Sovereign alternative to Microsoft Copilot:
which AI for your business?
Microsoft Copilot is natively integrated into Word, Excel, Outlook and Teams,an undeniable asset for office productivity. But when your needs go beyond the Office suite, with sensitive data and sovereignty requirements, other options exist.
This guide compares LetzAgents and Microsoft Copilot objectively, to help you choose the right solution for your professional context in Luxembourg and Europe. Copilot excels within the Microsoft 365 ecosystem. But when it comes to data sovereignty, deep business customisation or client-facing AI agents (chatbot, phone), the needs are different.
Presentation of both solutions
Microsoft Copilot
MicrosoftMicrosoft Copilot is an AI assistant built directly into the Microsoft 365 suite (Word, Excel, PowerPoint, Outlook, Teams). It relies on OpenAI's GPT-4 models deployed on Azure. Its main strength: it works where your teams already spend their day. Copilot can summarise emails, generate presentations, analyse Excel spreadsheets or draft documents,directly within Microsoft applications.
LetzAgents
LuxembourgLetzAgents is a private and sovereign AI solution, independent of any software ecosystem. Hosted exclusively in Europe on ISO 27001-certified servers, it creates a dedicated instance for your company, connected to all your internal documents via RAG technology. LetzAgents is not limited to one ecosystem: it ingests your PDFs, Word files, Excel files, audio files, web pages and databases, regardless of format or origin.
Integration and ecosystem
This is Copilot's major strength. The native integration into Word, Excel, PowerPoint, Outlook and Teams is a considerable advantage. No need to learn a new tool: Copilot appears directly in the applications your teams already use. The adoption curve is virtually zero. For companies heavily invested in Microsoft 365, it delivers immediate productivity gains on office tasks. The limitation: Copilot is locked into the Microsoft ecosystem. If your critical documents are in another system (ERP, NAS server, business software, specialised database), Copilot cannot access them. And it does not offer a client chatbot or phone agent.
LetzAgents does not have native integration into Office 365,that is a fact. It works via a dedicated web interface, a chatbot embeddable on your website, an AI phone agent, and an API. Its advantage: it is tied to no ecosystem. It ingests documents from any source and offers AI agents that Copilot does not cover (web chatbot, phone).
Copilot shines within the Microsoft 365 ecosystem. LetzAgents is ecosystem-agnostic and covers channels Copilot does not offer (client chatbot, phone agent).
Hosting and data sovereignty
Copilot runs on Azure. Microsoft offers datacentres in Europe and contractualises data residency. However, Microsoft remains a US company subject to the Cloud Act, which can theoretically compel Microsoft to hand over data stored abroad upon request from a US court. Moreover, Copilot queries are processed by OpenAI models via Azure OpenAI Service,the question of access to processing data remains complex.
The entire infrastructure (storage, processing, AI models) is hosted in Europe, operated by European entities. No dependency on any US company. Your instance is physically and logically isolated. For regulated professions in Luxembourg (fiduciaries, law firms, the financial sector), this independence eliminates any legal grey area.
LetzAgents guarantees complete sovereignty with zero Cloud Act exposure. Microsoft offers data residency in Europe but remains subject to US jurisdiction.
Customisation and knowledge base
Copilot accesses your Microsoft 365 tenant data (SharePoint, OneDrive, emails) via Microsoft Graph. This is effective for office tasks: summarising an email thread, creating a PowerPoint from a Word document, analysing a spreadsheet. But Copilot does not create a structured business knowledge base. It does not 'understand' your internal processes beyond what is in your M365 tenant.
LetzAgents builds a permanent knowledge base from all your documentation,all formats, all sources. Every answer cites its sources (document + page). An accounting firm can load its tax circulars, declaration templates, and case law. The AI becomes an expert in your business,not an office assistant.
Copilot is an excellent office assistant within M365. LetzAgents is a business expert trained on all your documentation.
AI agents and client channels
Copilot is an internal assistant. It helps your staff with daily tasks in Office 365. It does not offer a chatbot embeddable on your website for clients, nor an AI phone agent to handle incoming calls. If you need to automate client reception, Copilot is not designed for that.
LetzAgents offers a complete suite of AI agents, all connected to your knowledge base: an internal chat agent for your teams, a web chatbot embedded on your site for client support and appointment booking, and an AI phone agent that answers calls 24/7 in natural, multilingual voice. These agents share the same knowledge base.
LetzAgents covers both internal (team assistant) and external (client chatbot, phone agent) use cases,a scope Copilot does not cover.
