Sync-in is an open-source, self-hosted alternative to Dropbox and Nextcloud. Explore features, pricing, pros, cons, and FAQs.
Category
File Management
Pricing
open-source/free (self-hosted) with optional enterprise support, from Free
Verified
Not yet
Last updated
July 19, 2026
Founded
2025
WindowsWeb AppAPIOpen SourceSelf-HostedMac
What Is Sync-in
Sync-in is an open-source platform for storing, syncing, and sharing files while keeping full control over the underlying data. It is designed as a sovereign, self-hosted alternative to commercial cloud storage and collaboration tools such as Dropbox, Google Drive, and Nextcloud.
The server component is written in TypeScript with a deliberately minimal dependency footprint to reduce attack surface and simplify deployment. It is released under the AGPL-3.0 license, and public reporting indicates the project publicly emerged around mid-2025, building on years of prior underlying development.
Key Features
Sync-in combines secure file sharing with granular permissions, access limits, expiration dates, and password protection, alongside desktop synchronization clients for Windows, macOS, and Linux. Real-time collaborative document editing is available through Collabora Online, OnlyOffice, or Euro-Office integrations.
The platform also provides full-text search across common document formats including Microsoft Office files, PDFs, HTML, and plain text; WebDAV support for mounting storage as a network drive; and collaborative spaces with fine-grained access controls for teams, along with authentication options spanning local accounts, OIDC, LDAP, and multi-factor authentication.
Pricing
Sync-in is free and open-source, and the project describes itself as independent. There is no disclosed public pricing page for a paid hosted tier; organizations self-host the platform on their own infrastructure. Separate enterprise support services are mentioned by the project for organizations that want vendor assistance.
Key Features
Secure file sharing links — Share files and folders with granular permissions, access limits, expiration dates, and password protection.
Desktop sync clients — Native synchronization applications for Windows, macOS, and Linux keep local folders in sync with the server.
Real-time collaborative editing — Edit documents together in real time through Collabora Online, OnlyOffice, or Euro-Office integrations.
Full-text search — Indexes and searches content inside Microsoft Office files, PDFs, HTML, and plain text documents.
WebDAV support — Mount Sync-in storage as a network drive or connect it to third-party WebDAV-compatible applications.
Collaborative spaces — Team-based folder structures with fine-grained access controls for organized group collaboration.
Flexible authentication — Supports local accounts, OIDC, LDAP, and multi-factor authentication for enterprise identity integration.
Activity tracking — Provides real-time change notifications, comments, and activity logs across shared content.
Pros & Cons
Pros
Fully open-source and self-hosted for complete data sovereignty
Built-in real-time document collaboration via Collabora or OnlyOffice
Minimal dependency TypeScript codebase reduces security surface area
Flexible enterprise authentication (OIDC, LDAP, MFA) out of the box
Free to deploy with no per-user licensing fees
Cons
Requires self-hosting expertise and infrastructure management
Newer public project with a smaller community than Nextcloud or ownCloud
No verified information on the company, founders, or funding behind the project
No official managed cloud offering for teams that prefer not to self-host
Collaborative editing depends on integrating separate services like Collabora or OnlyOffice