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Deploy AI chat securely across your organization

The private ChatGPT alternative: EU‑hosted, with your data and permissions — free model choice, per seat or at one flat price.

Schedule a demo →

Why companies choose onAI

Private, secure, and on your servers

Your data remains protected and under your control—no leakage to external systems. On request, we host your onAI system on‑premises or in your own cloud.

AI‑compliant usage for your business

Are employees using ChatGPT via private accounts with your company data? Provide a fully‑featured, user‑friendly alternative that complies with GDPR and the EU AI Act.

No AI training on your data

We enable secure, privacy‑compliant work even with the most sensitive data. Your data is neither sold nor used for training.

Case Study

Manor × onAI

Secure AI for 6,800 employees: how Manor established a privacy‑compliant alternative to ChatGPT across the company with onAI.

Thanks to the latest AI capabilities in onAI, our employees are more productive and use them securely and compliantly — at an affordable fixed price.
- Roberto Fedele, CIO Manor
  • GDPR/AI Act compliant
  • 6,800 employees
  • Microsoft/Google integrated
  • Fixed price & scalable
Read case study → Get in touch
Manor Logo
Use case

A company‑wide AI portal that gives all employees immediate access to the latest language and image models—seamlessly integrated and secure.

Challenge

Avoid shadow AI, ensure data protection and compliance, keep costs manageable for 6,800 users, and maintain central control.

Result

More productive teams, secure usage across all departments, and flexible extensibility without vendor lock‑in.

The full‑featured ChatGPT
replacement for your business

The days of using ChatGPT insecurely at work are over. With onAI, your employees get the full functionality of modern AI chat—just as they’re used to.

onAI chat answering a question with web search sources

Answers from your Microsoft 365, live

Ask about a contract, last week’s email thread or a decision from Teams. onAI searches Microsoft 365 as the person asking and cites every source.

See it in a demo
Mistral Large

What did we agree with Brunner Logistics on the November deliveries? Is anything still open?

Mistral Large 09:41

Two partial deliveries: 400 units on 12 November, the rest on 26 November. 1

The framework agreement allows up to five working days’ delay without a penalty. 2

Still open: on Tuesday Lara Meier asked Brunner to confirm the pallet labels. No reply yet. 3

  1. 1 Re: Delivery schedule November
  2. 2 Framework agreement Brunner 2026.docx
  3. 3 Chat with Lara Meier
Example conversation in onAI. The answer draws on an email, a SharePoint document and a Teams chat, and cites all three.

Where onAI looks

  • SharePoint and OneDrive files
  • SharePoint pages and lists
  • Outlook mail and attachments
  • Calendar
  • Teams chats
  • OneNote
  • To Do and Planner tasks
  • Colleague directory

Your admin can add

  • Teams channels
  • Teams meeting transcripts
  • Copilot meeting notes

Already pay for Copilot licences?

Once your admin switches it on, people with a Microsoft 365 Copilot licence also get Copilot’s search by meaning across SharePoint and OneDrive, plus Copilot’s meeting notes, right inside onAI. onAI uses no pay-as-you-go Copilot APIs, so it adds no metered Microsoft charges.

Your Microsoft permissions stay in charge

  • People see only what they already can

    onAI searches as the signed-in person. Microsoft checks every request against that person’s existing access, so onAI never opens a folder they couldn’t.

  • Nothing copied, nothing indexed

    There is no second copy of your library and no sync job. onAI reads items only when someone asks, and what it read stays in that person’s chat, like the rest of the conversation.

  • Read-only

    onAI can’t send, change or delete anything in Microsoft 365. The permissions it holds only allow reading.

  • Your admin picks the models

    Admins choose which AI models may receive Microsoft 365 content, and onAI enforces that list on the server in every chat. With the EU-only AI tier, that content is processed in Europe only.

  • Sources on every answer

    Numbered citations open the original email, file or chat. An activity line shows what onAI searched and read, so checking an answer takes seconds.

  • Personal accounts work too

    On a personal onAI account, freelancers can connect outlook.com, a personal OneDrive, calendar, OneNote and To Do. They approve it themselves, no IT department needed.

For IT: one approval, no app registration

onAI brings its own Microsoft app. You don’t register anything, store a client secret or rotate certificates. You read one page and approve.

