European File Storage: Nextcloud vs Tresorit for Business

File storage is where data sovereignty becomes tangible. Every document your team uploads, every contract shared with a client, every spreadsheet containing financial data — all of it lives on someone’s servers. For European organisations still relying on Google Drive or Dropbox, that means your files are ultimately governed by American law, accessible under the US CLOUD Act, and subject to a data transfer framework that has already been invalidated twice by the Court of Justice of the European Union.

The European file storage landscape offers two standout solutions that take fundamentally different approaches to solving this problem: Nextcloud and Tresorit. Understanding their differences is essential to choosing the right one for your organisation.

Nextcloud: Open Source, Self-Hosted, Fully Yours

Nextcloud is an open-source file sync and collaboration platform originally forked from ownCloud in 2016 by its original developer, Frank Karlitschek. Headquartered in Stuttgart, Germany, Nextcloud has grown into far more than a file storage tool. The current platform includes document editing (via Collabora or OnlyOffice integration), calendar, contacts, video conferencing (Talk), project boards, and a growing ecosystem of apps. It is, in many ways, the European answer to Google Workspace.

The defining feature of Nextcloud is that you control the infrastructure. You can deploy Nextcloud on your own servers, in a private data centre, or on a European cloud provider like Hetzner Cloud or Scaleway. This means your data never leaves your control. No third-party provider can access your files, no foreign government can compel disclosure, and your data protection officer can point to a specific rack in a specific building when regulators ask where data is stored.

This flexibility comes with a trade-off: operational responsibility. Someone on your team (or a managed hosting provider) needs to handle updates, backups, security patches, and scaling. For organisations with IT capacity, this is a strength. For small teams without dedicated infrastructure staff, it can be a burden.

Tresorit: Zero-Knowledge Encryption, Fully Managed

Tresorit takes the opposite approach. Founded in 2011 by Hungarian cryptographers and now headquartered in Switzerland, Tresorit is a fully managed, end-to-end encrypted file storage and sharing platform. Every file is encrypted on your device before it leaves your network, and Tresorit’s servers never have access to your encryption keys. This zero-knowledge architecture means that even if Tresorit’s servers were compromised or subpoenaed, the data would be unreadable.

Tresorit’s data centres are located in Switzerland, Ireland, and other European locations, all governed by European data protection law. The platform offers seamless desktop and mobile sync, secure link sharing with granular permissions, and integrations with Outlook and Gmail for encrypted attachment handling. For businesses in regulated industries — legal, healthcare, financial services — Tresorit’s combination of strong encryption and managed simplicity is compelling.

The trade-off here is flexibility. Tresorit is a focused file storage and sharing product, not a full collaboration suite. You will not find integrated video conferencing, project boards, or an app ecosystem. If you need those capabilities, you will need to pair Tresorit with other tools.

Head-to-Head Comparison

Control: Nextcloud gives you full control over infrastructure and data. Tresorit manages everything for you but within a zero-knowledge encryption model.

Encryption: Tresorit encrypts everything end-to-end by default. Nextcloud supports server-side encryption and can be configured with end-to-end encryption for specific folders, but it is not the default architecture.

Collaboration: Nextcloud offers a broader collaboration suite (documents, calendar, video, project boards). Tresorit focuses on file storage, sync, and secure sharing.

Cost model: Nextcloud’s software is free and open source; your cost is hosting and administration. Tresorit charges per-user subscription fees that include hosting, encryption, and support.

Compliance: Both are fully GDPR-compliant file storage solutions. Nextcloud’s compliance posture depends on where you host it. Tresorit handles compliance as part of the managed service.

Which One Is Right for Your Team?

Choose Nextcloud if your organisation values open-source software, has the IT capacity to self-host (or uses a managed Nextcloud provider), and wants a broad collaboration platform that replaces multiple US-based tools. Nextcloud is particularly strong for public sector organisations, universities, and companies that need to keep data within a specific jurisdiction down to the server level.

Choose Tresorit if your priority is strong encryption with zero operational overhead, you work in a regulated industry where zero-knowledge architecture simplifies compliance, or your team needs a polished file sync solution that works out of the box. Tresorit is ideal for law firms, financial advisors, and healthcare organisations that handle sensitive client data.

For a detailed look at how both compare to the US incumbents, explore our Google Drive alternatives and Dropbox alternatives pages. You can also browse all European file storage solutions or filter by GDPR-compliant providers to see the full landscape.

Whichever path you choose, moving your files to a European provider is one of the most impactful steps you can take toward genuine data sovereignty.