ChatGPT vs. Google Gemini vs. Microsoft Copilot: Which AI Assistant Is Right for Your Australian Business? product guide

AI Summary

Product: ChatGPT vs. Google Gemini vs. Microsoft Copilot — Australian Business Comparison Brand: OpenAI / Microsoft / Google Category: AI Assistant / Productivity Software Primary Use: Helping Australian business owners choose the right general-purpose AI assistant based on their existing office stack, budget, compliance needs, and workflow requirements.

Quick Facts

Best For: Australian SME owners evaluating ChatGPT, Microsoft Copilot, or Google Gemini for business use
Key Benefit: Structured, Australia-specific decision framework covering pricing in AUD, data privacy obligations, ecosystem integration, and compliance considerations
Form Factor: Cloud-based SaaS AI assistants (browser, desktop, and mobile interfaces)
Application Method: Subscription-based access via provider platform; embedded within Microsoft 365 or Google Workspace where applicable

Common Questions This Guide Answers

Which AI assistant is best for Australian businesses already using Microsoft 365? → Microsoft Copilot — it is embedded directly in Outlook, Teams, Word, Excel, SharePoint, and OneDrive with no context-switching required.
Which AI assistant offers the best value in AUD for Google Workspace users? → Google Gemini — it is included in Google Workspace Business Standard from approximately AUD $19.80/user/month (ex-GST, annual), with no additional AI subscription required as of 15 January 2025.
Which AI assistant is safest for regulated Australian industries such as healthcare, finance, legal, or government? → Microsoft Copilot — it has the strongest compliance posture, with IRAP-assessed services, Australian data centres, and operation within the Microsoft 365 trust boundary respecting tenant permissions and audit controls.
Is it safe to enter client or staff data into a free AI tool tier? → No — on consumer free tiers, prompts may be used to train the underlying model, which may breach obligations under the Privacy Act 1988 and the Australian Privacy Principles.
Does ChatGPT Enterprise offer Australian data residency? → Yes — Australian data residency is available at enterprise tier, though inference processing defaults to the United States.
Which AI assistant is best for businesses using a mixed tool stack such as Xero, Slack, Canva, or Shopify? → ChatGPT — it is the most platform-agnostic of the three and works regardless of which ecosystem a business uses.
When did Google include Gemini AI in all Google Workspace Business and Enterprise plans? → 15 January 2025.
What is the approximate total cost of Microsoft 365 Copilot in AUD? → Approximately AUD $40–50 per user per month total, including the required existing Microsoft 365 subscription.
Can any of these AI tools replace a qualified Australian accountant or lawyer? → No — all three tools can produce errors on Australian GST, employment law, and state-specific regulations; all regulatory or compliance output must be verified by a qualified Australian professional.
What did the ACCC allege against Microsoft in late 2025? → That bundling Copilot into rising Office 365 prices misled approximately 2.7 million Australian users.

ChatGPT vs. Google Gemini vs. Microsoft Copilot: Which AI assistant is right for your Australian business?

Every week, another Australian business owner signs up for an AI assistant — and quietly cancels three months later because they picked the wrong one. It's not that the tools don't work. It's that the decision was made without a clear framework for what their business actually needs.

The three dominant general-purpose AI assistants — OpenAI's ChatGPT, Google Gemini, and Microsoft Copilot — are not interchangeable. They're built on different philosophies, serve different workflows, and carry meaningfully different implications for your data, your team, and your budget. For an Australian business owner without a technical background, the marketing language around all three sounds nearly identical. The differences only become visible when you look at what they actually do inside your existing tools, how they handle your data under Australian law, and what the real cost looks like in AUD.

This guide cuts through the noise. Before you commit to a monthly subscription, here's what you genuinely need to know.

What each tool actually is (in plain English)

Before comparing them, understand what each product is designed to do — because the design philosophy shapes every practical difference.

ChatGPT is a versatile conversational AI for drafting content, brainstorming, and handling a wide range of queries. Think of it as a highly capable, always-available generalist — a blank-canvas tool you bring your work to, rather than one embedded in your existing software.

