The best open source alternative to Nextcloud is Ente Photos. If that doesn't suit you, our users have ranked more than 100 alternatives to Nextcloud and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Nextcloud are Filen, Proton Drive, ownCloud and Tuta Drive.
Open-source, end-to-end encrypted backup and sharing for photos and videos, multi-platform sync, original quality preservation, privacy-first design, collaborative albums, family sharing, secure external sharing, robust data replication, and device imports.
United States
Filen is a cutting-edge cloud storage provider that offers client-side, end-to-end, zero-knowledge encryption. Headquartered and operated entirely in Germany, Filen is at the forefront of combining comprehensive features with uncompromising privacy and security.
Germany
EU
Offering comprehensive privacy with end-to-end encryption, Proton Drive allows users to store, synchronize, and share files across various devices through web, desktop, and mobile apps. Free storage up to 5 GB, service remains open-source and audited, ensuring file content and access control.
Switzerland
Self-hosted option for secure file sync, sharing, calendars, contacts, and mail supporting mobile, desktop, web access and external storage, real-time collaboration, password-protected links, document editing, anti-virus scanning, and LDAP integration.
United States
End-to-end encrypted cloud storage with quantum-resistant cryptography protects files from all third-party access, including service providers, ensuring strict confidentiality for individuals and businesses, seamless web and mobile access, and compliance with EU data laws.
GermanyEU
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
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.
NetherlandsEU
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
kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.
Switzerland
Sync-in is a sovereign, open-source platform for file storage, sharing, synchronization, and collaboration. It is intended for individuals, businesses, public-sector entities, and institutions seeking a controlled, scalable solution suited to their operational requirements.
FranceEU
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
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
