The 30-second summary
In 2026, three zero-knowledge clouds compete for the "privacy mainstream" space outside Big Tech: 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 deeper differences are real. They split on jurisdiction (Switzerland vs Canada 5-Eyes vs EU/Spain), business model (subscription vs lifetime), speed, certs, and ecosystem depth.
Here is the factual matrix, followed by a verdict by profile.
The 2026 technical matrix
| Criterion | Proton Drive | Sync.com | Internxt |
|---|---|---|---|
| Jurisdiction | Switzerland (Geneva) - outside 14 Eyes | Canada (Toronto) - 5 Eyes | Spain (Valencia) - EU/GDPR |
| Zero-knowledge | Default, all files | Default, all files | Default, all files |
| Algorithm | OpenPGP (AES-256 + RSA/ECC) | AES-256 + RSA-2048 | AES-256 + RSA-4096 + fragmentation |
| Post-quantum | Kyber-768 (Mail 2024, Drive roadmap 2026) | Not announced | Not announced |
| Open-source client | Yes (GitHub Proton) | No | Yes (GitHub Internxt) |
| Independent audit | SEC Consult (2021/2023/2025) | SOC 2 Type II + HIPAA | Securitum (2023) |
| 200 GB pricing | ~€5/month | ~€8/month | ~€4/month OR ~€89 lifetime |
| 2 TB pricing | ~€10/month | ~€15/month | ~€10/month OR ~€299 lifetime |
| 5-year cost (2 TB) | €600 | €900 | €600 OR €299 lifetime |
| Upload speed EU | ~22 Mbps | ~35 Mbps | ~28 Mbps |
| Native apps | Win/Mac/Linux/iOS/Android | Win/Mac/iOS/Android | Win/Mac/Linux/iOS/Android |
| Compliance | GDPR + HIPAA in progress | GDPR + SOC2 T2 + HIPAA + CCPA | GDPR (EU-native) |
| Free tier | 1 GB | 5 GB | 10 GB |
| Integrated ecosystem | Mail, Calendar, VPN, Pass | Sync Vault only | Drive only |
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 has the most mature ecosystem effect of the three. One Proton Unlimited subscription (€12.99/month) covers Mail, Calendar, Drive, VPN and Pass. That brings the real cost down if you fold in separate services (Mullvad VPN + Bitwarden + a privacy cloud = ~€20-25/month on their own).
The cryptographic architecture
Proton Drive encrypts each file with a unique AES-256 session key. That key is itself locked with the user's RSA-4096 or ECC Curve25519 public key. The public key is derived from the password via Argon2id (memory-hard, GPU-attack-resistant). File names, content metadata and thumbnails are encrypted too. Only file size and technical timestamps stay visible server-side.
Anyone can check this model. The client is open-source on GitHub (Android, iOS, web, desktop). SEC Consult Vienna audited it in 2021, 2023 and 2025, with public reports and documented fixed CVEs.
The post-quantum lead
This is the key difference in 2026. Proton is the only one of the three to ship hybrid post-quantum cryptography (Kyber-768 + X25519). It has run on Proton Mail since April 2024, and Proton Drive support is planned for late 2026. Some data must stay private for 15-20 years (journalistic archives, family medical records, trade secrets). For that data, this lead is the only real crypto edge Proton holds over its two rivals.
The limitations
Two clear limits. First, no lifetime plan - Proton runs on subscription only, so it is the priciest of the three over 5+ years at the 2 TB tier. Second, slower upload speed (~22 Mbps on EU home lines). That is the cost of full client-side OpenPGP encryption, which cannot be split across threads the way Internxt's fragmentation can.
Sync.com - the North American compliance pick
Sync.com is based in Toronto and was founded in 2011. From the start it aimed at compliance-aware B2B clients: healthcare, legal, finance. It holds a SOC 2 Type II certification (independent third-party auditor, annual report) and a HIPAA Business Associate Agreement (BAA available). That makes it the only one of the three able to handle 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 asked, because of zero-knowledge. But for a journalist the NSA targets by name, or a whistleblower under heavy protection, Proton's Swiss jurisdiction is still the better pick - 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 enough.
The performance edge
Sync.com has invested in its CDN since 2023. On a European home connection, upload speed reaches ~35 Mbps - 60% above Proton Drive. On North American connections, the gap is wider still (Sync.com has datacenters in Toronto and Montreal). For large backups (family photos, project archives), this speed gap matters day to day.
The limitations
No lifetime plan. No integrated ecosystem (email, VPN). The desktop client is not open-source. The price 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). It makes the strongest cost case through its lifetime plans. It is also the only EU-native provider of the three - Spanish jurisdiction, GDPR built in with no extra contract 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 with no add-on in all Internxt plans, including lifetime.
Risk to weigh: Internxt is a 5-year-old startup. Proton (12 years, profitable, thousands of employees) and Sync.com (15 years, profitable) are far more settled. Internxt is still in early-stage growth. A €299 lifetime plan carries the risk that Internxt shuts down before you earn the money back. This risk is not zero. But the terms of service include a data migration clause if the business closes.
The distributed architecture
Internxt uses a decentralized fragmentation architecture inspired by the Storj protocol. Each file is split into encrypted fragments spread across many nodes. This boosts resilience (no single point of failure) at the cost of slightly more coordination delay. The client is open-source, and the Securitum audit (2023) is public - the same openness as Proton.
