Sync-in

Name: Sync-in
Brand: Sync-in

Self-hosted, open-source platform for file sync and document collaboration

softwareFile Sync self hosted file sync open source

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Our Verdict

Best for

Technical teams that want a self-hosted Dropbox/Nextcloud alternative with real-time document editing

Skip if

You want a managed cloud service with nothing to host or maintain

What is Sync-in?

Sync-in is a self-hosted, open-source file storage and synchronization platform built with TypeScript, positioned as a data-sovereign alternative to Dropbox, Google Drive, and Nextcloud. It pairs desktop sync clients for Windows, macOS, and Linux with real-time collaborative document editing through Collabora Online and OnlyOffice.

SpecificationsAI-estimated

deploymentSelf-hosted

open source✅ Yes

api available✅ Yes

support optionsGitHub issues, Discord community

key integrationsCollabora Online, OnlyOffice, WebDAV

Key Features of Sync-in

Provides desktop sync clients for Windows, macOS, and Linux that automatically keep local folders in sync with the server.

Supports real-time collaborative document editing through Collabora Online and OnlyOffice integrations.

Organizes files into team-based Spaces with granular, per-user or per-group permission controls.

Supports nested shares so subsets of a space can be shared with different access levels.

Indexes documents for full-text search across formats including Office files, PDF, HTML, and plain text.

Exposes unified access across the web interface, WebDAV, sync clients, and API.

Tracks activity through comments, notifications, and change logs.

Is released under the AGPL-3.0 license and distributed via Docker, npm, and source builds.

Use Cases for Sync-in

Running an internal file server

Host a private, self-controlled alternative to Dropbox or Google Drive for a team or organization.

Collaborative document editing

Edit Office and OpenDocument files together in real time via the Collabora or OnlyOffice integration.

Controlled external sharing

Share a specific nested folder with an outside collaborator without exposing the whole space.

Searching large document archives

Use full-text indexing to find content across PDFs, Office files, and plain text stored on the platform.

Pros & Cons of Sync-in

Pros

Fully self-hosted with complete data ownership
Open source under AGPL-3.0
Real-time collaborative editing built in
Native desktop sync clients for all major OSes

Cons

Requires self-hosting infrastructure and maintenance
Newer project with a smaller community than Nextcloud
No official pricing page for paid enterprise support

Frequently Asked Questions

Is Sync-in free?

Yes, it is free and open source under the AGPL-3.0 license; it must be self-hosted.

Does it support desktop sync?

Yes, native sync clients are available for Windows, macOS, and Linux.

Can multiple people edit a document at once?

Yes, through Collabora Online or OnlyOffice integration for real-time collaborative editing.

How is it deployed?

It can be deployed via Docker, npm packages, or built from source, and is self-hosted on your own infrastructure.

Pricing Overview

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Free

Detailed plans are not listed. Visit the official website for pricing information.

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