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Mattermost: what they publish

mattermost.com · Customer communities · checked 2026-10-16

52/100DBand D

Rank 7 of 30 in Customer communities, where the median is 22.

Public transparency score, not a product or security rating. Latest check: 2026-10-16. 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

3 days since the newest dated result, 3 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

Mattermost

mattermost.com · Customer communities

  1. A
  2. B
  3. C
  4. D
  5. E
  6. F
D 52of 100 Rank 7 of 30

Published commitments6 of 9 found

Measured behaviour0 of 3 found

Checked 2026-10-16. 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 Mattermost has no such document.

Where Mattermost sits in Customer communities

  1. A0 0%
  2. B1 3%
  3. C3 10%
  4. D5 17%
  5. E4 13%
  6. F17 57%
30 vendors with a score; 4 more without a score because we could measure too little. Bands have fixed thresholds, see how the score works.

The band of Mattermost 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 Mattermost 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

✗

Data processing agreement (DPA)

weight 3 of 3

No data processing agreement found.

Checked 8 addresses on 2026-10-16.

Show the 8 addresses we checked
  1. https://mattermost.com/legal/dpa – reached, no match (HTTP 404)
  2. https://mattermost.com/dpa – reached, no match (HTTP 404)
  3. https://mattermost.com/legal/data-processing-agreement – reached, no match (HTTP 404)
  4. https://mattermost.com/data-processing-agreement – reached, no match (HTTP 404)
  5. https://mattermost.com/legal/data-processing-addendum – reached, no match (HTTP 404)
  6. https://mattermost.com/legal/gdpr – reached, no match (HTTP 404)
  7. https://mattermost.com/trust/dpa – reached, no match (HTTP 404)
  8. https://mattermost.com/privacy/dpa – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: Data processing agreement in Customer communities: 7 of 32 companies

✗

Public pricing with figures

weight 2 of 3

No public pricing with figures found.

Checked 5 addresses on 2026-10-16.

Show the 5 addresses we checked
  1. https://mattermost.com/pricing – reached and rendered, no match
  2. https://mattermost.com/pricing/ – reached, no match (HTTP 200)
  3. https://mattermost.com/plans – reached, no match (HTTP 200)
  4. https://mattermost.com/en/pricing – reached, no match (HTTP 404)
  5. https://mattermost.com/pricing-plans – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: Public pricing in Customer communities: 17 of 32 companies

✗

HTTPS enforced with HSTS

weight 2 of 3

No enforced HTTPS with HSTS found.

Checked 2 addresses on 2026-10-16.

Show the 2 addresses we checked
  1. http://mattermost.com/ – redirects to https://mattermost.com/
  2. https://mattermost.com/ – no HSTS header

Is this wrong? Send us the URL

Across the market: HTTPS enforced with HSTS in Customer communities: 19 of 33 companies

✗weight 2 of 3

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

Checked 1 address on 2026-10-16.

Show the 1 address we checked
  1. https://mattermost.com/ – third-party requests before any interaction: browser.sentry-cdn.com, cdn.cookielaw.org, fast.wistia.com, p.typekit.net, pagead2.googlesyndication.com, region1.google-analytics.com, use.typekit.net, www.googletagmanager.com

Is this wrong? Send us the URL

Across the market: No third-party tracking before consent in Customer communities: 3 of 33 companies

✗

Uptime SLA with a figure

weight 1 of 3

No uptime figure found.

Checked 6 addresses on 2026-10-16.

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

Is this wrong? Send us the URL

Across the market: Uptime SLA with a figure in Customer communities: 0 of 31 companies

✗

security.txt (RFC 9116)

weight 1 of 3

No security.txt found.

Checked 1 address on 2026-10-16.

Show the 1 address we checked
  1. https://mattermost.com/.well-known/security.txt – reached, no match (HTTP 404)

Is this wrong? Send us the URL

Across the market: security.txt (RFC 9116) in Customer communities: 3 of 30 companies

Evidence

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

Published, with a source 6
✓

Subprocessors: the published list

weight 3 of 3

The actual list is published, not just a promise to keep one.

Source: https://mattermost.com/subprocessors/ · checked 2026-10-16

Across the market: Subprocessor list in Customer communities: 7 of 32 companies

✓

Data location: where they say data is hosted

weight 3 of 3

The hosting location is stated on a public page.

  • Locations named next to the hosting wording United States. This does not establish the company’s headquarters.
    Show the exact wording

    International Data Transfers and Storage Mattermost may process and store information in the United States and other countries where we or our service providers operate.

    Read at https://mattermost.com/privacy-policy/

Source: https://mattermost.com/privacy-policy/ · checked 2026-10-16

Across the market: Data location stated in Customer communities: 8 of 32 companies

✓

Status page with incident history

weight 2 of 3

A public status page with incident history.

Source: https://status.mattermost.com/ · checked 2026-10-16

Across the market: Status page with history in Customer communities: 15 of 34 companies

✓

Notice before subprocessors change

weight 2 of 3

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

Source: https://mattermost.com/subprocessors/ · checked 2026-10-16

Across the market: Notice before subprocessors change in Customer communities: 6 of 30 companies

✓

Certifications named (SOC 2, ISO 27001)

weight 1 of 3

SOC 2 or ISO 27001 named on a public page.

  • Named on that page ISO/IEC 27001, SOC 2 Type II.
    Show the 2 exact wordings

    olicy Featured Documents SOC 2 Type II Report (2025) Mattermost SOC 2 Bridge Letter 2026 Mattermost ISO 27001 (2022) Certificate pdf 2025: Mattermost Mobile Retest 2025: Mattermost Enterprise Retest 2...

    Read at https://trust.mattermost.com/

    solution (SSO) to manage employee access Has a status page Has a privacy policy Featured Documents SOC 2 Type II Report (2025) Mattermost SOC 2 Bridge Letter 2026 Mattermost ISO 27001 (2022) Certifica...

    Read at https://trust.mattermost.com/

Source: https://trust.mattermost.com/ · checked 2026-10-16

Across the market: Certifications named in Customer communities: 5 of 32 companies

✓

Named privacy contact (DPO or privacy address)

weight 1 of 3

A data protection officer or a dedicated privacy address is named.

Source: https://mattermost.com/privacy-policy/ · checked 2026-10-16

Across the market: Named privacy contact in Customer communities: 10 of 30 companies

History

100 0 2026-10-09: 52 of 1002026-10-16: 52 of 100 2026-10-09 2026-10-16
Score over the last 2 runs we measured Mattermost in: 52 (2026-10-09), 52 (2026-10-16).

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.

Mattermost

6 found · 6 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: 2026-10-16.

Investigate 6 open evidence questions
  1. Data processing agreement

    Please share the current data processing agreement for the product and plan we are considering, including its annexes and signing process.

    Inspect this check
  2. Public pricing

    Please confirm the total cost for our seats and usage, including minimum commitments, add-ons, overages and renewal terms.

    Inspect this check
  3. 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
  4. 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
  5. 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
  6. security.txt (RFC 9116)

    Where should we report a vulnerability, and what acknowledgement and follow-up process should we expect?

    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.