factually
Index/Organizations/Threema

Threema

Instant messaging smartphone app

Fact-Checks

3 results
Jan 28, 2026

Which messaging apps provide on-device-only key storage and anonymous registration (no phone number) similar to Signal or DuckDuckGo’s privacy goals?

A small set of modern messengers combine with registration that does not require a phone number or email: chief examples are , , and , while keeps keys on-device but requires a phone number for signup...

Dec 6, 2025

What are best-practice protocols for private investigators when working with encrypted-messaging evidence?

Private investigators should treat encrypted-messaging evidence as both a security asset and a legal challenge: industry guidance and vendor reviews show end‑to‑end encryption is now standard on leadi...

Dec 4, 2025

Which messaging apps offer end-to-end encryption for chats between users in Russia and Europe?

Signal, WhatsApp and several European apps (Wire, Threema, Session, Rocket.Chat-listed alternatives) offer end‑to‑end (E2E) encryption for user-to-user chats; Telegram does not encrypt ordinary chats ...