  1. Your onAI admin sends you the approval link from onAI settings.

  2. You sign in as a Microsoft administrator and read one page: what onAI can and can’t do, and every permission it asks for.

  3. You approve. Colleagues connect with one click, or automatically the next time they sign in with Microsoft.

Book a technical call

Approve onAI for Acme AG

  • Files
  • Mail
  • Calendar
  • Teams chats
  • OneNote
  • Tasks
  • People

What onAI can and can’t do

  • Read-only. onAI can never create, change, send or delete anything.
  • Delegated only. onAI sees exactly what the signed-in person can already open.
  • No copy of your data. Nothing is indexed or synchronized.
  • Content is sent only to the AI models your onAI admin allowed.
  • Every user can disconnect at any time. You can revoke the approval in Entra.
The approval page your IT administrator sees before approving onAI.
Delegated access only
No application permissions. onAI acts as the signed-in person, with no background access and no access to other mailboxes.
Only real admins can approve
Before onAI links your directory, it checks the administrator role in Microsoft’s signed sign-in token.
Teams channels stay off
Until you switch them on. That sends IT a separate approval request for that one permission.
Encrypted and audited
Connection tokens are stored encrypted. With audit logging on, every search and every item read is recorded, never the document contents.
Revocable at any time
Users disconnect in onAI. You revoke the approval in the Microsoft Entra admin center under Enterprise apps.
Every permission onAI can request
openid, profile, email, User.Read, offline_access Sign-in, keeping the connection alive On
Files.Read.All, Sites.Read.All SharePoint and OneDrive files, pages and lists On
Mail.Read Outlook mail and attachments On
Calendars.Read Calendar On
Chat.Read Teams chats On
Notes.Read.All OneNote On
Tasks.Read To Do and Planner On
People.Read Colleague directory On
ChannelMessage.Read.All Teams channels Off
OnlineMeetings.Read, OnlineMeetingTranscript.Read.All Teams meeting transcripts Off
OnlineMeetings.Read, OnlineMeetingAiInsight.Read.All Copilot meeting notes (Copilot licence) Off

All permissions are delegated and read-only. Your organization’s Microsoft consent policy decides who may approve. Personal accounts use a smaller set: Files.Read, Mail.Read, Calendars.Read, Notes.Read and Tasks.Read.

onAI for Outlook and Excel Coming soon

Summaries, drafts and spreadsheet help inside Outlook and Excel. It runs on the onAI account your team already uses, with the models your admin allows.

Microsoft 365 Copilot is licensed per user on top of Microsoft 365. The onAI add-in needs no Copilot licence.

In Outlook

  • Summarize a thread in one click
  • Draft replies in the right tone, then refine them by typing
  • A prioritized inbox: needs attention, can wait, FYI
  • Meeting prep and recaps of Teams meetings
  • Find a time when everyone is free

In Excel

  • Ask about the selection, a sheet or a table
  • Write, explain and fix formulas
  • Charts, PivotTables and clean-ups as a plan you review before anything changes
  • Worksheet functions such as =ONAI.PROMPT() that translate, classify and extract in cells
Ask about early access
Preview of the onAI task pane in Outlook and an onAI worksheet function in Excel.

Ready for the whole company from day one

The details your IT team asks about, and the ones your colleagues notice every day.

Every leading model in one interface

Claude, GPT, Gemini, Grok, Mistral and more. Your admins decide which models your organisation may use, and employees pick the right one for each task.

Web search with sources

Answers on current topics link to the pages they are based on, so anyone can check the facts.

See what the AI is doing

Every step shows up as it happens: which searches ran and which documents were read before the answer.

Sign in with your company account

Single sign-on with Microsoft Entra ID, Google, any OpenID Connect provider or LDAP. No extra passwords for your employees.

Your brand, your domain

Run onAI on your own domain with your logo for light and dark mode, your app icon and your favicon. Employees see your company's AI assistant.

  • Organisation administration

    Owner, admin and member roles. Invite colleagues by email and use groups to control who gets which feature.

  • Knowledge bases and PDF export

    Put manuals, policies and contracts into knowledge bases the AI answers from. Export any chat as a PDF to file or share it.

  • Ready for your security review

    Your data never leaves the secured EU server. Each organisation's data is kept strictly separate, access tokens are stored encrypted, and admin actions are recorded in an audit log. We walk your IT security team through the details.

