Is ChatGPT safe for business use?

ChatGPT is safe for business use if you use the correct plan. The free and Plus plans (chatgpt.com) use your conversations to train future models by default, which is a problem for confidential data. The ChatGPT Team and Enterprise plans turn off training on your data and add admin controls, audit logs, and a data processing agreement. OpenAI also offers the API separately, where your data is never used for training. Always check the data processing agreement before sharing client data, financial figures, or internal strategies.

How does Microsoft 365 Copilot differ from ChatGPT?

Microsoft 365 Copilot is embedded directly in Word, Excel, PowerPoint, Outlook, and Teams, so it can read and edit your actual documents and emails rather than working in a separate chat window. It uses the same underlying GPT-4 model as ChatGPT but applies it to your Microsoft 365 data. The key advantage is context: Copilot can summarize a long email thread, draft a reply, and update a linked spreadsheet without you copying and pasting anything. The downside is cost: Microsoft 365 Copilot is priced at around 30 euros per user per month on top of your existing Microsoft 365 subscription.

Which AI tool is best for writing in a specific style?

Claude (by Anthropic) consistently scores well in tests for following nuanced style instructions, particularly for longer documents. Its context window of 200,000 tokens means you can paste in a large style guide plus a full draft in a single prompt, which is hard to do with tools that have smaller context limits. For teams that primarily need help with email, ChatGPT and Gemini are both capable and well-suited for shorter writing tasks. If you are already using Google Workspace, Gemini's integration in Gmail and Docs makes it the most practical choice without additional tooling.

Comparing AI Tools for Business Use

ChatGPT, Claude, Gemini, Copilot: which AI tool fits your business best? A practical comparison on price, strengths, and privacy.

Why the Choice Matters More Than You Think

Picking an AI tool is not just a matter of preference. Pricing, data privacy, and integration with your existing software all vary significantly between platforms. On the free tier of most tools, your conversations may be used to train future models, which is a problem if your team discusses client data or internal financials. Understanding these differences upfront saves you from switching tools six months in.

ChatGPT: The Versatile All-Rounder

ChatGPT from OpenAI is the most widely used AI tool for good reason. It handles an enormous range of tasks, from drafting emails and summarizing documents to writing code and generating images via DALL-E. The plugin and GPT Store ecosystem means you can extend it with specialized tools for specific workflows.

The main caveat for businesses is privacy. The free and Plus plans allow OpenAI to use your conversations for model training by default. If you share confidential data, you need the Team plan (roughly 25 euros per user per month) or Enterprise, both of which disable training on your data and add admin controls. For a more detailed head-to-head, see the ChatGPT vs Claude comparison.

Claude: Best for Long Documents and Precise Instructions

Claude by Anthropic stands out for two things: its 200,000-token context window and its accuracy on tasks that require careful instruction-following. You can paste in an entire contract, policy document, or research report and ask detailed questions about it without hitting context limits that truncate the input.

Claude tends to be more conservative than ChatGPT, meaning it is less likely to confidently produce incorrect information, though it may also decline to speculate when other tools would push through. Its main weaknesses are a smaller plugin ecosystem and no real-time web search on the standard plan.

Gemini: Google Workspace’s Native AI

Google’s Gemini is the natural choice if your team runs on Google Workspace. It integrates directly into Gmail, Docs, Sheets, and Meet, letting you summarize email threads, draft responses, and create content without switching between tabs. Gemini Advanced includes live web search, which means its responses draw on current information rather than a fixed training cutoff.

The trade-off is consistency on complex reasoning tasks. Gemini performs well on everyday writing and research, but in head-to-head tests on nuanced analytical tasks it can produce more variable results than Claude or GPT-4.

Microsoft 365 Copilot: Built Into Your Office Suite

Microsoft 365 Copilot takes a different approach. Rather than living in a separate chat interface, it is embedded inside Word, Excel, PowerPoint, Outlook, and Teams. This means it can read your actual files and email threads, not just content you paste in manually.

The practical value is high for teams already paying for Microsoft 365: Copilot can turn meeting notes into a formatted summary, rewrite a slide deck, or extract key figures from a spreadsheet in seconds. The downside is the price, roughly 30 euros per user per month on top of your existing subscription, which makes it harder to justify for small teams.

Which Tool Should You Choose?

Tool	Best for	Rough cost
ChatGPT Team	General use, varied tasks	~25 EUR/user/month
Claude Pro	Document analysis, precise writing	~18 EUR/user/month
Gemini Advanced	Google Workspace teams	~22 EUR/user/month
Microsoft 365 Copilot	Microsoft 365 teams	~30 EUR/user/month (add-on)

If you are not yet committed to any platform, start with ChatGPT Team or Claude Pro. Both offer strong general capabilities and clear business privacy terms. If your team already uses Microsoft 365 heavily and handles a lot of document-based work, Copilot’s embedded experience often justifies the extra cost.

Our tip: Before paying for any tool, run a two-week free trial with the actual tasks your team does daily. Generic benchmarks rarely predict whether a tool will fit your specific workflow. Test it on your real emails, your real reports, and your real edge cases.