Best Open Source Alternatives to Sync.com

Compare the best free and open-source alternatives to Sync.com — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 6 alternatives

Sync.com

Proprietary SaaS

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Platformsweb, desktop, mobile, windows, macos, android, ios

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Sync.com alternatives compared

Open-source alternatives to Sync.com, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Syncthing	90,040	MPL-2.0	LinuxmacOSWindowsandroid	Yes	Nov 2026	Visit
Nextcloud	37,396	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Nov 2026	Visit
Seafile	15,414	GPL-2.0	LinuxmacOSWindowsDocker	Yes	Oct 2026	Visit
ownCloud	8,837	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Nov 2026	Visit
Pydio Cells	2,257	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Nov 2026	Visit
Cozy Cloud	1,268	AGPL-3.0	LinuxmacOSDockerWeb	Yes	Nov 2026	Visit

Top open-source Sync.com alternatives

Syncthing90,040MPL-2.0

Syncthing replaces commercial cloud sync tools like Dropbox with private, decentralized peer-to-peer file synchronization across your own devices.

LinuxmacOSWindowsandroidDocker

vs Sync.com: a free, open-source option you fully control, licensed MPL-2.0.

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Nextcloud37,396AGPL-3.0

Nextcloud is an open-source Dropbox and Google Drive alternative that pairs private cloud file sync with integrated office editing and calendar apps.

LinuxmacOSWindowsDockerWeb

vs Sync.com: a free, open-source option you fully control, licensed AGPL-3.0.

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Seafile15,414GPL-2.0

Seafile is an open-source file sync and cloud storage system that replaces Dropbox with client-side encryption, virtual drives, and self-hosted control.

LinuxmacOSWindowsDockerWeb

vs Sync.com: a free, open-source option you fully control, licensed GPL-2.0.

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ownCloud8,837AGPL-3.0

ownCloud is an open-source file sync and storage platform that replaces Google Drive and Dropbox, giving users private custody over multi-device files.

LinuxmacOSWindowsDockerWeb

vs Sync.com: a free, open-source option you fully control, licensed AGPL-3.0.

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Pydio Cells2,257AGPL-3.0

Pydio Cells replaces Box and Dropbox with a self-hosted file platform, giving teams full data privacy, shared workspaces, and direct storage control.

LinuxmacOSWindowsDockerWeb

vs Sync.com: a free, open-source option you fully control, licensed AGPL-3.0.

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Best Open Source Alternatives to Sync.com

Sync.com

Sync.com alternatives compared

Top open-source Sync.com alternatives

The modern standard for Protobuf workflows

Mentoring for backend developers. Consulting for startups.

More alternatives to Sync.com

Cozy Cloud