OnlyOffice

ONLYOFFICE is a Microsoft 365 / Google Docs alternative office suite — documents, spreadsheets, presentations, PDF editing, fillable forms, real-time co-authoring — operated by **Ascensio System SIA**, headquartered in Riga, Latvia and founded in 2009 by **Lev Bannov**. The product ships as a fully open-source AGPLv3 codebase plus a managed DocSpace cloud, with desktop apps (Windows, Linux, macOS), mobile apps (iOS, Android), and 40+ third-party connectors for embedding into platforms like Nextcloud, ownCloud, Confluence, and many others. Real-world EU adoption is significant — the city of **Lyon, France** publicly migrated to OnlyOffice in 2025 as part of its sovereign-IT strategy. For an EU-sovereignty audit ONLYOFFICE is the most structurally complex listing in the docs-and-wikis category. The operating-and-contracting entity is **Ascensio System SIA** in Riga, Latvia — an EU member state company. But the corporate ownership chain has multiple non-EU layers that procurement teams must understand before signing material multi-year deals: Ascensio System SIA was originally established in 2009 as a subsidiary of the **Russian-based New Communication Technologies**; in **August 2023 the ownership restructure** transferred control to **Ascensio System Limited (UK)**, which is in turn owned by **OnlyOffice Capital Group Pte. Ltd. (Singapore)**; the founder and **ultimate beneficial owner Lev Bannov** holds Russian and Turkish dual citizenship and has resided in **Istanbul, Turkey** since 2023. The August 2023 restructure was specifically designed to distance the operating entity from Russian ownership and align with EU procurement norms — but the structure is still non-trivial: EU-operating, UK-holding, Singapore-master-holding, Russian-Turkish UBO. AGPLv3 open-source means the entire codebase is auditable and self-hostable — this is the procurement-grade escape hatch. **Running the open-source ONLYOFFICE Community / Document Server on EU infrastructure (Hetzner, OVHcloud, Scaleway, IONOS, STACKIT)** keeps everything inside the customer's chosen jurisdiction and effectively neutralises the ownership-chain complexity for the deployment data flows. Pricing: open-source self-host free; DocSpace Cloud free Startup tier with paid Business / Enterprise tiers. Best fit: EU public-sector and government buyers (Lyon model) that self-host on EU infrastructure under AGPLv3, organisations needing Microsoft Office format compatibility with sovereign-deployment options, and any procurement-grade buyer comfortable with the complex but EU-operating ownership chain (or who self-hosts to neutralise it).