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Trillian vs Threema Work: catalog facts
Trillian	Threema Work
Freemium Free for individuals, with paid plans for businesses and healthcare.	Paid Paid business licences, with a 30-day free trial.
Windows, macOS, Linux, Android, iOS	macOS
Apps for all major desktop and mobile platforms HIPAA-compliant plans for healthcare use	End-to-end encrypted messaging for business use Focus on data protection and compliance
Proprietary and closed source Business and healthcare features require a paid plan	Paid licences aimed at organisations, not individuals Separate from the consumer Threema app
Downloadable app, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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