Which jurisdiction for which risk profile
This is the most underrated decision factor in cloud comparisons:
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Switzerland (Proton Drive): outside both 14 Eyes AND 5 Eyes. The Federal Intelligence Act (LRens, revised 2024) requires sign-off from a federal administrative court before any disclosure. In 2024: 172 total formal requests (vs 216,000 at Google). Top protection for journalists, activists, lawyers under professional secrecy, and firms facing state-level rivals.
-
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 it via inter-agency deals. Fine 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 open to European judicial assistance. The same protection as Switzerland for most risks, plus the bonus of direct GDPR compliance with no international transfer frameworks.
Verdicts by profile
| Profile | Recommendation | Primary reason |
|---|---|---|
| Budget-conscious personal use | Internxt lifetime 2 TB (~€299) | 5-year cost cut in half, zero-knowledge included |
| Maximum privacy, high-risk | Proton Drive | Swiss jurisdiction + PQC + open-source + ecosystem |
| US healthcare / legal compliance | Sync.com | HIPAA BAA + SOC 2 Type II - contractually required |
| EU startup, simple GDPR compliance | Internxt | EU-native, direct GDPR, open-source client |
| Leaving Google/Apple, integrated suite | Proton Unlimited | Mail + Drive + VPN + Calendar + Pass in one license |
| Bulk migrations (>500 GB) | Sync.com | Superior upload speed (~35 Mbps EU) |
Our 2026 market read
The cloud privacy market has segmented into three distinct layers:
-
The "maximum trust" layer (Proton Drive, Tresorit): open-source, ultra-protective jurisdiction, public audits. The premium price makes sense for high-risk profiles.
-
The "B2B compliance" layer (Sync.com, Box enterprise): SOC2/HIPAA certs, contractual SLAs, professional tool integrations. The higher price makes sense for regulated sectors.
-
The "value privacy" layer (Internxt, Filen): zero-knowledge by default, open-source, cheap lifetime pricing. Profile: privacy-aware early adopter who can stomach startup risk.
The smart move for a demanding user: Internxt lifetime as primary storage (low long-run cost, zero-knowledge by default, EU GDPR) plus Proton Drive free 1 GB or a small subscription for ultra-sensitive files (wills, scanned passports, private keys) that gain from Swiss protection and PQC.
Related guides
To dig deeper, see our Sync.com review.
Try Proton Drive for free
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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.
Frequently asked questions
- Proton Drive, Sync.com or Internxt - which is the most secure in 2026?
- All three are zero-knowledge by default on all files. That puts them at the same crypto baseline (client-side AES-256). The differences sit elsewhere. Proton Drive is open-source and audited by SEC Consult (2025), so anyone can check the code line by line. Sync.com holds SOC 2 Type II and HIPAA certs. Internxt is open-source and audited by Securitum (2023), with the findings made public. For a 'hostile state' threat model, Proton wins on Swiss jurisdiction (LRens + a federal court is required). For a 'North American enterprise compliance' profile, Sync.com wins on certs.
- Does Internxt offer a competitive lifetime plan compared to pCloud?
- Yes. Internxt has offered lifetime plans since 2022: 200 GB at ~€89, 2 TB at ~€299, 5 TB at ~€499 (prices vary with promotions). The edge over pCloud Crypto: zero-knowledge is included by default with no add-on. That saves about €99 next to the pCloud Crypto add-on. The risk is similar too: Internxt must stay solvent. The company is based in Valencia (Spain) and was seeded in 2021. That makes it a younger startup than pCloud (founded 2013). Its money footing over 10 years is less proven.
- Is Sync.com genuinely outside US jurisdiction?
- Sync.com is based in Toronto, Canada (PIPEDA), outside the CLOUD Act and outside the 14 Eyes. But Canada is a 5 Eyes member (US-UK-CA-AU-NZ intelligence alliance). In practice, this means Canada can share intelligence with the US via Five Eyes deals. Yet data stored commercially is protected by PIPEDA. To hand it over needs a Canadian court order. The verdict: Sync.com is a valid shield against direct US demands. It is less robust than Switzerland or Spain (EU/GDPR), though, for journalists or activists who the NSA targets by name.
- Which platform offers the best upload and download speeds?
- On a European home connection (1 Gbps fiber, 2026 tests): Sync.com averages ~35 Mbps upload, Internxt ~28 Mbps, Proton Drive ~22 Mbps. Proton Drive's gap comes from the cost of full client-side OpenPGP encryption - every file is locked locally before it is sent. Internxt uses fragmentation (a Storj-like protocol). That boosts resilience but adds some coordination delay. On US connections, Sync.com leads by even more (its CDN is tuned for North America). For bulk uploads (>100 GB), Sync.com is the down-to-earth choice.
- Are these three providers GDPR-compliant for a European business?
- Proton Drive is the only one that guarantees Swiss server locations (GDPR Article 46 processing contracts). Internxt stores data in Spain (EU, GDPR-native). That is the simplest option for an EU company with no complex DPA setup. Sync.com stores data in Canada. The European Commission has deemed Canada 'adequate' (GDPR Art. 45 adequacy decision), so it is valid for EU data transfers without extra SCCs. All three work with GDPR, but Internxt offers the most direct EU compliance.
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