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Proton Drive: what they publish

proton.me · Cloud storage · checked 2026-10-15

43/100DBand D

Rank 4 of 23 in Cloud storage, where the median is 22.

Public transparency score, not a product or security rating. Latest check: 2026-10-15. How the score works.

Evidence at a glance

Choose a check to see its source, date and scope.

Not found means not found at the addresses we checked. Not measured means we could not complete the check.

Start a vendor reviewDownload evidence (CSV)

Overview

4 days since the newest dated result, 4 since the oldest. 12 of 12 criteria have a measured result in the last 30 days. Failed checks and undated results are excluded.

Evidence freshness is a statement about our measurement and is kept apart from the transparency score, which is frozen at v1. How good our own measurement is.

Transparency labelsaas-ranking.com

Proton Drive

proton.me · Cloud storage

  1. A
  2. B
  3. C
  4. D
  5. E
  6. F
D 43of 100 Rank 4 of 23

Published commitments4 of 9 found

Measured behaviour1 of 3 found

Checked 2026-10-15. Every line links the page we found it on. A cross means we found nothing at the addresses we checked, not that the vendor has no such document. A transparency score, not a product rating.

Downloads include all checks, source URLs, dates and the snapshot ID for your procurement file. We do not issue badges.

The label is the whole measurement in one object: every criterion with its weight, the band, and the date. Public transparency score, not a product or security rating.

Every line in it links the page we found the result on, or lists the addresses we checked. A cross means we found nothing there, not that Proton Drive has no such document.

Where Proton Drive sits in Cloud storage

  1. A0 0%
  2. B0 0%
  3. C1 4%
  4. D4 17%
  5. E5 22%
  6. F13 57%
23 vendors with a score; 5 more without a score because we could measure too little. Bands have fixed thresholds, see how the score works.

The band of Proton Drive is marked. Vendors without a score are the ones where we could measure too few criteria to rank them – a gap on our side, counted separately.

What Proton Drive states

The exact figures and names we read off the pages linked below, with the sentence they stand in. This is what they publish, not what we verified about their systems.

Gaps, heaviest first

✗

Subprocessors: the published list

weight 3 of 3

No subprocessor list found.

Checked 7 addresses on 2026-10-15.

Show the 7 addresses we checked
  1. https://proton.me/legal/subprocessors – reached, no match (HTTP 404)
  2. https://proton.me/subprocessors – reached, no match (HTTP 404)
  3. https://proton.me/sub-processors – reached, no match (HTTP 404)
  4. https://proton.me/legal/sub-processors – reached, no match (HTTP 404)
  5. https://proton.me/trust/subprocessors – reached, no match (HTTP 404)
  6. https://proton.me/privacy/subprocessors – reached, no match (HTTP 404)
  7. https://proton.me/legal/subprocessor-list – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: Subprocessor list in Cloud storage: 1 of 24 companies

✗

Data location: where they say data is hosted

weight 3 of 3

No statement about data location found.

Checked 7 addresses on 2026-10-15.

Show the 7 addresses we checked
  1. https://proton.me/security – reached, no match (HTTP 404)
  2. https://proton.me/trust – reached, no match (HTTP 404)
  3. https://proton.me/legal/privacy – reached, no match (HTTP 200)
  4. https://proton.me/privacy – reached, no match (HTTP 200)
  5. https://proton.me/privacy-policy – reached, no match (HTTP 404)
  6. https://proton.me/compliance – reached, no match (HTTP 404)
  7. https://proton.me/legal/privacy-policy – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: Data location stated in Cloud storage: 8 of 24 companies

✗

HTTPS enforced with HSTS

weight 2 of 3

No enforced HTTPS with HSTS found.

  • HSTS max-age 31536000 seconds (365 days).
    Show the exact wording

    max-age=31536000; includeSubDomains; preload

    Read at https://proton.me/
  • HSTS options includeSubDomains, preload.
    Show the 2 exact wordings

    max-age=31536000; includeSubDomains; preload

    Read at https://proton.me/

    max-age=31536000; includeSubDomains; preload

    Read at https://proton.me/

Checked 2 addresses on 2026-10-15.

Show the 2 addresses we checked
  1. http://proton.me/ – HTTP 403, no redirect to HTTPS
  2. https://proton.me/ – HSTS max-age=31536000

Is this wrong? Send us the URL

Across the market: HTTPS enforced with HSTS in Cloud storage: 16 of 27 companies

✗weight 2 of 3

Third-party requests seen on the first load, before any interaction.

  • Third-party hosts we saw on the first load 1 protonweb.com.
    Show the exact wording

    pmecdn.protonweb.com

    Read at https://proton.me/

Checked 1 address on 2026-10-15.

Show the 1 address we checked
  1. https://proton.me/ – third-party requests before any interaction: pmecdn.protonweb.com

Is this wrong? Send us the URL

Across the market: No third-party tracking before consent in Cloud storage: 3 of 26 companies

✗

Certifications named (SOC 2, ISO 27001)

weight 1 of 3

No named certification found.

