Internxt is the encrypted cloud storage provider that distinguishes itself on open-source clients. The product covers similar ground to ProtonDrive and Sync.com but uses an architecture (zero-knowledge with client-side encryption) that is auditable from end to end. For users who specifically want open-source code in their encrypted cloud stack, Internxt is one of the few options.
What Internxt is
Internxt is operated by Internxt Universal Technologies SL, a Spanish company headquartered in Valencia. The company has been operating since 2020 and has remained independently funded.
The product covers cloud storage (Internxt Drive), encrypted email (Internxt Mail in beta), and various adjacent services. The clients (web, desktop, mobile) are open source.
Pricing: Free tier (10 GB), Standard at $4/month for 200 GB, Plus at $5/month for 1 TB, Premium at $10/month for 2 TB. Lifetime plans are also offered (one-time payment for permanent access at the chosen storage tier), priced higher upfront but cheaper over multi-year horizons.
The infrastructure is European (Spain), with GDPR compliance built in.
What Internxt does well
The clients are genuinely open source. Code is on GitHub, you can build it yourself, and audit what the binary does. This is rare in the consumer encrypted cloud space; ProtonDrive’s clients are open source for some platforms, but Internxt’s open-source posture is more comprehensive.
The encryption model is genuine zero-knowledge. Files are encrypted client-side using AES-256 before upload. The encryption key is derived from your password and never leaves your device.
The pricing is competitive. $5/month for 1 TB is comparable to Sync.com, cheaper than ProtonDrive, dramatically cheaper than Tresorit.
The lifetime plan option is unusual and useful. For users who do not want recurring subscriptions, the one-time payment model is meaningful (around $200-500 for various storage tiers). Whether the company will exist long enough to honor lifetime plans is the open question.
The European jurisdiction (Spain) is favorable for users who specifically want non-US data hosting.
The open-source ecosystem includes interesting features (Internxt Send for encrypted file sharing, Internxt Photos for photo backup, all open source).
What Internxt does less well
The brand recognition is essentially zero outside privacy-tools circles. When you tell people you use Internxt, you spend time explaining what it is.
The product is younger than Sync.com or ProtonDrive. Some specific features (collaborative editing, advanced sharing controls) are less developed.
The mobile experience is functional but not as polished as ProtonDrive or Sync.com.
The desktop sync client occasionally has rough edges. Sync conflicts and edge cases are handled less smoothly than mature competitors.
The customer support is email-based, slow (multi-day responses sometimes), and limited to English and Spanish.
The lifetime plans create long-term company viability questions. If Internxt fails or is acquired, lifetime plan holders may lose service or have to migrate.
How Internxt compares
Versus Sync.com: Sync.com is more mature, more polished, similar pricing, closed source. Internxt is younger, less polished, similar pricing, open source. For users who specifically value open source: Internxt. For users who do not care about open source: Sync.com is more reliable.
Versus ProtonDrive: ProtonDrive is bundled with the broader Proton ecosystem. ProtonDrive’s web client is partially open source; Internxt’s is fully open. For users in the Proton ecosystem: ProtonDrive. For users specifically wanting open source standalone: Internxt.
Versus Tresorit: Tresorit is enterprise-focused, expensive, with compliance certifications. Internxt is consumer-focused, cheap, without enterprise features. For individual users: Internxt is better value. For enterprise compliance needs: Tresorit.
Versus self-hosted Nextcloud: Nextcloud is self-hosted (you run the server). Internxt is hosted (Internxt runs the server). For users wanting full self-hosting: Nextcloud. For users wanting hosted with open-source clients: Internxt.
Specific use cases
For users wanting open-source encrypted cloud at low cost: Internxt 1 TB Plus at $5/month.
For users who want to commit long-term and accept the company-viability risk: Internxt Lifetime plan.
For users in the Proton ecosystem: ProtonDrive (bundled with Proton subscription).
For users wanting maximum reliability from an established company: Sync.com.
For users wanting full self-hosting control: Nextcloud on your own infrastructure.
A specific recommendation
For users prioritizing open-source clients at low cost: Internxt Plus at $5/month for 1 TB.
For users who do not specifically value open source and want maximum reliability: Sync.com Solo Standard at $8/month for 2 TB.
For users in the Proton ecosystem: ProtonDrive (bundled with Proton subscription).
For most readers of this site: open-source clients are nice but not essential. Sync.com or ProtonDrive will serve most users better than Internxt’s smaller, less-mature ecosystem.
For users who specifically want open source: Internxt is the right answer despite the trade-offs.
Internxt | Sync.com | ProtonDrive
Related: Sync.com is the encrypted cloud nobody markets, The day I left Gmail