Filen

What it is

Spec sheet

What it does

Filen provides zero-knowledge, client-side encrypted cloud storage and communication services.Read 15 Oct 2026 · filen.io

Product

Filen is a zero-knowledge, client-side end-to-end encrypted cloud storage service.Read 1 Oct 2026 · filen.io

Audience

Filen says its service is built for individuals, professionals, businesses, developers, and people who prioritize security.Read 1 Oct 2026 · filen.io

Free plan

YesRead 20 Sep 2026 · filen.io

Integrations

The CLI and desktop client can run local WebDAV and S3-compatible mirror servers.Read 1 Oct 2026 · filen.io

Support

The home page advertises 24/7 customer support through its support panel and contact channels.Read 15 Oct 2026 · filen.io

Headquarters

Recklinghausen, GermanyRead 23 Sep 2026 · filen.io

Founded

2021Read 23 Sep 2026 · filen.io

API documentation depth

API documentation includes guides, endpoint references and an OpenAPI specification covering authentication, file operations, key management and transfers.Read 15 Oct 2026 · docs.filen.io

API encryption model

API file guides require client-side encryption, encrypted metadata and 1 MiB encrypted chunks for transfers.Read 15 Oct 2026 · docs.filen.io

Camera backup

Its mobile applications provide automatic camera upload for photos and videos.Read 15 Oct 2026 · trustradius.com

Collaboration

Filen offers encrypted notes with rich text, code, Markdown, and checklist options, plus end-to-end encrypted chats.Read 1 Oct 2026 · filen.io

Company founded and size

LinkedIn lists Filen Cloud Dienste as founded in 2021, headquartered in Recklinghausen, with 2–10 employees.Read 15 Oct 2026 · linkedin.com

Company headquarters

The legal disclosure lists Breite Straße 27, 45657 Recklinghausen, Germany.Read 15 Oct 2026 · filen.io

Company legal name

The operator is Filen Cloud Dienste UG (haftungsbeschränkt), registered at the District Court of Recklinghausen.Read 15 Oct 2026 · filen.io

Desktop downloads

Desktop builds are offered for Windows Intel/AMD and ARM, macOS Intel/AMD and Apple Silicon, and Linux in deb, rpm and AppImage formats for Intel/AMD and ARM.Read 15 Oct 2026 · docs.filen.io

Developer tools

Filen provides TypeScript, Rust, and Go SDKs, a documented API, and a command-line interface.Read 1 Oct 2026 · filen.io

Device platforms

Windows,macOS,Linux,iOS,AndroidRead 20 Sep 2026 · filen.io

Encryption

Files are encrypted on the client with AES-GCM 256-bit encryption before upload.Read 15 Oct 2026 · filen.io

File sharing

The service supports encrypted sharing through public or private links and sharing with other Filen users.Read 15 Oct 2026 · trustradius.com

File versioning

Filen supports reverting files to previous versions.Read 15 Oct 2026 · docs.filen.io

Funding and ownership

Filen says it was founded with €1,000 initial capital, has no external shareholders or investors, and is self-financed.Read 15 Oct 2026 · filen.io

German hosting

Filen says its headquarters and servers are in Germany and subject to German and European data-protection law.Read 15 Oct 2026 · filen.io

Hosting and compliance

Filen says its headquarters and servers are in Germany, its servers are in Tier III-IV ISO27001-certified colocation data centers, and it is GDPR compliant.Read 1 Oct 2026 · filen.io

Inactive free accounts

Filen says data from inactive free accounts is deleted after three months of inactivity, with reminder emails beforehand.Read 1 Oct 2026 · docs.filen.io

Limit: Android issues

Google Play reviewers report upload failures, navigation problems in large folders, missing copy functionality and incorrect thumbnails.Read 15 Oct 2026 · play.google.com

Limit: editing and integrations

Cloudwards reports no third-party integrations and says document editing is essentially unavailable except for basic text editing.Read 15 Oct 2026 · cloudwards.net