Checked 6 addresses on 2026-10-15.

Show the 6 addresses we checked
  1. https://proton.me/security – reached, no match (HTTP 404)
  2. https://proton.me/trust – reached, no match (HTTP 404)
  3. https://proton.me/trust-center – reached, no match (HTTP 404)
  4. https://proton.me/compliance – reached, no match (HTTP 404)
  5. https://proton.me/legal/security – reached, no match (HTTP 404)
  6. https://trust.proton.me/ – The name "trust.proton.me" could not be resolved.

Is this wrong? Send us the URL

Across the market: Certifications named in Cloud storage: 7 of 26 companies

✗

Uptime SLA with a figure

weight 1 of 3

No uptime figure found.

Checked 6 addresses on 2026-10-15.

Show the 6 addresses we checked
  1. https://proton.me/legal/sla – reached, no match (HTTP 404)
  2. https://proton.me/sla – reached, no match (HTTP 404)
  3. https://proton.me/legal/service-level-agreement – reached, no match (HTTP 404)
  4. https://proton.me/trust/sla – reached, no match (HTTP 404)
  5. https://proton.me/uptime – reached, no match (HTTP 404)
  6. https://proton.me/legal/uptime-sla – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: Uptime SLA with a figure in Cloud storage: 1 of 23 companies

✗

Named privacy contact (DPO or privacy address)

weight 1 of 3

No named privacy contact found.

Checked 7 addresses on 2026-10-15.

Show the 7 addresses we checked
  1. https://proton.me/legal/privacy – reached, no match (HTTP 200)
  2. https://proton.me/privacy – reached, no match (HTTP 200)
  3. https://proton.me/privacy-policy – reached, no match (HTTP 404)
  4. https://proton.me/legal/privacy-policy – reached, no match (HTTP 404)
  5. https://proton.me/legal/privacy-notice – reached, no match (HTTP 404)
  6. https://proton.me/trust/privacy – reached, no match (HTTP 404)
  7. https://proton.me/datenschutz – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: Named privacy contact in Cloud storage: 7 of 24 companies

Evidence

The full source lists sit behind these two groups, so that the answer above stays readable.

Published, with a source 5
✓

Data processing agreement (DPA)

weight 3 of 3

Published and readable without a login.

Source: https://proton.me/legal/dpa · checked 2026-10-15

Across the market: Data processing agreement in Cloud storage: 3 of 25 companies

✓

Status page with incident history

weight 2 of 3

A public status page with incident history.

Source: https://status.proton.me/ · checked 2026-10-15

Across the market: Status page with history in Cloud storage: 9 of 25 companies

✓

Public pricing with figures

weight 2 of 3

Actual numbers on a public page.

Source: https://proton.me/pricing · checked 2026-10-15

Across the market: Public pricing in Cloud storage: 18 of 24 companies

✓

Notice before subprocessors change

weight 2 of 3

The vendor commits publicly to giving notice before the list changes.

Source: https://proton.me/legal/dpa · checked 2026-10-15

Across the market: Notice before subprocessors change in Cloud storage: 2 of 23 companies

✓

security.txt (RFC 9116)

weight 1 of 3

Served at /.well-known/security.txt.

Source: https://proton.me/.well-known/security.txt · checked 2026-10-15

Across the market: security.txt (RFC 9116) in Cloud storage: 4 of 24 companies

History

100 0 2026-10-08: 43 of 1002026-10-15: 43 of 100 2026-10-08 2026-10-15
Score over the last 2 runs we measured Proton Drive in: 43 (2026-10-08), 43 (2026-10-15).

Prepare your vendor review

A source is a starting point. Check the product, plan, legal entity and date before treating it as evidence for your purchase. These questions do not change the transparency score.

Proton Drive

5 found · 7 not found · 0 not measured across 12 public checks.

12 of 12 criteria have a measured result from the last 30 days. Oldest dated result: 2026-10-15.

Investigate 7 open evidence questions
  1. Subprocessor list

    Which subprocessors apply to our product, what does each process, and in which countries? Please share the current list.

    Inspect this check
  2. Data location stated

    Which locations apply to our primary data, backups and support access? Which region can we select for this plan?

    Inspect this check
  3. Certifications named

    Please share the current certificate or audit report and its scope, covered legal entity, products and validity period.

    Inspect this check
  4. Uptime SLA with a figure

    Which availability commitment applies to our plan? Please include the measurement window, exclusions and credit claim process.

    Inspect this check
  5. HTTPS enforced with HSTS

    How is HTTPS enforced on the product and sign-in domains we will use? Please distinguish those domains from the public website.

    Inspect this check
  6. No third-party tracking before consent

    Which third-party requests occur before a visitor makes a choice, and for what purpose? Please distinguish the public website from the product.

    Inspect this check
  7. Named privacy contact

    Which privacy contact handles requests for our account, and what escalation path should we use?

    Inspect this check

Compare

A shortlist holds up to six vendors across categories and lives entirely in the address of its page: share the link, bookmark it, put it in a ticket. Nothing is stored, so we do not know it exists.