Threema

aid: threema
name: Threema
description: Threema is a secure messaging platform based in Switzerland that provides end‑to‑end encrypted communication
  for individuals and businesses. It offers products such as Threema Work, Threema OnPrem, and Threema Private, all GDPR‑compliant
  and designed for high‑security environments like public authorities, healthcare, and finance. The service emphasizes data
  sovereignty, zero‑knowledge security, and compliance with regulations such as NIS2 and DORA, making it a trusted alternative
  to mainstream messengers.
url: https://raw.githubusercontent.com/api-evangelist/threema/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- Messaging
- Security
- Privacy
- GDPR
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/threema-plans-pricing.yml
- type: Conformance
  url: conformance/threema-conformance.yml
- type: LLMsTxt
  url: llms/threema-llms.txt
- type: SecurityTxt
  url: well-known/threema-security.txt
- type: WellKnown
  url: well-known/threema-well-known.yml
- type: Hosts
  url: hosts/threema-hosts.yml
- type: TermsOfService
  url: https://threema.com/en/tos
- type: Support
  url: https://threema.com/en/support/work
- type: SignUp
  url: https://threema.com/en/signup
- type: Security
  url: https://threema.com/en/why-threema/security
- type: PrivacyPolicy
  url: https://threema.com/en/privacy-note
- type: Pricing
  url: https://threema.com/en/pricing
- type: Newsroom
  url: https://threema.com/en/press
- type: ChangeLog
  url: https://threema.com/en/changelog
- type: Blog
  url: https://threema.com/en/blog
- type: VulnerabilityDisclosure
  url: security/threema-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/threema-domain-security.yml
- type: Website
  url: https://threema.com/
apis:
- name: Threema API
  description: Threema provides secure messaging APIs for integration, described on their website.
  humanURL: https://threema.com/en
  aid: threema:threema-api
x-submission-probe: 301 (-> https://threema.com/) 2026-10-25
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Threema website provides only HTML documentation without a machine‑readable OpenAPI spec.
  evidence:
  - url: https://threema.com/openapi.json
    status: 404
  checked: '2026-10-27'
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 14
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local