Nertivia is an chat client that allows you to chat to anyone across the world. There are a lot of features that don't require you to pay at all such as, gif profile pictures, free custom emojis and more coming soon!
Nertivia vs Google Voice opinions
It's a chat app, not a virtual phone number service.
Access phone numbers from any device with internet: supports voice, SMS, MMS (pictures and group texting). Entirely open source stack and works over open protocols (XMPP).
JMP.chat vs Google Voice opinions
Open source, freedom, respects my privacy