Cloud storage has become a normal part of everyday computing. Services such as Google Drive, OneDrive, Dropbox, and iCloud make it easy to store files and access them from different devices.
But convenience isn’t the only thing that matters. For some users, privacy and control over their data are just as important.
This is where Filen takes a different approach.
Filen is a cloud storage service built around client-side, end-to-end encryption. Your files are encrypted on your device before they are uploaded to the cloud.
For privacy-conscious users, Linux users, developers, and homelab enthusiasts, Filen offers an interesting combination of encrypted storage and technical features.
What is Filen?
Filen is an encrypted cloud storage platform for storing, synchronizing, sharing, and accessing files across devices.
From a user’s perspective, it works much like other cloud storage services. You can create folders, upload files, synchronize directories, and access your data through its applications or web interface.
The major difference is the encryption model.
Filen is designed around client-side encryption, meaning your files are encrypted before they leave your device.
Your computer -> Encrypt locally -> Encrypted File -> Upload -> Filen Cloud
Filen says its encryption uses AES-256-GCM and follows a zero-knowledge approach.
What does zero-knowledge mean?
In simple terms, Filen’s zero-knowledge design means the service provider does not have access to the keys needed to simply decrypt your stored files.
Encryption and decryption happen on the client side.
This provides an additional layer of privacy because Filen’s servers store encrypted data rather than ordinary readable copies of your files.
However, zero-knowledge does not mean that security is automatic. Your password, account security, recovery options, and the client software you use are still important.
Filen’s published security documentation explains that the user’s password is fundamental to its encryption system, so losing access to the required credentials can have serious consequences for data recovery.
Open-source applications
Another interesting aspect of Filen is its open-source approach.
Filen states that its applications are released under the AGPL v3 license, allowing the code to be inspected by developers and security researchers.
The service provides applications for:
- Windows
- macOS
- Linux
- Android
- iOS
Linux users can download .deb, .rpm, and AppImage packages, including ARM versions.
Privacy and infrastructure
Filen is based in Germany and states that its headquarters and servers are located there.
The company also states that its infrastructure operates from Tier III–IV and ISO 27001-certified data centers in Germany.
For people who care about where their cloud data is stored, this is another reason to consider Filen.
Filen also states that its service is GDPR compliant and built around privacy and security.
Free storage
Filen offers a free Starter option.
The free plan provides 10 GiB of storage, along with features such as:
- Unlimited bandwidth
- Unlimited uploadsClient-side encryptio
- Zero-knowledge technology
- File synchronization
- Network drive support
- Filen-to-Filen sharing
- Limited notes and chats
- CLI access
The free plan can be a good way to try the service before deciding whether you need more storage.
🎁 Get an Additional 10 GB with My Referral
If you want to try Filen, you can use my referral link when creating your account.
You can receive an additional 10 GB through a valid referral signup, and I can also receive 10 GB of referral storage.
👉 Use my Filen referral link and get an additional 10 GB
Filen’s current referral system allows a user to receive 10 GB for each successful referral, up to three referrals (30 GB). The person joining through a valid referral can also receive an additional 10 GB, subject to Filen’s eligibility requirements.
So there is an opportunity to increase the free storage considerably through referrals.
Filen on Linux
One of the features I find particularly interesting about Filen is its Linux support.
Along with a graphical desktop client, Filen provides a full command-line interface (CLI).
This is useful for Linux servers, headless machines, developers, and homelab users who don’t want to depend on a graphical interface.
Installation on Linux can be done using Filen’s installer:
curl -sL https://filen.io/cli.sh | bash
The CLI can then be used to manage files directly from the terminal.
For example:
filen ls /Docs
Synchronize a local directory:
filen sync /home/user/Documents:tw:/Docs
Or mount your Filen storage:
filen mount /home/user/Filen
Docker support
Filen also provides an official CLI Docker image:
docker pull filen/cli
This is particularly useful if you’re already running Docker on a home server or homelab.
Instead of installing additional software directly on the host, you can run the Filen CLI inside a container.
Filen and rclone
Another feature that makes Filen interesting for technical users is official rclone support.
rclone is a command-line tool used to manage files across cloud storage providers. It is widely used for synchronization, mounting, and automated backups.
Filen’s backend was officially merged into rclone, starting with rclone v1.73 in early 2026.
This means you can use standard rclone commands with Filen.
For example:
rclone ls filen:
Copy a local directory:
rclone copy /local/folder filen:/remote/folder
You can also mount Filen storage:
rclone mount filen: /mnt/filen
For homelab users, this is particularly useful because rclone can be incorporated into scripts and cron jobs.
WebDAV and S3
Filen’s CLI also supports exposing your encrypted storage through WebDAV and S3 interfaces.
This can be useful when another application doesn’t directly support Filen but understands one of these standard protocols.
Filen describes these as locally hosted interfaces provided through its client tools, allowing users to integrate encrypted Filen storage with other applications.
Filen vs traditional cloud storage
Filen and services such as Google Drive or OneDrive are aimed at somewhat different priorities.
Traditional cloud platforms usually focus heavily on productivity, collaboration, and integration with other services.
Filen focuses more strongly on privacy and encrypted storage.
- Feature Filen Traditional Cloud Storage
- Client-side encryption Yes Usually not standard
- Zero-knowledge design Yes Varies
- Linux CLI Yes Varies
- rclone Yes Often available
- File synchronization Yes Yes
- Privacy focus High Varies
- Productivity ecosystem Smaller Usually larger
So it isn’t necessarily about which service is “better.”
If you need online office applications and collaboration, Google Drive or Microsoft OneDrive may make more sense.
If your priority is private, encrypted cloud storage, Filen is worth considering.
Things to consider
Filen isn’t necessarily the right choice for everyone.
Its privacy-focused architecture also means it doesn’t provide the same productivity ecosystem as Google Workspace or Microsoft 365.
Another important consideration is account security. With client-side encryption, your credentials are closely tied to your ability to access your encrypted data.
You should also remember that encrypted cloud storage and backup are two different things. Filen can be part of a backup strategy, but you should still maintain appropriate copies and retention.
Final thoughts
Filen is more than just another cloud drive.
Its main focus is privacy. Files are encrypted on the client before being uploaded, and its zero-knowledge design is intended to prevent the provider from having direct access to the contents of your stored files.
What makes Filen particularly interesting for technical users is everything around that encryption: Linux support, a full CLI, Docker, rclone integration, network mounting, WebDAV, and S3 support.
For someone who simply wants encrypted cloud storage, Filen is worth trying.
For Linux and homelab users, it can be even more useful because it can be integrated into existing command-line and backup workflows.
If privacy is more important to you than having the biggest productivity ecosystem, Filen is definitely a cloud storage service worth exploring.
