Syncthing
Open Sourceby Syncthing Foundation
Continuous file sync between your devices, with no cloud in between.
- Direct peer-to-peer encrypted sync
- No third-party server stores your data
- File versioning
3 Best Free Alternatives to Dropbox
Dropbox is paid software from Dropbox, Inc.. These backup & recovery programs do the same job for free.
- 3 free alternatives
- 3 open source
- ₹0 to download
- All free backup & recovery
Free alternatives to Dropbox
Duplicati
Open Sourceby Duplicati Team
Encrypted, incremental backup to any cloud storage.
- AES-256 encryption before upload
- Works with most cloud storage providers
- Incremental deduplicated backups
FreeFileSync
Open Sourceby Zenju
Folder comparison and synchronisation done properly.
- Visual folder comparison before syncing
- Real-time and scheduled sync jobs
- Handles very large file sets
Can free software really replace Dropbox?
Syncthing keeps folders in sync directly between your own devices with no third-party server holding your files, removing both the storage limit and the privacy question.
Being honest about it: free alternatives are not always a feature-for-feature match, and anyone telling you otherwise is selling something. What they are is free — so the cost of finding out whether they cover your particular workflow is an hour of your time rather than a subscription.
The closest replacement: Syncthing
Syncthing keeps folders synchronised directly between your own devices over encrypted peer-to-peer connections, with no third-party server ever holding your files. A genuine private alternative to Dropbox-style sync.
- Direct peer-to-peer encrypted sync
- No third-party server stores your data
- File versioning
- Runs on desktops, servers and Android
All 3 free Dropbox alternatives compared
| Program | Licence | Platforms | Best known for |
|---|---|---|---|
| Syncthing | Open Source | Windows, macOS, Linux, Android | Direct peer-to-peer encrypted sync |
| Duplicati | Open Source | Windows, macOS, Linux | AES-256 encryption before upload |
| FreeFileSync | Open Source | Windows, macOS, Linux | Visual folder comparison before syncing |
The other options in detail
Duplicati Open Source
Duplicati backs up to almost any cloud destination — S3, Backblaze B2, Google Drive, OneDrive, FTP and more — with strong client-side encryption applied before anything leaves your machine, plus incremental, deduplicated storage. Notable for aes-256 encryption before upload and works with most cloud storage providers. Runs on Windows, macOS, Linux.
FreeFileSync Open Source
FreeFileSync compares and synchronises folders, drives and network shares, showing exactly what will change before it acts. Notable for visual folder comparison before syncing and real-time and scheduled sync jobs. Runs on Windows, macOS, Linux.
How to choose
3 are fully open source (Syncthing, Duplicati, FreeFileSync) — pick one of these if you value auditable code you can self-host. For the widest platform coverage, Syncthing, Duplicati, FreeFileSync run on three or more operating systems.
All 3 are free to download from the publisher's own website, so installing two or three and testing them on your own files is the fastest way to decide — it costs nothing but a few minutes.
Why open source matters here
3 of these (Syncthing, Duplicati, FreeFileSync) are open source. That means no company can later restrict the free tier, raise a price, or discontinue the product and leave your files stranded — the situation that pushes many people to look for an alternative to Dropbox in the first place.
Frequently asked questions
What is the best free alternative to Dropbox?
Syncthing is the closest match — continuous file sync between your devices, with no cloud in between. If it does not suit your workflow, Duplicati, FreeFileSync are worth trying.
Is there a free version of Dropbox itself?
Dropbox is commercial software from Dropbox, Inc.. The programs above are separate products that do the same job — not cracked or modified copies. We do not link to pirated software under any circumstances.
Are these safe to download?
Yes, provided you get them from the publisher. Every button above opens the software author's own official website — we host no installers.