europioneer

Out of Microsoft — completely and for good

Nextcloud instead of OneDrive, Linux instead of Windows, Mailbox.org instead of Exchange — a battle-tested stack that fully replaces Microsoft 365.
Talk to us about migrationRead the migration guide

This stack fully replaces Microsoft 365, Azure AD, Windows and any other proprietary product with open-source alternatives — hosted in Germany, controlled by you.

Collaboration & Cloud

Nextcloud runs on a dedicated Hetzner server (from ~€16/month for 20 users) and is governed by German law alone.

  • OneDrive / SharePointNextcloud Files

    File sync, sharing, versioning

  • Office OnlineONLYOFFICE Docs

    Browser-based editing — full MS compatibility, integrated into Nextcloud

  • Microsoft Teams (Meetings)Nextcloud Talk

    Video, chat and screen-sharing — straight in the browser

  • Microsoft FormsNextcloud Forms

    Surveys and forms

Communication & Messaging

Matrix/Element is used by the European Commission (32,000 staff), the German Bundeswehr and 40+ German universities.

  • Microsoft Teams (Chat)Element / Matrix

    Federated, E2E-encrypted, no vendor lock-in

  • OutlookThunderbird

    Full-featured desktop mail client with OpenPGP integration

  • Exchange OnlineMailbox.org

    Privacy-friendly email service hosted in Germany, GDPR-compliant

Desktop & OS

Windows-to-Linux migration runs smoothly for standard workplaces. We assess industry-specific software compatibility upfront.

  • Windows 10/11Ubuntu LTS

    Stable day-to-day operation, long support cycles

  • Windows DesktopKDE Plasma

    Familiar shell for Windows switchers

  • Microsoft OfficeONLYOFFICE Desktop

    Writer, Calc, Impress — full DOCX/XLSX compatibility

Mobile & Smartphones

For most SME staff, GrapheneOS plus the Nextcloud calendar is fully sufficient.

  • Android (Google)GrapheneOS

    Hardened, de-googled Android — ideal for Pixel devices in business use

  • Exchange ActiveSyncNextcloud Mobile

    Calendar, contacts and files via DAVx⁵

IT Infrastructure

Proxmox is the most-used open-source virtualization platform in Europe and the foundation of our infrastructure migrations.

  • Hyper-V / Azure VMProxmox VE

    Virtualization platform for your own servers

  • Azure Active DirectoryKeycloak

    Identity & access management, SSO, LDAP

  • VPN (Azure)WireGuard

    Modern, lightweight VPN protocol

  • Windows Defender FirewallOPNsense

    Open-source firewall and router

Business, ERP & Online Shop

ERPNext is 100% open source. Shop, inventory and accounting run in one system — no sync, no integration upkeep, no vendor holds the keys.

  • Dynamics 365 / JTL / ShopifyERPNext (Frappe)

    Inventory, accounting, purchasing and production in one system

  • Proprietary WebshopNuxt + ERPNext API

    Headless storefront — catalog, cart and checkout share the warehouse database

  • SharePoint (Documents)Paperless-ngx

    Document management with OCR and tagging

Security & Backup

Vaultwarden runs on any small server and fully replaces expensive password-manager subscriptions.

  • 1Password / LastPassVaultwarden

    Self-hosted password manager (Bitwarden-compatible)

  • Azure BackupRestic + BorgBackup

    Encrypted, deduplicated backups

  • Microsoft DefenderCrowdSec

    Collective threat intelligence and IP reputation

Migration Roadmap

From the first call to the Microsoft licence cancellation — in five realistic phases.

  1. 1

    Analysis

    1–4 weeks

    Inventory, risk assessment, scheduling

  2. 2

    Infrastructure

    1–3 weeks

    Proxmox, Keycloak, Mailbox.org setup

  3. 3

    Collaboration

    2–4 weeks

    Nextcloud, Matrix/Element, ONLYOFFICE

  4. 4

    Workplaces

    2–6 weeks

    Linux, ONLYOFFICE, training

  5. 5

    Wrap-up

    1–2 weeks

    Stabilisation, Microsoft licence cancellation

Our [migration guide](/docs/getting-started/migration-fahrplan) describes the full process in depth.

Costs in comparison

A typical SME with 20 staff pays around €280/month for Microsoft 365 Business Premium (as of 2025). The comparable open-source stack is an order of magnitude cheaper.

Baseline Microsoft

Microsoft 365 Business Premium · 20 users

~€280/month

License cost without premium add-ons

europioneer Stack Open Source
  • Hetzner servers (2× CX21)~€12/month
  • Hetzner storage~€9/month
  • Backup~€2/month
Total ~€23/month
One-off migration cost typically pays back within 6–12 months.
Online Shop & ERP

Online Shop & ERP

Headless storefront on ERPNext + Nuxt — three paths depending on your appetite and setup.

  • Own hardware

    Fresh ERPNext + Nuxt install on your own infrastructure. Setup, training, handover — you run it from there.

  • Recommended

    Managed

    We host in Falkenstein, handle updates, backups and monitoring. Cancel monthly.

  • Migration

    Full migration from WordPress + WooCommerce, Shopify or Magento. Data import, custom fields, cutover without downtime.

More about the shopCompare pricing

Ready to switch?

We guide you step by step — from analysis through to staff training.
Free first callMigration guide