Microsoft Copilot is AI built into Microsoft's productivity suite. It runs on OpenAI's technology but sits directly inside Word, Excel, PowerPoint, and Teams, changing how you interact with tools you already use every day. If ChatGPT is a Swiss Army knife, Copilot is a power tool set built into your existing workshop.

Google Gemini is Google's most advanced AI model, with strong real-time information processing and deep integration across Google's services. It's designed to compete directly with ChatGPT and Copilot, and it's particularly good at research, analysis, and anything that benefits from live web access.

The simplest summary: ChatGPT suits businesses that want maximum flexibility. Copilot suits businesses already living in Microsoft 365. Gemini suits businesses on Google Workspace — or those who need real-time, research-heavy outputs.

Head-to-head comparison: what non-technical users will actually notice

Writing quality and tone

For most Australian SMEs, writing is the primary use case — emails, proposals, social media posts, customer communications. All three tools get this done, but with different results.

In structured content generation tests, ChatGPT tends to lead on structure, clear headings, and readability. It produces writing that feels natural and adapts well to different tones — whether you need a formal client letter or a casual Instagram caption.

Copilot is less about open-ended creativity and more about efficiency. It's built for professional business communications, and for that purpose its tone is often well-calibrated. It can feel constrained when you need personality or distinctly Australian idioms.

Gemini performs strongly on factual accuracy and real-time grounding. It leads on transparency citations that link back to specific source documents — which matters when verifiable accuracy is the priority. For Australian businesses in regulated sectors — financial advice, allied health, legal services — that auditability is a genuine differentiator.

Australian context and local accuracy

This is a dimension most global comparisons overlook entirely, and it matters enormously for Australian business owners.

All three tools have been trained on predominantly US-centric data. When asked about GST obligations, Australian employment law, local councils, or state-specific regulations, all three can and do produce errors. None of them should be treated as a substitute for a qualified Australian accountant or lawyer (see our guide on AI and Australian Privacy Law: What Every Business Owner Needs to Know for a full breakdown of the compliance risks).

That said, Gemini's integration with live Google Search gives it a practical advantage for real-time Australian context — current interest rates, recent ATO guidance, local business news. ChatGPT and Copilot, without web browsing enabled, are more likely to produce outdated information on fast-moving local topics.

For tasks where Australian context is critical — writing content that uses Australian spelling (e.g., "organisation," "authorise"), referencing the NDIS, mentioning state-based public holidays, or citing the Fair Work Act — all three tools require careful human review. The practical advice: always verify any regulatory or compliance output with a qualified Australian professional, regardless of which tool you use.

Research and document analysis

Gemini is currently the standout for deep, information-dense research. Its context window exceeds one million tokens, which means it can analyse entire libraries of documents or hour-long videos in a single prompt, with real-time citations. For an Australian professional services firm that needs to summarise lengthy contracts, analyse reports, or review large policy documents, that's a significant practical advantage.

ChatGPT remains the most versatile analytical option, particularly strong at complex reasoning, advanced data visualisation via its Python-based analysis tool, and nuanced creative synthesis.

Microsoft Copilot is the clear winner for corporate analysis across Microsoft 365. If your business stores files in SharePoint and OneDrive, Copilot can pull from that internal knowledge base in ways that neither ChatGPT nor Gemini can match without additional setup.

Pricing in AUD: the real cost of each tool

This is where Australian business owners often get a surprise. All three tools have free tiers — but the free versions are significantly limited for business use. Here's what you're actually looking at when you pay.

Pricing comparison table

Tool	Free Tier	Individual Paid Plan	Business/Enterprise Plan (AUD approx.)
ChatGPT	Yes (limited)	~AUD $32/user/month (Plus)	ChatGPT Enterprise — contact sales for pricing
Google Gemini	Yes (via Google account)	Included in Google Workspace Business Standard from ~AUD $19.80/user/month (ex-GST, annual)	Business Plus from ~AUD $30.90/user/month (ex-GST)
Microsoft Copilot	Yes (basic)	Copilot Pro ~AUD $32/user/month	Microsoft 365 Copilot Business add-on — approx. AUD $40–50/user/month total

Note: All AUD figures are approximate, subject to exchange rate fluctuations, and GST applies to most plans. Always verify current pricing on the provider's Australian pricing page before purchasing.