Limit: independent audit

Independent reviewers note that Filen has not published an external cryptographic security audit.Read 15 Oct 2026 · cloudstorageexplorer.com

Limit: iOS issues

App Store reviewers report crashes, failed camera uploads and PDF preview problems in some iOS versions.Read 15 Oct 2026 · apps.apple.com

Limit: large-folder downloads

Trustpilot reviewers report that downloading large folders can hang on both the website and desktop applications.Read 15 Oct 2026 · trustpilot.com

Limit: mobile reliability

The Capterra reviewer reports occasional bugs and mobile synchronization failures requiring a force stop.Read 15 Oct 2026 · capterra.com

Limit: speed

A hands-on review measured roughly 90–100 Mbps upload and 120–135 Mbps download on a 400 Mbps connection and called performance adequate rather than impressive.Read 15 Oct 2026 · cloudstorageexplorer.com

Mobile

The mobile apps support iOS and Android, encrypted camera uploads, offline files, notes, chats, and notifications.Read 1 Oct 2026 · filen.io

Mobile availability

Mobile applications are distributed for iOS/iPadOS and Android, with a direct APK option.Read 15 Oct 2026 · docs.filen.io

Notable news: free-account controls

On February 11, 2026, Filen announced that new signups through anonymization services might not receive the normal free storage, while existing accounts remain unaffected.Read 15 Oct 2026 · filen.io

Notes and chat

Paid plans include unlimited encrypted notes and encrypted chats.Read 15 Oct 2026 · filen.io

Open source

Filen says all of its apps are released under the AGPL v3 open-source license.Read 1 Oct 2026 · filen.io

Open-source licence

Filen says all of its applications are released under the GNU AGPL version 3 licence.Read 15 Oct 2026 · filen.io

Praise: privacy

Reviewers repeatedly praise the zero-knowledge encryption, German jurisdiction and open-source clients.Read 15 Oct 2026 · cloudstorageexplorer.com

Praise: support

The sole Capterra reviewer says support is highly responsive and resolves issues promptly.Read 15 Oct 2026 · capterra.com

Praise: value

Independent testing describes Filen as unusually inexpensive for zero-knowledge storage, with a generous 10 GB free tier and low monthly prices.Read 15 Oct 2026 · cloudstorageexplorer.com

Public API

Filen publishes an API used by its first-party clients for files, directories, sharing, notes, contacts, chats and account settings.Read 15 Oct 2026 · docs.filen.io

Rating on Apple App Store

3.8 out of 5 from 123 ratingsRead 15 Oct 2026 · apps.apple.com

Rating on Capterra

5.0 out of 5 from 1 reviewRead 15 Oct 2026 · capterra.com

Rating on Google Play

3.3 out of 5 from 1.48K reviewsRead 15 Oct 2026 · play.google.com

Rating on Trustpilot

3.8 out of 5 from 112 reviewsRead 15 Oct 2026 · trustpilot.com

SDKs

The documentation recommends a TypeScript SDK and also lists a work-in-progress Go SDK.Read 15 Oct 2026 · docs.filen.io

Security reporting

Filen ended its public bug-bounty programme and now considers only serious, reproducible high- or critical-severity reports, with discretionary rewards.Read 15 Oct 2026 · filen.io

Storage limit

200Read 20 Sep 2026 · filen.io

Sync and drive

Filen provides network-drive access with Smart Sync and five sync modes.Read 1 Oct 2026 · filen.io

Synchronization

Filen offers real-time synchronization across browser, desktop, mobile and tablet clients, including selective synchronization.Read 15 Oct 2026 · trustradius.com

System requirements

The download documentation specifies 64-bit Intel/AMD and ARM desktop packages rather than a minimum operating-system version.Read 15 Oct 2026 · docs.filen.io

Zero-knowledge encryption

YesRead 20 Sep 2026 · filen.io

Plans and prices

Every Filen plan and price →

Strong points and limits

Who it suits

Verdict

Where Specifiction places it

• Cloud Storage Services#4 of 649.3
• Secure Cloud Storage#3 of 309.3
• Cloud storage#13 of 669.1