Every leading image model in one studio

Send one prompt to up to three models and compare the results side by side: GPT Image, Nano Banana Pro, Imagen 4 and FLUX.3 from Black Forest Labs in Germany. The cost per image is shown before you generate, and you may use the images commercially.

Models

3 active

  • Nano Banana ProGoogle · Image editing€0.12
  • GPT ImageOpenAI · Image editing€0.04
  • FLUX.3Black Forest Labs€0.05
  • Imagen 4 UltraGoogle€0.06
Estimated provider cost €0.21

Your generations

Two colleagues reviewing a campaign draft on a laptop, bright office, natural light, editorial photo

Just now · 3 models · 1:1

  • Result from Nano Banana Pro: two colleagues at a laptop in a bright office

    Nano Banana Pro

    9.8 s · €0.12

  • Result from GPT Image: two colleagues smiling at a laptop

    GPT Image

    14.2 s · €0.04

  • Result from FLUX.3: two colleagues reviewing a draft on a laptop in a workshop office

    FLUX.3

    Germany

  • Compare side by side

    Same prompt, same settings, up to three models at once. Your team keeps the best result and learns which model suits which job.

  • Edit in plain words

    Start from an upload or an earlier result and describe the change: another background, a new colour scheme, a different format.

  • Every image saved

    Each generation is kept with its prompt, model and cost. Search it, reuse the settings, download as PNG, JPG or WebP.

  • Run by your admins

    Admins choose the models and who may use them, and can have personal data removed from prompts before they reach a provider.

Coming soonVideo models are coming to Image Studio.

Translations that use your company’s own terms

The translator runs on DeepL, the translation engine from Germany. Paste text or upload a Word file or PDF. It comes back with the layout intact, using your organisation’s glossaries and the tone you choose.

  • Whole documents, layout intact

    Upload a Word file or PDF and download the translation in the same format, ready to send.

  • Your glossaries

    Define once how product names and technical terms are translated and share the glossary across your organisation. It works for text and whole documents.

  • Formal or informal, in the right tone

    Choose formal or informal address, then rewrite the result as simple, professional, casual or academic.

  • Help with every word

    Click any word for alternatives with usage notes or a short dictionary entry. Read both texts aloud to check them.

Included in onAI. Admins decide which groups can use it.

Original text

Thanks for your order. Your delivery will arrive on Thursday. If you have any questions, please contact your account manager directly.

Translation

Vielen Dank für Ihre Bestellung. Ihre Lieferung trifft am Donnerstag ein. Wenn Sie Fragen haben, wenden Sie sich bitte direkt an Ihren Kundenbetreuer.

From your glossary

The platform, and the team to roll it out

onAI Platform

Four modules that build on each other. Start with the tools your teams use every day, then add your company knowledge, your choice of models and your own agents.

  • AI Tools Chat · Translator · Image Studio

    The everyday workspace for every employee, right in the browser with nothing to install.

  • Context Vault Knowledge bases · Microsoft 365

    Answers from your company knowledge: knowledge bases over your documents, plus live search in Microsoft 365.

  • Agent Platform Custom agents · Sources · Sharing

    Build your own agents in self-service: set the instructions, pick the model and add knowledge collections such as tax, VAT or rulings. Share them with groups. Answers cite the sources they used.

  • AI Gateway Model choice · Allowlist · Usage limits

    One controlled access point to every model. Choose which models are allowed, set usage limits for the organisation and per person, and keep costs in view.

    Connected models

    • Claude
    • GPT
    • Gemini
    • Grok
    • Mistral
    • Your own models

Open interfaces

Connect any external system or data source yourself. Or have onAI or a partner build the connection as a project.

REST API · Webhooks · OpenAPI tool servers · Custom tools · MCP (coming soon)

Automation platform Coming soon

onAI's own workflow engine is in the works. Until then, n8n connects to onAI, run by onAI as a service or by you or a partner. On request, onAI builds the workflows for you.

Managed service

onAI takes care of operation, maintenance, updates, new models and backups.

AI Trainings

We enable your teams to use AI safely and effectively: practical, easy to grasp, and immediately applicable. In focused sessions we teach essential prompt techniques, the right tools, and best practices, tailored to Marketing, HR, and IT.