From 17 March 2025, Google Workspace plans in Australia include Gemini AI at: Business Starter AU$11.80/user/month (or AU$9.90/user/year, ex-GST) and Business Standard AU$23.60/user/month (or AU$19.80/user/year, ex-GST).

From 15 January 2025, Google includes Gemini in all Google Workspace subscriptions regardless of plan level. The catch: Google raised Workspace pricing by 15–20% at the same time.

For Microsoft, one hour per day per person in productivity savings is not trivial in an Australian wage environment. Over a year, even half that benefit can justify an AUD $40–50/user/month licence — particularly when that time gets redirected into client conversations, customer service, or sales.

The hidden cost most businesses miss: the advertised price doesn't always include mandatory base licences (Microsoft 365 or Google Workspace) or technical support. For Microsoft Copilot specifically, the full business add-on requires an existing eligible Microsoft 365 subscription — so the true per-seat cost is the sum of both.

Worth noting for Australian businesses: in late 2025, the ACCC sued Microsoft, alleging that bundling Copilot into rising Office 365 prices misled 2.7 million users. Read the fine print carefully when evaluating Microsoft's bundled pricing.

Integration with Australian office stacks

The most important question for most Australian SMEs isn't "which AI is smartest?" — it's "which AI works with the tools my team already uses every day?"

If your business runs on Microsoft 365

This covers the majority of Australian businesses. If your team uses Outlook, Word, Excel, Teams, and SharePoint, Microsoft Copilot is the natural fit. It summarises Teams meetings, builds Excel formulas, and drafts Outlook emails — all without leaving the applications your staff already know.

Copilot's adoption is driven more by ease-of-use and compliance than by raw AI capability. If your team is already paying for Microsoft 365 and spends most of their day in Outlook and Teams, the incremental value of adding Copilot is immediately visible. No new interface to learn, no new login, no context-switching.

If your business runs on Google Workspace

Google has embedded Gemini side panels in Gmail, Drive, Docs, Meet, and more — so you can interact with AI without switching apps or context. These features are available in Business Standard, Plus, and Enterprise subscriptions.

From 15 January 2025, all organisations on Google Workspace Business or Enterprise plans gained access to Gemini AI features, including the Gemini Side Panel in Gmail, Docs, Sheets, and Drive; "Help Me Write" in Gmail and Docs; and automatic meeting note-taking in Meet.

For a Google Workspace business, Gemini is now functionally included in your existing subscription — making it the lowest-friction AI adoption path available to Australian SMEs.

If your business uses neither (or a mix)

ChatGPT is the most platform-agnostic of the three. It works just as well whether your data is in Slack, Dropbox, or Notion. For businesses using Xero, MYOB, Canva, or Shopify — a common Australian SME combination — ChatGPT is often the most practical starting point because it doesn't require you to already be invested in a particular ecosystem.

Data privacy and Australian compliance: what you must know

This is the section most AI comparison articles skip. For Australian businesses, it matters enormously. (For a full treatment of your legal obligations, see our dedicated guide: AI and Australian Privacy Law: What Every Business Owner Needs to Know.)

The free-tier risk

On free consumer tiers, your prompts may be used to improve the underlying model. If you're entering client names, business financials, staff information, or any other personal data into a free AI tool, you may be breaching your obligations under the Privacy Act 1988 and the Australian Privacy Principles.

Rule of thumb: never enter identifiable customer or staff data into a free AI tool. The business-tier products of all three platforms offer meaningfully stronger protections.

ChatGPT Enterprise: Australian data residency now available

Data residency is currently available in Europe, the United Kingdom, the United States, Canada, Japan, South Korea, Singapore, India, Australia, and the United Arab Emirates.

By default, OpenAI does not use data from ChatGPT Enterprise, ChatGPT Business, ChatGPT Edu, ChatGPT for Healthcare, ChatGPT for Teachers, or the API platform — including inputs or outputs — for training or improving models.

There's an important caveat, though. Data residency covers data at rest, not data being processed during inference, which still defaults to the US. As one analyst put it: "Enterprises will have to look through two different lenses — where their data is kept, and where their data is actually processed."

