Sync-in review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Sync-in is an open-source platform for storing, sharing, synchronizing, and collaborating on files on infrastructure chosen by its operator. Individuals, businesses, public-sector entities, and institutions can organize files in personal and collaborative spaces, with access through a web interface or desktop synchronization clients for Windows, macOS, and Linux. It fits teams that want control over their file environment alongside shared workspaces, rather than a storage service operated entirely by a provider.

Its collaboration features combine sharing with users, groups, and guests, including share links, with fine-grained permissions and file locking. Comments, activity tracking, favorites, and full-text search support day-to-day work with files; search can use optional indexing. Collaborative editing is provided through integrations with Collabora Online, OnlyOffice, Euro-Office, or draw.io, rather than being described as a standalone editing suite. LDAP and OpenID Connect are available for identity integration, and SMTP is also supported. This mix makes Sync-in a fit for organizations connecting file storage to existing identity or office-editing tools, provided they are prepared to operate the surrounding services.

The project describes Sync-in as free and open source. The server upload limit is configurable by the operator, with a documented default of 5 GB, so the limit depends on how the server is configured rather than a fixed plan allowance. That flexibility comes with operational responsibility: the organization chooses and manages the infrastructure. Sync-in is a stronger fit for teams that want self-hosting, desktop sync, and collaborative spaces; teams seeking a provider-managed service or an all-in-one editing environment should consider alternatives better aligned with that model.

Sync-in pros and cons

• Where it wins
  • Personal and collaborative spaces with fine-grained permissions and file locking
  • Desktop synchronization clients for Windows, macOS, and Linux
  • Office editing, identity, and diagram integrations, including Collabora Online and LDAP
• Where it doesn't
  • Operating the platform requires infrastructure chosen and managed by the operator
  • Collaborative editing depends on integrations such as Collabora Online or OnlyOffice
  • The server operator must configure the upload limit; it is not a fixed plan allowance

Sync-in fact sheet, pricing and score →

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Last updated 29 Oct 2026 · How we research and update