Alternatives to Firefox Account Server

Syncthing

72,048

MPL-2.0

Syncthing is a revolutionary peer-to-peer file synchronization tool that eliminates the need for centralized cloud storage. It creates a secure, private network between your devices, ensuring your data remains under your complete control while providing seamless synchronization across all your devices.

Key Features

Peer-to-Peer Architecture:
- No central server required
- Direct device-to-device synchronization
- Decentralized network topology
- Automatic device discovery
- Relay servers for NAT traversal
- Local network optimization
Security & Privacy:
- End-to-end encryption (TLS 1.3)
- Device authentication with certificates
- No data stored on third-party servers
- Open-source and auditable code
- Privacy by design principles
- Secure device pairing
Synchronization Features:
- Real-time file synchronization
- Selective folder synchronization
- Intelligent conflict resolution
- File versioning and history
- Bandwidth limiting and scheduling
- Pause and resume capabilities
Folder Management:
- Flexible folder sharing
- Read-only and send-only folders
- Ignore patterns (.stignore files)
- Folder labels and descriptions
- Nested folder support
- Custom folder paths
Network Capabilities:
- Automatic local device discovery
- Global discovery service
- Custom discovery servers
- Relay server support
- UPnP port forwarding
- IPv6 support
User Interface:
- Clean web-based interface
- Real-time status monitoring
- Detailed synchronization logs
- Performance statistics
- Configuration management
- Mobile-responsive design
Advanced Features:
- REST API for automation
- Event-based notifications
- Custom relay servers
- Folder watchers
- Delta synchronization
- Compression support

Technical Specifications

Language: Go (Golang)
Protocol: Custom BEP (Block Exchange Protocol)
Encryption: TLS 1.3 with ChaCha20-Poly1305
Discovery: Local (UDP) and Global (HTTPS)
Platforms: Windows, macOS, Linux, Android, FreeBSD
Architecture: Single binary, no dependencies
API: RESTful HTTP API

Unique Advantages

True Decentralization: No reliance on cloud providers or central servers
Complete Privacy: Your data never leaves your devices except to go to your other devices
Zero Configuration: Works out of the box with minimal setup
Efficient Protocol: Only transfers changed blocks, not entire files
Open Source: Fully auditable and community-driven development

Nextcloud

29,737

AGPL-3.0

Nextcloud is a powerful, open-source file hosting and collaboration platform that puts you in control of your data. Originally forked from ownCloud in 2016, Nextcloud has evolved into a comprehensive solution that combines file storage, sharing, and synchronization with a rich ecosystem of collaborative tools and applications.

Key Features

File Storage & Sync:
- Cross-platform file synchronization
- Selective sync capabilities
- Version history and file recovery
- Collaborative file editing
- File sharing with permissions
- External storage integration
Collaboration Tools:
- Calendar and contact management
- Mail client integration
- Video conferencing (Nextcloud Talk)
- Project management (Nextcloud Deck)
- Real-time document collaboration
- Team workspaces
Security & Privacy:
- End-to-end encryption
- Server-side encryption
- Two-factor authentication
- Brute force protection
- File access control
- Activity monitoring and audit logs
Communication:
- Built-in chat and video calls
- Screen sharing capabilities
- Voice messages
- File sharing in conversations
- Integration with external chat systems
- Mobile push notifications
Office & Productivity:
- Online office suite (Collabora/OnlyOffice)
- Document templates
- Form builder
- Note-taking applications
- Password manager integration
- Bookmark management
Enterprise Features:
- LDAP/Active Directory integration
- Single sign-on (SSO) support
- Group and user management
- Quota management
- Compliance and governance tools
- Enterprise support options
Extensibility:
- Rich app ecosystem (200+ apps)
- Custom app development
- Theming and branding
- Workflow automation
- Third-party integrations
- API for custom solutions

Technical Specifications

Backend: PHP with Symfony components
Database: MySQL, MariaDB, PostgreSQL, SQLite
Web Server: Apache HTTP Server or Nginx
Frontend: Vue.js and JavaScript
Mobile: Native iOS and Android apps
Desktop: Cross-platform sync clients
Standards: WebDAV, CalDAV, CardDAV, LDAP

ownCloud

8,539

AGPL-3.0

ownCloud is a mature, enterprise-focused file sharing and collaboration platform that has been serving organizations worldwide since 2010. As the original open-source cloud storage solution, ownCloud provides a comprehensive suite of tools for secure file management, team collaboration, and enterprise integration.

Key Features

Enterprise File Management:
- Centralized file storage and organization
- Advanced file sharing with permissions
- File versioning and recovery
- File locking for collaborative editing
- Bulk file operations
- External storage integration
Collaboration Tools:
- Real-time document collaboration
- File comments and tagging
- Shared workspaces and projects
- Activity feeds and notifications
- Team calendars and contacts
- Integration with office suites
Enterprise Security:
- Server-side encryption at rest
- Client-side encryption options
- Two-factor authentication
- Granular access controls
- Antivirus scanning integration
- Data loss prevention tools
Identity & Access Management:
- LDAP and Active Directory integration
- Single sign-on (SSO) support
- Role-based access control
- Group management
- Guest user access
- API key management
Compliance & Governance:
- Comprehensive audit logging
- Data retention policies
- GDPR compliance tools
- Legal hold capabilities
- Workflow automation
- Custom branding options
Platform Integration:
- Microsoft Office integration
- LibreOffice Online support
- Calendar and contact sync
- Email integration
- Third-party app marketplace
- Custom app development
Mobile & Desktop:
- Native mobile applications
- Desktop sync clients
- Offline file access
- Automatic photo upload
- Mobile device management
- Remote wipe capabilities