Microsoft Copilot: strongest compliance credentials for regulated sectors

Microsoft has Australian data centres, IRAP-assessed services, and ISO and SOC certifications. Copilot operates within the Microsoft 365 trust boundary, meaning it uses your tenant's existing policies, permissions, and audit controls.

For Australian businesses in healthcare, financial services, legal, or government — where data governance is non-negotiable — this is a decisive advantage.

Google Gemini: Workspace controls apply

Your Workspace content is not used to train models for other customers, and existing Workspace data governance and DLP controls apply to Gemini. For businesses already on Google Workspace with their data governance configured correctly, Gemini inherits those existing controls — which reduces the compliance lift compared to adopting a new standalone tool.

Which tool is right for which Australian business?

Choose ChatGPT if:

Your business doesn't primarily run on Microsoft 365 or Google Workspace
You need maximum flexibility for creative, marketing, or content-heavy tasks
You want to experiment with AI before committing to an ecosystem
You use a mixed tool stack (Xero + Slack + Canva + Shopify is a common Australian SME combination)
You value writing quality and versatility above deep workflow integration

Choose Microsoft Copilot if:

Your team already works daily in Outlook, Teams, Word, and Excel
You operate in a regulated industry (healthcare, finance, legal, government) and need strong compliance credentials
You want AI embedded in your workflow with no context-switching
Your IT setup is Microsoft-centric and you want governance that inherits existing tenant policies
You can justify the higher per-seat cost through measurable time savings on document creation, meeting summaries, and email management

Choose Google Gemini if:

Your business already runs on Google Workspace (Gmail, Docs, Drive, Meet)
You want the lowest-friction, most cost-effective AI integration (Gemini is now included in most Workspace plans)
You need real-time information access and research capabilities
You work with large volumes of documents or long-form content
Your team is already familiar with Google's interface and you want minimal retraining

Key takeaways

Your existing office stack is the most important decision factor. Microsoft 365 users should evaluate Copilot first. Google Workspace users already have Gemini included. Businesses on neither should start with ChatGPT.
Free tiers are not safe for business data. All three platforms have enterprise and business tiers with meaningful privacy protections, including Australian data residency options. Don't enter client or staff data into a free consumer account.
Google Gemini offers the best AUD value for Google Workspace users, with AI now bundled into Business Standard plans from approximately AUD $19.80/user/month (ex-GST, annual commitment).
Microsoft Copilot has the strongest compliance posture for regulated Australian industries, with IRAP-assessed services and Australian data centres — but carries the highest total cost.
ChatGPT is the most versatile and platform-agnostic option, making it the best starting point for businesses that want to explore AI without being locked into a single ecosystem.

The decision is not permanent — but the starting point matters

Here's the good news: you're not signing a five-year contract. All three platforms offer monthly billing options and free trials. For most Australian SMEs, the practical approach is to start with whichever tool aligns with your existing office stack, commit to using it for one specific task for 30 days (email drafting, meeting summaries, or content creation are common starting points), and measure the time saved before expanding.

Choosing the wrong tool is recoverable. Not choosing at all — while your competitors build AI-assisted workflows — is the real risk. For guidance on structuring that first 30-day implementation, see our step-by-step guide: How to Implement Your First AI Tool in an Australian Small Business.

And before you feed any business data into any of these platforms, read AI and Australian Privacy Law: What Every Business Owner Needs to Know — it covers the specific obligations under the Privacy Act 1988 and the Australian Privacy Principles that apply to every business using cloud-based AI tools.

