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LINE vs Threema: catalog facts
LINE	Threema
Free Messages and voice and video calls are free.	Paid A one-time purchase is required. Business plans are separate.
Android, iOS	Windows, macOS, Linux, Android, iOS, Web
Free messaging and voice and video calls Widely used in several Asian countries	No phone number or email required; the ID is random Apps are open source and the company is based in Switzerland
Closed source, centrally run service Mostly useful where contacts already use it	A one-time purchase is required for each platform Smaller user base than the mainstream encrypted messengers
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.