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Google Voice vs VoIP.ms SMS: catalog facts
Google Voice	VoIP.ms SMS
Freemium Personal use is free where available; business use is a paid Google Workspace add-on plan.	Free The app is free and open source; a VoIP.ms account and number are paid separately.
Android, iOS, Web	Android
One number for calls, texts and voicemail on many devices Works in the browser and on Android and iOS	Familiar interface modelled on Google's SMS app Syncs with device contacts
Requires a Google account Business features need a paid Workspace plan	Only works with VoIP.ms numbers Push notifications only in the Google Play version
Downloadable app, Web application, Hosted service	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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