References

OpenAI. "Business Data Privacy, Security, and Compliance." OpenAI, 2025. https://openai.com/business-data/
OpenAI. "Expanding Data Residency Access to Business Customers Worldwide." OpenAI, November 2025. https://openai.com/index/expanding-data-residency-access-to-business-customers-worldwide/
Microsoft. "Microsoft 365 Copilot Plans and Pricing." Microsoft Australia, 2025–2026. https://www.microsoft.com/en-au/microsoft-365-copilot/pricing
IntuitionLabs. "Claude vs ChatGPT vs Copilot vs Gemini: 2026 Enterprise Guide." IntuitionLabs, April 2026. https://intuitionlabs.ai/articles/claude-vs-chatgpt-vs-copilot-vs-gemini-enterprise-comparison
IntuitionLabs. "Microsoft Copilot Pricing & Licensing Guide for Business." IntuitionLabs, November 2025. https://intuitionlabs.ai/articles/microsoft-copilot-pricing-licensing
Online is Easy. "Google Workspace Gets a Boost with Gemini AI: What It Means for Your Business." Online is Easy (Australia), 2025. https://www.onlineiseasy.com.au/news/gemini-ai-in-google-workspace
Grokipedia. "Google Workspace Pricing in Australia." Grokipedia, January 2026. https://grokipedia.com/page/Google_Workspace_pricing_in_Australia
DataStudios. "ChatGPT vs Microsoft Copilot vs Google Gemini: Full Report and Comparison (July 2025 Update)." DataStudios, July 2025. https://www.datastudios.org/post/chatgpt-vs-microsoft-copilot-vs-google-gemini-full-report-and-comparison-july-2025-update
365 Digital Consulting. "ChatGPT Enterprise vs Microsoft Copilot vs Google Gemini vs Claude: Ultimate 2025 Buyer's Guide." 365 Digital Consulting, December 2025. https://365digitalconsulting.com/article/chatgpt-enterprise-vs-microsoft-copilot-vs-google-gemini-vs-claude/
LyfeAI. "Copilot vs ChatGPT vs Gemini for Australian Businesses." LyfeAI.com.au, February 2026. https://lyfeai.com.au/microsoft-copilot-vs-chatgpt-gemini-australia/
Tactiq. "Copilot vs ChatGPT vs Gemini: Ultimate 2026 Comparison." Tactiq, March 2026. https://tactiq.io/learn/copilot-vs-chatgpt-vs-gemini
Computerworld / Anirban Roy. "OpenAI Expands Data Residency for Enterprise Customers." Computerworld, December 2025. https://www.computerworld.com/article/4096675/openai-expands-data-residency-for-enterprise-customers.html
Australian Competition and Consumer Commission (ACCC). Proceedings regarding Microsoft Copilot bundling, cited in IntuitionLabs Microsoft Copilot Pricing Report, October 2025.

Frequently Asked Questions

What is ChatGPT: A versatile conversational AI assistant made by OpenAI

What is Microsoft Copilot: An AI tool embedded within Microsoft 365 applications

What is Google Gemini: Google's advanced AI model integrated with Google Workspace

Who makes ChatGPT: OpenAI

Who makes Microsoft Copilot: Microsoft

Who makes Google Gemini: Google

Is ChatGPT built on the same technology as Copilot: Yes, Copilot is built on OpenAI's technology

Which AI is best for Microsoft 365 users: Microsoft Copilot

Which AI is best for Google Workspace users: Google Gemini

Which AI is best for businesses not on Microsoft or Google: ChatGPT

Which AI is most platform-agnostic: ChatGPT

Which AI is most flexible for creative tasks: ChatGPT

Which AI is best for regulated Australian industries: Microsoft Copilot

Which AI has the strongest compliance credentials: Microsoft Copilot

Does Microsoft Copilot have Australian data centres: Yes

Does ChatGPT offer Australian data residency: Yes, at enterprise tier

Does Google Gemini use your data to train models for other customers: No

Does OpenAI train models on ChatGPT Enterprise data by default: No

Is ChatGPT free: Yes, a limited free tier is available

Is Google Gemini free: Yes, a limited free tier is available via Google account

Is Microsoft Copilot free: Yes, a basic free tier is available

What is the cost of ChatGPT Plus in AUD: Approximately AUD $32 per user per month

What is the cost of Microsoft Copilot Pro in AUD: Approximately AUD $32 per user per month

What is the cost of Google Workspace Business Standard in AUD per month: Approximately AUD $23.60 per user per month

What is the cost of Google Workspace Business Standard annually in AUD: Approximately AUD $19.80 per user per month (ex-GST)

Does Google Workspace Business Standard include Gemini AI: Yes, as of 15 January 2025

When did Google include Gemini in all Workspace plans: 15 January 2025

What is the total cost of Microsoft 365 Copilot add-on in AUD: Approximately AUD $40–50 per user per month total

