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Zalo vs LINE: catalog facts
Zalo	LINE
Free Free to download and use for messaging and calls.	Free Messages and voice and video calls are free.
Windows, macOS, Android, iOS	Android, iOS
Widely used in Vietnam, so most contacts there already have it Messaging and calling in one app	Free messaging and voice and video calls Widely used in several Asian countries
Official site is mostly in Vietnamese Closed source, run on the developer's servers	Closed source, centrally run service Mostly useful where contacts already use it
Downloadable app, Hosted service	Downloadable app
Closed source	Closed source
License not stated	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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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