly reweight to favour the tool they already like.

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One practical wrinkle: a 12-slide deck is over the limit of 10 slides per prompt that Gamma lists for its Free plan, so run the test on Plus, or cut the brief to 10 slides for both tools. The template is applied through each tool's own mechanism. In PowerPoint you start from the template file. In Gamma you apply a custom theme from its theme builder, as close to your template as you can get it. Time that setup, because it belongs in the cost.

The brief both tools get, word for word

Create a 12-slide client deck from the attached summary.
Slides: title; agenda; context; four findings, each with one
supporting figure; a table of the eight metrics; options;
recommendation; timeline; next steps.
Audience: the client's leadership team. Tone: plain and direct.
No more than 40 words per slide. Use every figure exactly as given.
Do not add statistics, quotes or claims that are not in the source.
Add speaker notes to every slide.

The line that does the most work is "Do not add statistics, quotes or claims that are not in the source". Decks are where invented numbers do the most damage, because a confident slide looks finished. Both tools can still drift, so the fidelity audit below is a scored criterion, not an afterthought.

Client data: the gate before the scorecard

The source pack holds client figures, so check each tool's data terms before real material goes in. Use a dummy client for the trial if the terms aren't settled. Treat this as pass or fail: if a tool breaches the client's engagement terms, its score doesn't matter.

On Gamma, the help centre article on AI training says individual plans (Free, Plus, Pro and Ultra) allow data to be used to train AI models by default. You can switch that off in Settings, under the Data Controls tab. Business and Enterprise workspaces are automatically excluded, and the setting is locked. Gamma's terms of service say much the same: on a Team or Business plan it doesn't train on your content, while on a plan without privacy controls, or with them off, you grant it a licence to use your content to train its models. Its pricing page also states SOC 2 Type II compliance.

On Microsoft's side, the privacy documentation for Copilot says prompts, responses and data accessed through Microsoft Graph aren't used to train foundation models, and the Copilot Chat overview says enterprise data protection applies to eligible work and school accounts. If Copilot uses web search to enrich a deck, Microsoft says the query is generated from your prompt as a few words and handled by the Bing service under separate terms, so keep client names out of the brief where you can.

For a consultancy under a non-disclosure agreement, the practical reading is plain. Gamma on Plus or Pro needs the training switch turned off before any client material goes in, and Business removes the question. Copilot on a work account is covered by Microsoft's commitments. Either way, ask the client before their figures go anywhere that isn't your own systems.

What each vendor says its tool does

These rows come from the vendors' own pages, read on 1 November 2026. They predict where the two tools should differ; your test shows whether they do.

Five edits that separate the tools

The first draft is a poor discriminator, because both tools can produce a plausible 12-slide deck. The differences show up in the edits a partner asks for the next morning. Run these five in order and time each one.

1. Move the recommendation to slide 3 and update the agenda. This tests structural edits and whether dependent slides follow.
2. Rewrite slide 5 for the finance director instead of the operations director. This tests a targeted rewrite that leaves the layout alone.
3. Replace the chart on slide 6 with a table of the same figures. This tests how each tool treats data objects. Microsoft's own example prompts include adding a chart slide from a spreadsheet and turning a bullet list into SmartArt, so check whether the result is a real, editable table or a picture of one.
4. Swap the closing image and change the accent colour to the client's. This tests brand control after generation.
5. Cut slide 10 to 25 words and rewrite its speaker notes. This tests density control and notes.

For each edit, record the steps, the minutes, whether any other slide changed unexpectedly, and whether you would have been quicker doing it by hand. After every edit, flip through all 12 slides. AI edits sometimes alter neighbours, and a tool that takes three attempts at edit 3 is costing you time that the deck never gets back.

The fidelity audit: figures, quotes and invented claims

Fidelity carries the heaviest weight in the scorecard below, so give it a structured check. List the eight metrics from the source in a small table with three columns, the source value, the value on each tool's slide, and a mark: match, changed (rounded, different units, different period) or missing. Then search each deck for any number or quote that isn't in the source. A comparison phrase such as "ahead of the industry average" counts, because the source contained no benchmark.

Count the marks. A single changed figure on a findings slide costs more than any layout flaw, since a client may quote it back to you. A good result is zero changed figures and zero invented claims on the first draft, and a tool that needs a regeneration to get there should record the regeneration in its time. For the full routine of building a client proposal deck from your own notes, see a Gamma proposal deck built from client notes.

Template fit and export: where the two differ on paper

Template fit is where the vendors' documents predict the clearest difference. Microsoft's support page for creating a presentation says starting from your organisation's standard template tells Copilot to keep the theme and design, and that it then builds from the existing layouts. The deck's skeleton is your master slides, so edits to the master should carry through to every slide that uses those layouts, which is worth confirming in your own run.