Does Microsoft Copilot require an existing Microsoft 365 subscription: Yes

Did Google raise Workspace pricing when adding Gemini: Yes, by 15–20%

Which AI offers the best AUD value for Google Workspace users: Google Gemini

Is GST applied to AI subscription plans in Australia: Yes, GST applies to most plans

Should AUD pricing be verified before purchasing: Yes, always verify on the provider's Australian pricing page

Which AI has the largest document context window: Google Gemini

What is Google Gemini's context window size: Over 1 million tokens

Which AI is best for analysing large documents: Google Gemini

Which AI is best for cross-referencing Microsoft 365 files: Microsoft Copilot

Can Microsoft Copilot access SharePoint and OneDrive files: Yes

Which AI produces the best structured written content: ChatGPT tends to lead on structure and readability

Which AI is best for real-time Australian information: Google Gemini

Why does Gemini have an advantage for real-time information: It integrates with live Google Search

Can any AI tool replace an Australian accountant or lawyer: No

Should AI regulatory output be verified by an Australian professional: Yes, always

Are all three AI tools trained on predominantly US-centric data: Yes

Can AI tools produce errors on Australian GST or employment law: Yes

Which AI provides transparency citations linking to source documents: Google Gemini

Is Gemini's citation feature useful for regulated Australian sectors: Yes

Which Australian sectors benefit most from Copilot's compliance features: Healthcare, finance, legal, and government

Is it safe to enter client data into a free AI tier: No

Is it safe to enter staff data into a free AI tier: No

Which law governs Australian business data privacy obligations: Privacy Act 1988

What are the key Australian privacy rules for businesses: The Australian Privacy Principles

Can free AI tiers use your prompts to train their models: Yes, on consumer free tiers

Which Copilot tier respects Microsoft 365 tenant permissions and audit controls: Microsoft 365 Copilot business tier

Does Microsoft Copilot support IRAP-assessed services: Yes

Does Microsoft Copilot summarise Teams meetings: Yes

Does Microsoft Copilot draft Outlook emails: Yes

Does Microsoft Copilot build Excel formulas: Yes

Does Google Gemini have a side panel in Gmail: Yes

Does Google Gemini support "Help Me Write" in Google Docs: Yes

Does Google Gemini provide automatic meeting notes in Google Meet: Yes

Which AI is best for businesses using Xero, Slack, Canva, or Shopify: ChatGPT

Is ChatGPT embedded in Microsoft Office applications: No

Is choosing the wrong AI tool permanent: No, all platforms offer monthly billing and free trials

What is the recommended trial period before expanding AI use: 30 days

What is a good first task for AI adoption in an Australian SME: Email drafting, meeting summaries, or content creation

Did the ACCC take action against Microsoft regarding Copilot: Yes, in late 2025

What did the ACCC allege against Microsoft: That bundling Copilot into rising Office 365 prices misled users

How many Australian users were affected by the ACCC Microsoft case: Approximately 2.7 million

Where is ChatGPT Enterprise inference data processed by default: In the United States

Is ChatGPT Enterprise data residency the same as inference processing location: No, they are separate

Which AI is described as a blank-canvas tool: ChatGPT

Which AI is described as a power tool set built into your existing workshop: Microsoft Copilot

Does Gemini inherit existing Google Workspace data governance controls: Yes

Is Google Gemini available in Google Workspace Business Starter plans: Yes, as of 17 March 2025

What is the Google Workspace Business Starter monthly price in AUD: AU$11.80 per user per month

What is the Google Workspace Business Starter annual price in AUD: AU$9.90 per user per month (ex-GST)

Label Facts Summary

Disclaimer: All facts and statements below are general product information sourced from publicly available provider documentation and third-party reporting; pricing, features, and policies are subject to change — always verify current details on each provider's official Australian pricing page before making purchasing decisions.

