Proton Drive vs Sync.com vs Internxt 2026: encryption, jurisdiction and price compared

The 30-second summary

In 2026, three zero-knowledge clouds compete for the "privacy mainstream" space outside Big Tech ecosystems: Proton Drive (Switzerland), Sync.com (Canada) and Internxt (Spain). All three encrypt files client-side before upload — neither the provider nor a state actor can read your data without your key. But the structural differences are real: jurisdiction (Switzerland vs Canada 5-Eyes vs EU/Spain), business model (subscription vs lifetime), speed, certifications, ecosystem depth.

Here is the factual matrix, followed by a verdict by profile.

The 2026 technical matrix

Proton Drive — the Swiss benchmark

Proton Drive reached GA in 2023, but the Proton infrastructure dates back to 2014 (ProtonMail, the first audited zero-knowledge email provider). By 2026, Proton Drive benefits from the most mature ecosystem effect of the three: a single Proton Unlimited subscription (€12.99/month) covers Mail, Calendar, Drive, VPN and Pass — bringing the effective cost down if you consolidate separate services (Mullvad VPN + Bitwarden + a privacy cloud = ~€20-25/month individually).

The cryptographic architecture

Proton Drive encrypts each file with a unique AES-256 session key, itself encrypted with the user's RSA-4096 or ECC Curve25519 public key derived from the password via Argon2id (memory-hard, GPU-attack-resistant). File names, content metadata and thumbnails are also encrypted. Only file size and technical timestamps remain visible server-side.

This model is independently verifiable: the client is open-source on GitHub (Android, iOS, web, desktop), audited by SEC Consult Vienna in 2021, 2023 and 2025 with public reports and documented resolved CVEs.

The post-quantum lead

This is the structural differentiator in 2026: Proton is the only one of the three to have deployed hybrid post-quantum cryptography (Kyber-768 + X25519) on Proton Mail since April 2024, with an extension to Proton Drive planned for late 2026. For data whose confidentiality must survive 15-20 years (journalistic archives, family medical records, trade secrets), this lead is the only real cryptographic differentiator between Proton and its two competitors.

The limitations

Two objective constraints: (1) no lifetime plan — Proton runs on subscription only, making it the most expensive of the three over 5+ years at the 2 TB tier; (2) slower upload speed (~22 Mbps on EU residential) — the cost of full client-side OpenPGP encryption, which cannot be parallelized the same way as Internxt's fragmentation approach.

Sync.com — the North American compliance pick

Sync.com is based in Toronto, founded in 2011, and positioned itself from the start on compliance-aware B2B clients: healthcare, legal, finance. Its SOC 2 Type II certification (independent third-party auditor, annual report) and HIPAA Business Associate Agreement (BAA available) make it the only one of the three capable of processing US healthcare data in 2026.

The Canadian jurisdiction: 5 Eyes but PIPEDA

Canada is a Five Eyes member (US-UK-CA-AU-NZ intelligence alliance). For most users, this changes nothing in practice — Sync.com cannot decrypt your data even if an agency demanded it, because zero-knowledge. But for a journalist specifically targeted by the NSA or a whistleblower under advanced protection, Proton's Swiss jurisdiction remains preferable — see our full breakdown of how 5/9/14 Eyes alliances affect cloud privacy.

For mainstream use cases (professional, SMB, personal medical records), Sync.com's PIPEDA + zero-knowledge protection is more than adequate.

The performance edge

Sync.com has invested in its CDN infrastructure since 2023. On a European residential connection, upload performance reaches ~35 Mbps — 60% above Proton Drive. On North American connections, the gap is even more pronounced (Sync.com has datacenters in Toronto and Montreal). For large-volume backups (family photos, project archives), this speed difference is meaningful day-to-day.

The limitations

No lifetime plan, no integrated ecosystem (email, VPN), non-open-source desktop client. Pricing is also the highest of the three (~€15/month for 2 TB vs €10/month at both Proton and Internxt on subscription).

