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NordLocker

NordLocker provides end-to-end encrypted cloud storage using AES-256, xChaCha20-Poly1305, and Ed25519 algorithms, built on a zero-knowledge architecture so the company itself cannot access stored files. It functions as both a local encrypted vault and a syncing cloud drive, letting users secure files locally and back them up to the cloud simultaneously.

Internxt

Internxt is a Spain-based cloud storage service built around zero-knowledge, client-side encryption, meaning files are encrypted on the user's device before upload so that not even Internxt can access their contents. It combines AES-256 encryption with post-quantum cryptography (Kyber-512) and offers apps for web, iOS, and Android, along with password-protected file sharing links. The service positions itself as a European alternative to large US cloud providers, citing GDPR compliance, ISO 27001:2022 certification, and an independent third-party security audit. Plans range from a free 1GB tier up to paid Essential, Premium, and Ultimate tiers offering 1TB, 3TB, and 5TB of storage respectively, available as annual subscriptions or one-time lifetime purchases, alongside separate business plans.

Sync.com

Sync.com provides end-to-end encrypted cloud storage that keeps your files private while allowing seamless syncing across devices. Its zero-knowledge architecture ensures only you can access your data, making it ideal for individuals and teams that prioritize security. The service includes collaboration tools such as shared folders, link permissions, and real-time file versioning, all accessible via web, desktop, and mobile apps. Sync.com offers a free tier with limited storage and paid subscription plans for expanded capacity and advanced admin controls.

Cryptee

Cryptee is an end-to-end encrypted platform for storing notes, documents, and photos, built by an Estonian company for users who want an alternative to mainstream cloud storage that does not have access to their data. All content is encrypted on the user's device using AES-256 before it ever leaves for Cryptee's servers, and the service supports Markdown-based documents, tables, code formatting, and offline access alongside encrypted photo storage with hashtag-based organization. The platform includes a distinctive privacy feature called ghost folders, which hide the existence of certain folders entirely so users can plausibly deny having them if coerced into unlocking their account. Cryptee runs entirely in the browser and is accessible on macOS, Windows, Linux, iOS, Android, and Chrome OS, with no analytics, cookies, trackers, or ads, and offers anonymous signup for users who don't want to provide any personal information.