OSI-licensed open source
File management software covers storing, syncing, sharing and organising files and documents. Open-source options let organisations keep data on their own servers, avoid per-user cloud fees and integrate with existing authentication.
This page lists OSI-licensed tools verified on their repositories: file sync and share platforms (Nextcloud, ownCloud, Seafile, Pydio Cells), peer-to-peer sync (Syncthing), document archiving (Paperless-ngx) and a multi-backend web file manager (Filestash). File Browser is omitted because its repository is archived.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| Nextcloud | Full self-hosted collaboration and file platform | Free, open source (self-hosted); enterprise subscriptions, See vendor pricing | AGPL-3.0 |
| ownCloud | Established enterprise file sync and share | Free, open source (Core); commercial editions, See vendor pricing | AGPL-3.0 |
| Seafile | Fast library-based sync | Free, open source (Community); Pro edition, See vendor pricing | GPL-2.0-only |
| Syncthing | Private peer-to-peer sync without a server | Free, open source | MPL-2.0 |
| Pydio Cells | Organisation file sharing with workflow | Free, open source (Community); paid editions, See vendor pricing | AGPL-3.0 |
| Paperless-ngx | Scanning and archiving paper documents | Free, open source | GPL-3.0 |
| Filestash | One web interface across many storage backends | Free, open source (self-hosted); paid options, See vendor pricing | AGPL-3.0 |
Best for: Full self-hosted collaboration and file platform · Free, open source (self-hosted); enterprise subscriptions, See vendor pricing
Nextcloud Server is a self-hosted platform for storing, syncing and sharing files, contacts and calendars, extended with apps and including encryption and two-factor authentication.
Best for: Established enterprise file sync and share · Free, open source (Core); commercial editions, See vendor pricing
ownCloud Core is the server-side component of ownCloud Classic, handling file storage, sync and sharing with WebDAV, CalDAV and CardDAV servers, an app plugin system and a REST API.
Best for: Fast library-based sync · Free, open source (Community); Pro edition, See vendor pricing
Seafile is an open-source cloud storage system with privacy protection and team collaboration. It groups files into separately syncable libraries and adds metadata management.
Best for: Private peer-to-peer sync without a server · Free, open source
Syncthing is a continuous file synchronisation program that keeps files in sync across computers. Its priorities are safety from data loss, security and ease of use.
Best for: Organisation file sharing with workflow · Free, open source (Community); paid editions, See vendor pricing
Pydio Cells is a file-sharing and content collaboration platform for organisations, a Go rewrite of the Pydio project built on a microservices architecture.
Best for: Scanning and archiving paper documents · Free, open source
Paperless-ngx is a community-supported document management system that turns physical documents into a searchable online archive. It is the official successor to Paperless and Paperless-ng.
Best for: One web interface across many storage backends · Free, open source (self-hosted); paid options, See vendor pricing
Filestash is a file manager that connects to many storage backends including FTP, SFTP, S3, SMB and WebDAV through a web client, with plugin-driven storage and authentication.
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| If you need… | Start with |
|---|---|
| All-in-one self-hosted cloud | Nextcloud, ownCloud |
| Fast sync with team libraries | Seafile |
| Private device-to-device sync | Syncthing |
| Organisation file sharing | Pydio Cells |
| Searchable document archive | Paperless-ngx |
| Web UI over SFTP, S3 or SMB | Filestash |
Quick answers to common questions
Software for storing, syncing, sharing and organising files, either as a sync-and-share platform or a document archive.
Nextcloud is the most common choice; Seafile and Syncthing suit specific sync needs.
Its repository is archived with no further releases or security fixes.
Both are AGPL-3.0 sync and share platforms; compare app ecosystems and commercial support options.
List it on TechLogHub and we'll review it for this guide.