Gamma works from themes, and its help article on exporting to PowerPoint is specific about what happens at the exit. Exports match Present Mode rather than Edit Mode. Theme fonts are embedded in the .pptx, but Google Slides ignores embedded fonts and substitutes its own. Tables export as real, editable tables by default, though PowerPoint can't show rounded table corners. Speaker notes are included. Gradient headings may render as a single colour and frosted backgrounds may use fallback styles. PowerPoint and Google Slides exports don't include a slide master layout, so the Slide Master view appears blank while content and styling still apply to each slide. PDF exports are static, and the article recommends the desktop site because export may not work reliably in a mobile browser. Free workspaces can export, but with a Made by Gamma badge that paid plans remove.

Taken together, the paper prediction is that a Gamma export works as a finished deck but not as a template. Whether that matters depends on who touches the file next, which is why a handover test belongs in the run.

• Open each .pptx on a machine without your fonts, then click into text and into a table.
• Open the Slide Master and note what is there.
• Check the speaker notes exist on all 12 slides.
• Confirm the badge is absent (Gamma) and the file size is sensible for email.

The longer treatment of what survives an export, and how to repair what doesn't, is in exporting Gamma to PowerPoint: what formatting survives.

Scoring: fix the weights before anyone sees a slide

Score each tool from 0 to 5 on six criteria, multiply by the weight you fixed in advance, add up, and divide the total by 5 to get a percentage (the weights sum to 100, so the maximum is 500). Define each score before you start, so a 4 means the same thing for both tools.

Fix the weights before the run, in writing. The two sets below are examples of how differently two consultancies can value the same six criteria; neither is a recommendation, and no scores sit beside them, because the only scores worth having are the ones your own run produces.

The template-bound firm hands editable files to clients whose own designers will reopen them, so template fit, editing control and export carry 55 of its 100 points. The speed-first firm presents from a link the same afternoon, so story and time carry 55 of its points. Written as a sum, a tool that scores F for fidelity, S for story, E for editing, T for template fit, X for export and M for time gets 25F + 10S + 20E + 20T + 15X + 10M out of 500 under the first set, and 20F + 25S + 10E + 5T + 10X + 30M under the second. Divide by five for a percentage.

Work out what one point is worth before you score, because it tells you which criteria can decide the result. Under the template-bound weights, one point on fidelity moves a total by 5 percentage points, one point on template fit or editing control by 4, and one point on time by only 2. Under the speed-first weights, one point on time moves it by 6 and one point on template fit by 1. So in the first firm a tool that is two points quicker but one point worse on template fit has gained nothing; in the second it has gained 11 percentage points. The same deck, the same raw scores and the same stopwatch can therefore produce opposite winners for two firms, and the scorecard is what makes that visible instead of letting it hide inside a gut feeling.

Copy the sheet below once per tool and fill it in during the run, not afterwards. The notes column is where the evidence goes: the changed figure on slide 6, the edit that took three attempts, the font that fell back on a clean machine.

Tool: ____________   Plan and price used: ____________   Date: ______
Criterion             Score 0-5   Weight   Score x weight   Evidence
Fidelity              ___         ___      ___              ________
Story                 ___         ___      ___              ________
Editing control       ___         ___      ___              ________
Template fit          ___         ___      ___              ________
Export and handover   ___         ___      ___              ________
Time to client-ready  ___         ___      ___              ________
Total (out of 500)                         ___
Percentage (total / 5)                     ___
Regenerations used: ___    Minutes, generate to client-ready: ___

Have a second person score the same two decks without seeing your sheet. Where your scores differ by more than one point on any criterion, the definition of that score is too loose; tighten the wording in the "A 5 means" column and rescore both tools, rather than averaging the disagreement away.

A margin under about 10 points should be read as a tie. Break it with the gate (data terms), then with a second run on a different deck, since one deck can favour one tool by accident. The wider comparison across more tools is in the best AI for consulting presentations: Gamma, Copilot and ChatGPT.

What each costs a five-person consultancy

List prices from Gamma's pricing page and Microsoft's Copilot pricing page, read on 1 November 2026. Gamma's figures are per seat and shown as the monthly equivalent on annual billing. Microsoft's add-on is billed yearly.

Microsoft's page also warns that some advanced AI features are usage-billed on top of licence fees, and that the trial converts to a paid plan after one month unless you cancel, with a card required at sign-up. Gamma's credits roll over up to twice the monthly amount, so Plus can hold up to 3,000. Credits per deck vary with the model and the length, so note the balance before and after each run, if the app shows it, and you will know what a deck really costs.