Internxt — the best total cost of ownership

Internxt is the youngest of the three (founded 2020, based in Valencia, Spain) and offers the strongest economic case through its lifetime plans. It is also the only EU-native provider of the three — Spanish jurisdiction, GDPR embedded without additional contractual clauses.

The lifetime model: economic disruption

Internxt's 2026 pricing (varies with cyclical promotions):

• 200 GB lifetime: ~€89
• 2 TB lifetime: ~€299
• 5 TB lifetime: ~€499

Compared against 5 years of regular subscription:

• Proton Drive 2 TB: ~€10/month = €600 over 5 years
• Sync.com 2 TB: ~€15/month = €900 over 5 years
• Internxt 2 TB subscription: ~€10/month = €600 over 5 years
• Internxt 2 TB lifetime: ~€299 one-shot — breaks even at month 30

Unlike pCloud Crypto, zero-knowledge is included without an add-on in all Internxt plans, including lifetime.

Risk to assess: Internxt is a 5-year-old startup. Unlike Proton (12 years, profitable, thousands of employees) or Sync.com (15 years, profitable), Internxt is still in early-stage growth. A €299 lifetime plan carries the risk that Internxt ceases to exist before the investment is amortized. This risk is not zero — but the terms of service include a data migration clause in case of business cessation.

The distributed architecture

Internxt uses a decentralized fragmentation architecture inspired by the Storj protocol: each file is split into encrypted fragments distributed across multiple nodes. This improves resilience (no single point of failure) at the cost of slightly higher coordination latency. The client is open-source, and the Securitum audit (2023) is publicly disclosed — equivalent transparency to Proton.

Which jurisdiction for which risk profile

This is the most underrated decision factor in cloud comparisons:

• Switzerland (Proton Drive): outside both 14 Eyes AND 5 Eyes. The Federal Intelligence Act (LRens, revised 2024) requires authorization from a federal administrative court before any disclosure. In 2024: 172 total formal requests (vs 216,000 at Google). Maximum protection for journalists, activists, lawyers under professional secrecy, enterprises exposed to state-level competition.

• Canada (Sync.com): 5 Eyes — Canada shares intelligence with the US, UK, Australia and New Zealand. PIPEDA protects commercial data from direct demands, but an NSA-level adversary can route around via inter-agency agreements. Suitable for 99% of professional and personal use cases.

• Spain/EU (Internxt): GDPR-native, outside the 14 Eyes (Spain is not a member of the 5/9/14 Eyes alliances), but subject to European judicial assistance. Equivalent protection to Switzerland for most risks, with the bonus of direct GDPR compliance without international transfer frameworks.

Verdicts by profile

Our 2026 market read

The cloud privacy market has segmented into three distinct layers:

1. The "maximum trust" layer (Proton Drive, Tresorit): open-source, ultra-protective jurisdiction, public audits. Premium price justified for high-risk profiles.

2. The "B2B compliance" layer (Sync.com, Box enterprise): SOC2/HIPAA certifications, contractual SLAs, professional tool integrations. Higher price justified for regulated sectors.

3. The "value privacy" layer (Internxt, Filen): zero-knowledge by default, open-source, economical lifetime pricing. Profile: privacy-conscious early adopter, startup risk tolerance.

The smart strategy for an exacting individual: Internxt lifetime as primary storage (amortized cost, zero-knowledge by default, EU GDPR) + Proton Drive free 1 GB or minimal subscription for ultra-sensitive documents (wills, scanned passports, private keys) that benefit from Swiss protection and PQC.

Further reading

• Proton Drive review 2026 — complete pillar review
• Internxt review 2026 — full test of lifetime plans and performance
• Best encrypted cloud storage 2026 — our full ranking
• Encrypted cloud comparison quiz — still deciding between the three? Get your answer in 60 seconds
• 5/9/14 Eyes and cloud privacy — real jurisdictional impact

Published June 11, 2026. Upload speed tests conducted on 1 Gbps residential fiber connection in France, averages over 10 × 5 GB upload measurements per provider. Prices verified on official websites in June 2026. Disclosure: Priviy earns an affiliate commission on Proton Drive. No commission on Sync.com or Internxt at this time. Verdicts are independent of commissions.