AI Workshops

Together, we identify the most valuable use cases for your business. With clear scoring across impact, feasibility, data readiness, and risk, we create a prioritized roadmap, including a realistic ROI outlook.

Custom AI Agent Development

We build custom AI workflows and agents for your processes, seamlessly integrated with your existing systems. From implementation to operations and monitoring, including SLAs, you get everything end to end.

Get in touch

European from the contract down to the DNS

You sign with Telesoft AG in Switzerland, so Swiss data protection law and the GDPR both apply. Chats, files and accounts sit in European data centres, and so do the CDN and DNS in front of them. Admins can't read employees' chats, Microsoft 365 is read live and never copied, and none of it trains an AI model.

Your company

Your team

Sign in with Microsoft Entra ID, Google, OIDC or LDAP

Microsoft 365

Files, mail, calendar and Teams, with each person's own permissions

Read live. Nothing copied.

Europe

Your onAI instance

onAI
  • Chats and accounts
  • Files, encrypted
  • CDN and DNS
  • Audit log

Where it runs

  • EU cloud
  • Dedicated in Switzerland or Germany
  • On your own servers

External services, filtered

AI models

Mistral and other European options, or your own models

No training on your data

Web search and image generation

Queries go out without names or confidential details

Personal data removed first

Translation

DeepL, based in Germany

Where your data lives

  • Swiss contract, two laws. Your contracting party is Telesoft AG in Switzerland. The Swiss DSG and the GDPR both apply.
  • European infrastructure, end to end. The application, file storage, CDN and DNS all run in Europe.
  • Your own instance if you want one. Dedicated in Switzerland or Germany, or on-premises in your data centre.

Who can see it

  • Not your admins. Administrators manage users and models. We set up every onAI instance so that they can't open employees' chats.
  • Microsoft 365 stays in Microsoft 365. onAI reads it live and read-only, with each person's own permissions. Your admins decide which AI models may see it.
  • Strict tenant separation. Every record belongs to exactly one organisation. Files and access tokens are encrypted, and an audit log records sensitive actions.

What leaves, and how

  • No training on your data. Prompts, files and answers are never used to train AI models.
  • Personal data stays out of search. Names and confidential details are removed before a query reaches web search or an image generator.
  • European AI, or your own. Mistral, FLUX and DeepL are built in. On a dedicated or on-premises instance you can connect your own models.
  • EU-only processing on request. An optional tier keeps all AI processing in the EU, with zero data retention at the model provider.

Everything your data protection officer will ask for

  • Data processing agreement
  • Public list of subprocessors
  • GDPR deletion and retention periods
  • EU AI Act transparency labels
  • Interface in English and German
Request the DPA

How onAI compares

Side by side with the two tools most companies evaluate first. Every competitor cell is checked against the vendor's own documentation, with sources below.

Compare onAI with
onAI compared with Microsoft 365 Copilot and ChatGPT Business
onAI Microsoft 365 Copilot ChatGPT Business
Data protection and jurisdiction
Contracting party and law Swiss contract with Telesoft AG. Swiss DSG and GDPR. Microsoft Ireland, owned by a US parent company1 OpenAI Ireland, owned by a US parent company1
Where your data is stored Hosted in Europe, including storage, CDN and DNS. Dedicated instance in Switzerland or Germany. EU Data Boundary for EU customers2 No EU data residency on Business. It's for Enterprise and Edu only.3
Where the AI processes your prompts EU-only mode: chats go only to models running in European data centres. In the EU Data Boundary, except Anthropic models (off by default in the EU)2 No EU processing on Business. It's for Enterprise and Edu only.3
On-premises or your own instance Yes, in your data centre or as a dedicated single-tenant instance No, Microsoft cloud only No, OpenAI cloud only
European AI models Mistral (France) and FLUX by Black Forest Labs (Germany), next to the US models No, OpenAI and Anthropic models4 No, OpenAI models only
Microsoft 365 data Searched live and read-only with each user's own permissions. Nothing is copied. Native, with each user's Microsoft permissions Live apps for SharePoint and Teams, with each user's permissions5
Employee chats private from admins Yes. Admins can't open employee chats. No. Admins can search prompts and answers with Microsoft Purview.6 Partly. No admin export on Business. On Enterprise, owners can grant access through the Compliance API.6
Product
Choice of AI models Claude, GPT, Gemini, Mistral, Grok and more. Admins decide which ones are allowed. OpenAI and Anthropic models, picked by Microsoft4 OpenAI models only
White label Your domain, logo and icons No No
DeepL translator Built in. Whole documents with your glossaries, plus rewriting for tone and style. Through Copilot prompts, not DeepL Through chat prompts, not DeepL
Image generation Image Studio: several image models side by side, including FLUX from Germany Built in, with a model chosen by Microsoft Built in, OpenAI image model only
Price
Price model Per seat, or one flat price for the whole company €26.00 per user and month, on top of a qualifying Microsoft 365 licence7 $20 per user and month, at least 2 users7
Schedule a demo