Put the figures against time. Suppose a client deck takes 6 hours by hand and 3.5 hours with either tool, which the test will let you replace with your own number. The saving is 2.5 hours. At an internal cost of $100 an hour that is $250 per deck. Both tools together cost $150 a month for five users, so they pay back after 0.6 decks a month. Gamma Plus alone, at $45 a month, pays back after 0.18 decks a month, roughly one deck every five to six months. The sums are illustrative, but the shape holds: the licence fee is small against the partner time, so the choice should rest on fit, data terms and handover, not on a $9 difference. What the licence doesn't cover is the checking time, which the fidelity audit puts back in the sum. The Gamma plan detail sits in Gamma pricing plans: how many decks Plus and Pro credits give you, and a worked Copilot route is in creating a PowerPoint presentation with Copilot from a Word proposal.

A decision table for after your own run

Once the scores are in and the gate has been checked, these are the conditions that should tip the choice.

Three mistakes spoil the result. Scoring after you have seen the decks lets preference leak into the numbers. Judging only the first draft rewards the tool that looks best at first glance, when the five edits are where tools differ. And giving real client figures to a tool before checking its terms turns a harmless comparison into a disclosure.

A run of this kind takes an afternoon and costs nothing if you use the free options in the FAQ, which makes it cheap next to a year of licences for five people. If you would rather have the test set up around your real deck jobs and client terms, that is what my AI implementation consultation covers.

Testing Gamma against Copilot: common questions

Can I run this test for free?

Mostly. Gamma's Free plan gives 400 credits at sign-up and up to 10 slides per prompt, so test a 10-slide version, and its exports carry a Made by Gamma badge. Microsoft's pricing page offers a one-month free trial on the business Copilot plans, which needs a card and converts to paid unless you cancel. Free Copilot Chat in the browser is a different product from Copilot in PowerPoint.

Does Gamma export editable text to PowerPoint?

Gamma's help article says tables export as real, editable tables, speaker notes are included and theme fonts are embedded. It doesn't say whether every other text element becomes an editable text box. Open an export in PowerPoint during your test, click into several slides, and open the Slide Master, which the same article says arrives blank.

Is Copilot in PowerPoint included in a Microsoft 365 business plan?

Not by default. For small business Microsoft lists a Copilot Business add-on at $21 per user a month billed yearly, with a first-year promotion at $18 to 31 December 2026 for eligible existing customers, plus bundles with Business Standard or Premium. Copilot Chat in the browser is included at no extra cost with eligible plans, but it isn't the same as Copilot working inside your slides.

Can I use the same test for other deck tools?

Yes. Keep the brief, the source pack, the five edits and the weights, and swap in the tool you want to compare. The scorecard is what makes results comparable across tools, so don't change it mid-test. Record the plan and price you used, because a tool tested on its top tier may not behave the same way on the tier you can afford.

Further reads

• Best AI Tools for Management Consultants: Seven From Research to Decks — Seven AI tools for consultants, from research to decks.
• Beautiful.ai Review: Client Decks vs PowerPoint Copilot and Gamma — A third deck tool measured against Copilot and Gamma.
• How Consultants Use AI to Write Proposals in Under an Hour — Writing the proposal before the deck, in under an hour.
• Microsoft 365 Copilot Pricing: Business vs Enterprise Licences — Copilot licences compared, business against enterprise.
• Best AI for Consulting Work: From Interview Notes to Findings Deck — From interview notes to a findings deck.
• Claude vs ChatGPT for Consultants: Which to Pay For and How to Test Both — One client deliverable run on both assistants: a 60-page report summary and an options analysis, scored by cost per finished deliverable.
• Best AI Tools for Creative Agencies: Briefs, Concepts and Client Sign-Off — Ten jobs from brief intake to sign-off, with Gamma, Canva, ChatGPT and Claude, each with an example, plus rights and disclosure checks.
• Best AI Tools for Investment Management: Committee Packs and Minutes — Which AI tools help a small investment firm assemble committee packs and draft minutes, with the record-keeping and vendor-terms checks that stay human.
• AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.

Sources: Gamma pricing page, Gamma help centre articles on exporting and on AI training, Gamma terms of service and product pages, Microsoft Support pages on creating a presentation with Copilot in PowerPoint and on editing with Copilot in PowerPoint, Microsoft Copilot for business pricing page, Microsoft Learn pages on Copilot Chat, Copilot privacy and enterprise data protection, read on 1 November 2026 and checked again on 4 November 2026. No test scores are reported; time and cost figures in the worked example are illustrative.