Choose your AI assistant: ChatGPT, Claude, Gemini or Microsoft Copilot

By the end of this guide, you know which AI assistant fits your business, which plan you need and what it costs in CHF. Time needed: 10 minutes to read, 30 minutes to try two of them.

All four write emails, summarise documents, translate and work with spreadsheets. They differ in where they live, what they cost and where your data goes. For a team, use a business plan: you control who uses it, you get a business contract, and your data isn’t used for training by default.

The comparison

Prices per user per month, from the vendors’ pages. CHF figures marked ≈ are approximate, converted at about USD 1 = CHF 0.83 (ECB).

	ChatGPT (OpenAI)	Claude (Anthropic)	Gemini (Google)	Microsoft Copilot
Free version	Yes	Yes	Yes	Copilot Chat, included with Microsoft 365 Business Basic, Standard and Premium
Personal paid plan	Plus: USD 20 (≈ CHF 17)	Pro: USD 20 monthly, or USD 17 a month billed yearly (≈ CHF 17 / 14)	Google AI Pro: USD 19.99 (≈ CHF 17)	Microsoft 365 Single with Copilot: CHF 9.95, or CHF 99.95 a year
Business plan	Business: USD 25 monthly, USD 20 yearly (≈ CHF 21 / 17). Minimum 2 users	Team: USD 25 monthly, USD 20 yearly (≈ CHF 21 / 17). 2 to 150 users	Included in Google Workspace Business Standard: USD 14 (≈ CHF 12), with email and storage	Copilot Business add-on: CHF 14.57 yearly, CHF 20.40 monthly. Up to 300 users
Trains on business data?	No	No (by default)	No (without your permission)	No
Where data is stored	No choice on Business. Europe (EEA and Switzerland) possible for new Enterprise and Edu customers	United States	Business Standard and above: Europe or US, chosen by your admin. No Swiss option	Microsoft 365 set up in Switzerland: stored in Switzerland, including Copilot. Inside Microsoft’s EU Data Boundary
German, French, Italian	Yes	Yes	Yes	Yes
Lives in	Its own app	Its own app	Gmail, Docs, Sheets, Meet	Outlook, Word, Excel, Teams
Reads your Google files	Google Drive and Gmail, depending on plan and region	Google Drive, Gmail and Calendar, all plans	Built in (Drive, Gmail)	Upload the file
Reads your Microsoft files	SharePoint, Outlook and Teams, depending on plan and region	Read-only, Team and Enterprise	Upload the file	Built in. Your work files need a Copilot licence or pay-per-use
Repeats a job your way	Skills (Business and up), Projects	Skills, Projects	Gems; skills on personal accounts as they roll out	Agents

VAT: Microsoft’s and Anthropic’s prices exclude tax, so expect Swiss VAT of 8.1% on top (ESTV). OpenAI’s and Google’s pages don’t say. Check the final price at checkout.

Sources for “Where data is stored” and the last three rows: data location (OpenAI, Anthropic, Google, Microsoft); files (OpenAI, Anthropic: Google, Anthropic: Microsoft, Microsoft); repeat a job (Install a BizzyAI skill).

Swiss German: Microsoft and Google don’t list Swiss German as supported (Microsoft, Google). Write to all four in Standard German.

Pick this if

You use Microsoft 365 (Outlook, Word, Teams): start with Copilot Chat, already in your plan at no extra cost (Microsoft Learn). Add Copilot Business for people who need Copilot to work with their emails, calendar and files.
You use Google Workspace (Gmail, Google Docs): use Gemini. Business Standard and higher include it in Gmail, Docs, Sheets, Meet and Drive. Business Starter has only basic access (Google Workspace pricing).
You use Google Workspace but prefer ChatGPT or Claude: both can read Google Drive and Gmail. Claude offers this on every plan (Claude Help). In ChatGPT it depends on your plan and region (OpenAI Help).
You use Microsoft 365 but prefer ChatGPT or Claude: ChatGPT can read SharePoint, Outlook and Teams. Claude can on Team or Enterprise, after a one-off setup by whoever manages your Microsoft 365 (Claude Help).
Your team already uses ChatGPT privately: move them to ChatGPT Business. Same app, but you control the accounts and your data isn’t used for training.
You want to install BizzyAI skills on a personal plan: choose Claude Pro. ChatGPT offers skills only on Business, Enterprise and Edu (OpenAI Help). For a team, Claude Team and ChatGPT Business both support skills.
Data must stay in Switzerland: look at the Swiss options below first.
You’re on your own and want to start for free: use the free version of any of them for green data only (see What you can safely share with AI). Switch off training first.

How to try two before you buy (30 minutes)

Choose two candidates from the “Pick this if” list.
Sign in with a free or trial account. Microsoft offers a free trial of Copilot Business (Microsoft Switzerland). Google offers a 14-day trial of Google Workspace, which includes Gemini (Google Workspace pricing). With Microsoft 365 Business, open Copilot Chat at microsoft365.com/chat with your work account.

Example: Claude’s pricing page at claude.com/pricing. Start with the Free plan. Prices are in US dollars and exclude tax.
Give both the same three real tasks, word for word, with no personal data:

Task 1: Reply in French, “vous” form, under 80 words, to this German customer email. Use only the facts in it. [paste email] Task 2: Summarise the attached supplier offer in five bullet points: price in CHF, VAT, contract length, notice period, anything unusual. [attach offer] Task 3: Turn these meeting notes into an action list: who, what, by when (DD.MM.YYYY). [paste notes]

Attach the offer from OneDrive in Copilot or Google Drive in Gemini, or upload it in ChatGPT or Claude (see Ask AI well).
Compare the answers with the check in Check AI answers before you use them.
Pick one. Buy business seats only for people who will use it every week. Then install a skill and shape it to your business (Customise a skill).

