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

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