Who is each solution for?
Microsoft Copilot is a good choice if:
- Your company makes intensive use of Microsoft 365 (Word, Excel, Teams, Outlook)
- Your needs are primarily office-related (drafting, summarising, spreadsheet analysis)
- You have no strict sovereignty requirements beyond standard GDPR
- You do not handle data subject to professional secrecy
- You do not need client-facing AI agents (chatbot, phone)
LetzAgents is designed for you if:
- You need an AI trained on your business expertise (not just your emails)
- Data sovereignty is critical (professional secrecy, regulation)
- You want a client chatbot or AI phone agent in addition to internal AI
- You are not exclusively dependent on Microsoft 365
- You are in Luxembourg and want local support in your language
3 reasons to choose LetzAgents over Microsoft Copilot
Break free from the Microsoft ecosystem without sacrificing AI power.
Free from the Microsoft ecosystem
Copilot depends on Azure, Microsoft 365 and American infrastructure. LetzAgents works independently of any vendor: ISO 27001 certified European hosting, dedicated instance, no data at Microsoft.
- No dependency on Microsoft or Azure
- Works with all your documents, not just Office
- Isolated instance, not an add-on in your M365 tenant
All your documents, not just Office 365
Copilot only sees your Microsoft 365 tenant. LetzAgents ingests all your documents,PDFs, scans, audio, websites,and builds a permanent knowledge base that cites its sources with every response.
Beyond office tools: your customers too
Copilot enhances Word, Excel and Teams. LetzAgents goes further with a customer chatbot embeddable on your site and an AI phone agent,channels that Microsoft does not cover.
LetzAgents vs Microsoft Copilot:
| Criteria | Microsoft Copilot | LetzAgents |
|---|---|---|
| Hosting | Azure (Microsoft, US) | Europe (ISO 27001) |
| Native Office 365 integration | Yes (Word, Excel, Teams…) | No (web interface + API) |
| Cloud Act exposure | Yes (US company) | No |
| Dedicated and isolated instance | No (shared infrastructure) | Yes (isolated instance) |
| Native GDPR compliance | Partial (DPA + EU residency) | Full (EU hosting) |
| Business knowledge base | Limited (M365 tenant) | Comprehensive (all formats, all sources) |
| Source citation | Partial | Yes (document + page) |
| Business customisation | Limited (M365 data) | Deep (RAG + fine-tuning) |
| AI phone agent | No | Yes |
| Website-embeddable chatbot | No | Yes |
| Multilingual (FR/EN/DE/LB) | Yes | Yes |
| Local Luxembourg support | No | Yes |
| Pricing | $30/user/month | On request (SME and Enterprise plans) |
Book a meeting
Let's discuss your needs and see how LetzAgents can help you.
Frequently asked questions
Everything you need to know to choose between Microsoft Copilot and LetzAgents.
Can you use LetzAgents AND Copilot at the same time?
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Absolutely. The two solutions address different needs and are complementary. Copilot for daily office tasks within Microsoft 365 (summarising emails, creating presentations), LetzAgents for complex business questions, client support via chatbot and AI phone reception. Many companies use both.
Doesn't Microsoft guarantee that my data stays in Europe?
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Microsoft offers data residency in Europe on Azure. However, Microsoft remains subject to the US Cloud Act, which can compel the company to disclose data. For regulated professions in Luxembourg, this legal nuance is significant. LetzAgents eliminates this grey area entirely.
Can Copilot access my documents outside Microsoft 365?
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No. Copilot only works with data accessible via Microsoft Graph (SharePoint, OneDrive, Outlook, Teams). If your business documentation is in other systems (ERP, accounting software, file server, database), Copilot cannot access it. LetzAgents ingests all formats regardless of their origin.
Can LetzAgents work inside Word or Excel like Copilot?
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No, LetzAgents does not integrate natively into Office applications. This is an architectural choice: LetzAgents is an independent tool accessible via the web and an API. If your primary need is an assistant inside Word and Excel, Copilot is better suited. If you need a business AI with a client chatbot and phone agent, LetzAgents is the right choice.
How do the costs of Copilot and LetzAgents compare?
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Copilot costs $30/month per user, on top of your M365 licence. For 20 users, that is $600/month without business customisation. LetzAgents offers tailored plans (SME and Enterprise) with pricing on request, including sovereign hosting, document ingestion and local support. Check our pricing for your situation.
Want to see how LetzAgents compares to Copilot on your own documents? Book a meeting for a free demo.
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