CryFS vs Duplicacy
Side-by-side comparison of features, pricing, ratings, and alternatives.
CryFS is a free, open-source cryptographic filesystem that encrypts files locally before they are synced to cloud storage providers like Dropbox, Google Drive, iCloud, or OneDrive. Unlike tools that only encrypt file contents, CryFS also hides file sizes, file names, and the directory structure itself, so a compromised cloud provider cannot infer what is stored.
Duplicacy is a cross-platform backup tool from Acrosync LLC that backs up files to a wide range of cloud storage providers, local disks, and SFTP servers. Its core technical differentiator is lock-free deduplication, a chunk-based approach that avoids the centralized locking databases used by many other deduplication backup tools.
- Completely free and open source
- Hides metadata (names, sizes, structure), not just content
- Works with any cloud storage provider's sync client
- Actively maintained on GitHub
- Free command-line tool for individual, non-commercial backups
- Lock-free design avoids common deduplication database corruption issues
- Supports a very wide range of storage backends
- Source-available CLI adds transparency
- Requires comfort with command-line tools and FUSE/Dokany setup
- Windows and newer macOS support has historically lagged behind Linux
- No official GUI, so it's less approachable for non-technical users
- GUI and commercial use require a paid per-machine license
- Steeper learning curve than simple consumer backup apps
- Interface is more utilitarian than modern consumer backup products
More alternatives & similar tools
Alternatives to CryFS
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Open-source client-side encryption that locks individual files before they sync to any cloud drive.
Cross-platform encrypted containers from Jetico for protecting files on disk and in cloud storage.
Alternatives to Duplicacy
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Cross-platform cloud backup for personal files, servers, and MSP client environments.
The Verdict
AI-generated from listing dataCryFS is a free, open‑source tool that encrypts file contents and metadata for any cloud sync, but requires command‑line expertise; Duplicacy adds backup, deduplication and a web GUI at a cost for commercial use, offering broader storage support.
Key differences
- •CryFS encrypts file names, sizes, and directory structure, while Duplicacy focuses on backup and deduplication without hiding metadata.
- •CryFS is completely free and open source; Duplicacy is freemium with paid licenses for GUI and commercial use.
- •Duplicacy provides a web‑based GUI and extensive storage‑backend list; CryFS has no official GUI and limited listed integrations.
- •CryFS works by mounting a virtual filesystem via FUSE; Duplicacy runs as a backup service with lock‑free deduplication.
- •Support options are only listed for Duplicacy (forum, email); CryFS offers no formal support channels.
Pricing & value
CryFS is fully free and open source; Duplicancy requires paid licenses for GUI/commercial use.
Ease of use / learning curve
Duplicacy offers a web GUI and documented CLI; CryFS lacks a GUI and needs FUSE/Dokany setup.
Features & depth
Duplicacy adds backup scheduling, lock‑free deduplication, and multi‑backend support; CryFS only encrypts a mounted filesystem.
Integrations & ecosystem
Duplicacy lists many backends (S3, Backblaze B2, SFTP, etc.); CryFS lists only major consumer sync services.
Support
Duplicacy provides community forum and email support; CryFS has no specified support options.
Security & privacy
CryFS encrypts filenames, sizes, and structure with AES‑256‑GCM or XChaCha20‑Poly1305; Duplicacy’s encryption details are not specified.
Scalability
Duplicacy’s lock‑free deduplication handles large backup sets efficiently; CryFS is limited to filesystem encryption.
Choose CryFS if…
Privacy‑focused users comfortable with CLI who need transparent encryption for any cloud sync.
Choose Duplicacy if…
Technical users or small businesses needing backup, deduplication, and multi‑cloud support, willing to pay for GUI/commercial use.
Common questions
Is there any cost to use CryFS or Duplicacy?
CryFS is completely free; Duplicacy is free for command‑line personal use but requires a paid per‑machine license for its GUI and commercial use.
Can CryFS hide file names and folder structure?
Yes, CryFS encrypts file contents, names, sizes, and directory structure, storing data in randomized blocks.
Which tool supports automated backups to many cloud providers?
Duplicacy supports automated backups with lock‑free deduplication to many backends (Amazon S3, Google Drive, Backblaze B2, SFTP, etc.). CryFS only encrypts files for any sync client.