Google Fi vs. Google Voice — What's the Difference?

Google Fi is a telecommunications service by Google that provides telephone calls, SMS, and mobile broadband using cellular networks and Wi-Fi. It is known for its unique billing model based on usage and its ability to switch between different networks for the best service. Google Voice, on the other hand, is a VoIP (Voice over Internet Protocol) service that provides users with a phone number for making calls, sending texts, and receiving voicemails over the internet.

Google Fi operates as a mobile virtual network operator (MVNO), utilizing networks from established carriers. It offers international coverage and is designed to simplify the data plan and billing. Google Voice focuses more on providing a secondary phone number that can be used across multiple devices via an app or a web interface, allowing for calls and texts over Wi-Fi or cellular data.

Google Fi requires a subscription and is compatible with specific phones that can switch between networks. It offers various plans, including unlimited and flexible plans that adapt to data usage. Google Voice is free for personal use (in the U.S.) and integrates with other Google services like Gmail and Google Meet, offering features like voicemail transcription.

Google Fi is primarily a cell service for users needing a regular mobile plan with the added benefit of network switching and straightforward international usage. Google Voice is more suited for users who want a secondary phone number for business or personal use, without the need for a traditional carrier.

Google Fi subscribers receive a SIM card for their device, while Google Voice users do not require a SIM card as the service is linked to a Google account and operates over the internet or through the app.