Verified Label Facts

ChatGPT (OpenAI)

Made by: OpenAI
Free tier: Available (limited)
Paid individual plan: Approximately AUD $32/user/month (Plus)
Enterprise plan: Contact sales for pricing
Australian data residency: Available at enterprise tier
Model training on enterprise data: Off by default for ChatGPT Enterprise, ChatGPT Business, ChatGPT Edu, ChatGPT for Healthcare, ChatGPT for Teachers, and API platform
Inference processing default location: United States
Data residency coverage: Europe, United Kingdom, United States, Canada, Japan, South Korea, Singapore, India, Australia, and United Arab Emirates
Underlying technology: OpenAI models

Microsoft Copilot (Microsoft)

Made by: Microsoft
Underlying technology: Built on OpenAI's technology
Free tier: Available (basic)
Copilot Pro: Approximately AUD $32/user/month
Microsoft 365 Copilot business add-on: Approximately AUD $40–50/user/month total (requires existing eligible Microsoft 365 subscription)
Australian data centres: Yes
Compliance certifications: ISO, SOC, IRAP-assessed services
Operates within: Microsoft 365 trust boundary
Respects: Tenant permissions, Purview labels/IRM, audit controls
Integrated applications: Outlook, Word, Excel, PowerPoint, Teams, SharePoint, OneDrive
Capabilities: Summarises Teams meetings, drafts Outlook emails, builds Excel formulas
Requires existing Microsoft 365 subscription: Yes
ACCC proceedings: In late 2025, the ACCC sued Microsoft alleging bundling Copilot into rising Office 365 prices misled approximately 2.7 million users

Google Gemini (Google)

Made by: Google
Free tier: Available via Google account
Context window: Over 1 million tokens
Does not use Workspace content to train models for other customers: Confirmed
Integrated applications: Gmail, Docs, Sheets, Drive, Meet
Features: Gemini Side Panel in Gmail, Docs, Sheets, Drive; "Help Me Write" in Gmail and Docs; automatic meeting note-taking in Meet
Gemini included in all Google Workspace Business and Enterprise plans: From 15 January 2025
Gemini available in Google Workspace Business Starter: From 17 March 2025
Google Workspace pricing increase on adding Gemini: 15–20%
Google Workspace Business Starter: AU$11.80/user/month or AU$9.90/user/month (ex-GST, annual)
Google Workspace Business Standard: AU$23.60/user/month or AU$19.80/user/month (ex-GST, annual)
Google Workspace Business Plus: Approximately AUD $30.90/user/month (ex-GST)
GST: Applies to most plans
Inherits existing Google Workspace data governance and DLP controls: Yes

Regulatory Context

Governing Australian privacy legislation: Privacy Act 1988
Applicable privacy rules: Australian Privacy Principles

General Product Claims

ChatGPT described as a "versatile conversational AI" excelling at drafting, brainstorming, and handling a wide range of queries
ChatGPT characterised as a "blank-canvas tool" and "Swiss Army knife" for maximum flexibility
ChatGPT described as the most platform-agnostic of the three tools
ChatGPT stated to lead on structure, clear headings, word length, and readability in structured content generation
ChatGPT described as the best starting point for businesses using mixed tool stacks (e.g., Xero, Slack, Canva, Shopify)
Microsoft Copilot described as "a power tool set built directly into your workshop"
Microsoft Copilot characterised as having the strongest compliance posture for regulated Australian industries
Microsoft Copilot described as offering enterprise-friendly AI that "just works" if on Microsoft's clouds and apps
Microsoft Copilot described as the clear winner for corporate cross-referencing across Microsoft 365
Google Gemini described as Google's "most advanced AI model" and a "significant leap in multimodal capabilities"
Google Gemini stated to lead in transparency citations linking to specific source documents
Google Gemini described as the standout for deep, information-dense research
Google Gemini described as offering the best AUD value for Google Workspace users
Google Gemini described as the lowest-friction AI adoption path for Australian SMEs on Google Workspace
Claim that one hour per day per person in productivity savings can justify AUD $40–50/user/month Copilot licence
Recommendation that businesses should not enter identifiable customer or staff data into free AI tools
Recommendation that all regulatory or compliance AI output be verified by a qualified Australian professional
Recommendation to trial AI tools for 30 days on one specific task before expanding use
Claim that choosing the wrong AI tool is recoverable, but not adopting AI while competitors do is the greater risk
All three tools described as having been trained on predominantly US-centric data
All three tools stated to be capable of producing errors on Australian GST obligations, employment law, and state-specific regulations