Sources and notes

  1. 1 US companies can be required to hand over data under US law (CLOUD Act), including data stored in the EU. Microsoft and OpenAI contract with EU customers through Irish subsidiaries. US DOJ: CLOUD Act, OpenAI Services Agreement
  2. 2 Microsoft Copilot is an EU Data Boundary service. Anthropic models are excluded from it and switched off by default for EU customers. Microsoft Copilot privacy
  3. 3 OpenAI offers EU data residency and EU inference for ChatGPT Enterprise and Edu. Business is not listed. OpenAI data residency
  4. 4 Admins can switch Anthropic models on per user or group. Microsoft: AI subprocessors
  5. 5 OpenAI retired admin-managed sync connectors on 16 October 2026. The SharePoint and Teams apps search live. OpenAI: SharePoint app
  6. 6 Microsoft stores Copilot prompts and responses; admins can search them with Content search or Purview. OpenAI's Compliance API is for Enterprise and Edu. Microsoft Copilot privacy, OpenAI Compliance API
  7. 7 List prices excl. VAT. Copilot: annual billing, EUR. ChatGPT Business: annual billing, USD (USD 25 billed monthly). Microsoft Copilot Enterprise, Microsoft licence options, ChatGPT Business billing

Competitor information checked on 20 October 2026. Plans and features change; tell us if something is out of date.

Pay per seat, or one price for everyone

Start with one team and pay for the seats you use. For a company-wide rollout, one flat price covers every employee. Nobody has to share a licence or wait for one.

Per seat

For teams and pilot projects

€17 per user and month

Includes a €5 model budget per user and month.

  • Every AI model your admins allow
  • Image Studio and the DeepL translator
  • Answers from Microsoft 365, with each user's own permissions
  • Sign-in with Microsoft Entra ID or Google
  • Hosted in Europe
  • Add or remove seats every month
Start with your team

Flat price

For company-wide rollouts

Unlimited users

One fixed annual price, however many people use it.

  • Everything in Per seat, for every employee
  • Dedicated instance in Switzerland or Germany, or on-premises
  • White label with your domain, logo and icons
  • Your own models and inference servers
  • Single sign-on with Entra ID, Google, OIDC or LDAP
  • Onboarding, training and workshops for your teams
Request a quote

Which one costs less?

From about 50 users, the flat price usually beats paying per seat. We'll do the maths for your company.

Get a cost comparison

Usage journal and billing

  • Every AI request is logged in the usage journal, with the token counts the provider reports.
  • Your admins assign licences and can set optional limits per user.
  • With Per seat, usage beyond the included model budget is billed at actual consumption, with no minimum.
  • The bill is itemised by model and quantity, and you can check it at any time in the usage journal.

All prices excl. VAT.

A flexible platform and a partner with deep AI expertise

Telesoft AG brings years of AI experience together. Our team includes former Apple employees, CDOs of publicly listed companies, and serial founders.

Schedule a demo →

Frequently asked questions

Got questions? Here are the most important answers.

Our infrastructure is operated within the EU. On request, we provide dedicated instances in Switzerland, in Germany, or in your own data center.
A current browser and a corporate login are sufficient. For single sign-on we support Microsoft Entra ID, Google, any OpenID Connect provider and LDAP.
Microsoft 365 is searched live with each person's own permissions, as described above. Other sources such as Confluence or S3 connect through standardized connectors or our secure API. Access rights are preserved.
Yes. We continuously expand the feature set and always support the latest AI models.