For Swiss businesses

Infomaniak Euria (Geneva): Infomaniak says Euria is “hosted exclusively in Switzerland” and that your data is “neither saved nor used to train AI”. It can be tried for free and is part of kSuite Pro for businesses (Infomaniak).
Proton Lumo (Geneva), with the Swiss model Apertus: Lumo is Proton’s AI assistant. Proton says Lumo for Business never uses your data to train AI (Proton). Since 17 September 2026, Lumo offers Apertus 1.5, the open model built by EPFL, ETH Zurich and the Swiss National Supercomputing Centre (ETH Zurich).
Microsoft 365 set up in Switzerland: if your Microsoft 365 account was set up in Switzerland, Microsoft commits to store email, SharePoint, OneDrive, Teams and Microsoft 365 Copilot data in Switzerland (Microsoft Learn). Switzerland is also inside Microsoft’s EU Data Boundary (Microsoft Learn).
Google Workspace: on Business Standard and above, your admin can choose to store data, including Gemini chats, in Europe or the US, not Switzerland. Choosing where data is processed needs Enterprise Plus or Frontline Plus (Google Workspace Admin Help, editions).
ChatGPT with European storage: only for new ChatGPT Enterprise customers, not Business. Europe here covers the EEA and Switzerland (OpenAI Help).

Sources

OpenAI, What is ChatGPT Plus: https://help.openai.com/en/articles/6950777-what-is-chatgpt-plus
OpenAI, ChatGPT Business overview: https://help.openai.com/en/articles/8792828-chatgpt-business-overview
OpenAI, Data residency: https://help.openai.com/en/articles/9903489
OpenAI, Skills in ChatGPT: https://help.openai.com/en/articles/20001066-skills-in-chatgpt
OpenAI, Language settings: https://help.openai.com/en/articles/8357869-how-to-change-your-language-setting-in-chatgpt
Anthropic, Plans and pricing: https://claude.com/pricing
Anthropic Privacy Center, server locations: https://privacy.claude.com/en/articles/7996890-where-are-your-servers-located-do-you-host-your-models-on-eu-servers
Anthropic, Use Claude in your preferred language: https://support.claude.com/en/articles/10769299-how-to-use-claude-in-your-preferred-language
Google, Gemini subscriptions: https://gemini.google/subscriptions/
Google Workspace blog, Business Standard price with Gemini (January 2025): https://workspace.google.com/blog/product-announcements/empowering-businesses-with-AI
Google Workspace pricing (Switzerland): https://workspace.google.com/intl/de_ch/pricing.html
Google Workspace pricing and trial: https://workspace.google.com/intl/en/pricing.html
Microsoft Learn, Data residency commitments in the Product Terms: https://learn.microsoft.com/en-us/microsoft-365/enterprise/m365-dr-product-terms-dr?view=o365-worldwide
Microsoft Learn, Agents in Microsoft 365 Copilot Chat: https://learn.microsoft.com/en-us/Copilot/agents
OpenAI, Connected apps in ChatGPT: https://help.openai.com/en/articles/11487775-connected-apps-in-chatgpt
Anthropic, Use Google Workspace connectors: https://support.claude.com/en/articles/10166901-use-google-workspace-connectors
Anthropic, Microsoft 365 connector: https://support.claude.com/en/articles/12542951-enabling-and-using-the-microsoft-365-connector
Google, Generative AI in Google Workspace Privacy Hub: https://knowledge.workspace.google.com/admin/generative-ai/generative-ai-in-google-workspace-privacy-hub
Google Workspace Admin Help, Data covered by data regions: https://knowledge.workspace.google.com/admin/compliance/data-covered-by-data-regions?hl=en
Google, Gemini languages and countries: https://support.google.com/gemini/answer/13575153
Microsoft Switzerland, Microsoft 365 Copilot Business: https://www.microsoft.com/de-ch/microsoft-365/copilot/business
Microsoft Switzerland, Microsoft 365 plans: https://www.microsoft.com/de-ch/microsoft-365/buy/compare-all-microsoft-365-products
Microsoft Learn, Microsoft 365 Copilot Chat: https://learn.microsoft.com/en-us/copilot/manage
Microsoft Learn, Microsoft 365 Copilot privacy: https://learn.microsoft.com/en-us/copilot/microsoft-365/microsoft-365-copilot-privacy
Microsoft Learn, EU Data Boundary: https://learn.microsoft.com/privacy/eudb/eu-data-boundary-learn
Microsoft Support, Copilot supported languages: https://support.microsoft.com/en-us/office/microsoft-copilot-supported-languages-94518d61-644b-4118-9492-617eea4801d8
Infomaniak, Euria: https://www.infomaniak.com/en/euria
Proton, Lumo for Business: https://proton.me/business/lumo
ETH Zurich, “Apertus partners with Proton’s Lumo AI assistant”, 17 September 2026: https://ethz.ch/en/news-and-events/eth-news/news/2026/09/apertus-partners-with-protons-lumo-ai-assistant.html
ECB euro reference exchange rates: https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html
Swiss Federal Tax Administration (ESTV), VAT rates: https://www.estv.admin.ch/de/mwst-steuersaetze-schweiz