Apps similar to Sync-in include Nextcloud, which is free and open source. Other options are Dropbox, Google Drive, MEGA and Ente Photos. There's no shortage of Cloud Storage Services like Sync-in, with more than 50 alternatives for the web, iPhone, Android, Windows and iPad.
PixelUnion is a privacy-focused, EU-based photo storage service alternative to Google Photos. It offers lossless uploads, free 16 GB starter storage, AI-powered face recognition, and more.
Netherlands
EU
Offers secure content management with workflow automation, AI-driven insights, 10GB free cloud storage, e-signature support, integration with 1,500+ apps, file-level security, offline access, document commenting, real-time search, and previews for 200+ file types.
United States
Encrypted, privacy-focused digital storage with zero-knowledge architecture supporting document editing, notes, journals, and photo storage with raw DSLR support, live sync, markdown, code, LaTeX, to-dos, audio, tables, EPUB, PDF, and cross-platform access.
EstoniaEU
Open source cloud platform for organizations with self-hosting, device file synchronization, sharing, versioning, secure encrypted storage, admin controls, web access, audit logging, and support for desktop and mobile clients for secure collaboration.
China
kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.
Switzerland
Lightweight, self-hosted encrypted cloud storage enabling fast uploads and downloads, easy Docker install, secure public link sharing, browser-side cryptography, searchable metadata, and low RAM footprint. Designed for privacy, performance, and file management.
CroatiaEU
End-to-end encrypted file synchronization and sharing on desktop and mobile, featuring admin controls, auditing, link-based sharing, two-factor authentication, offline access, granular permission management, and protection for sensitive workplace documents.
Switzerland
Lightweight file storage with a Rust backend and optimized binary for efficiency, offering responsive UI on desktop and mobile, simple setup, multilingual English and Spanish support, no PHP dependency, and designed for minimal resource use on home servers.
Trustless collaboration platform with decentralized file-sharing, collaborative editing, cheap storage, privacy controls, onchain team and community access, website and blog publishing, open workflows, customizable spaces, and alternatives to traditional online suites.
Singapore
Pydio is the mature alternative to Dropbox and Box.com, to build your own box, on your own servers.
FranceEU
Icedrive is a cloud storage, backup and file sharing service with browser, desktop and mobile apps.
The Icedrive desktop application allows users to mount their cloud storage space as a real hard drive.
United Kingdom
4Shared is a large online storage facility where Internet users store their text, audio, video, photo, and other files and share them, if they wish, with other people. It is easy, handy, and free! 15GB storage for the free account.
United States
