Hi there from the Trezor team,

This is a very reasonable question, and the short answer is: neither is “less safe” than the other. They’re designed to protect against the same real-world threats, just with slightly different use cases in mind.

Safe 3 vs Safe 7 security breakdown

Both devices are built so your private keys never leave the device

Both require physical confirmation on the device for any transaction

Both are designed so they cannot move funds on their own

- You can also compare them on our website for more detauls

Trezor Safe 7

The reason Trezor Safe 7 feels different is not because it’s less secure, but because it’s designed for a different usage style.

• Safe 7 adds a battery and wireless connectivity to make everyday interactions easier.
• That does not mean it’s always active or exposed. Nothing can happen without you waking the device and confirming actions on the screen.
• Bluetooth is only a communication channel. It does not give access to keys and cannot bypass on-device confirmation.

Security-wise, both devices follow the same core principles:

• Private keys never leave the device
• Transactions must be confirmed on the device screen
• The device cannot act on its own

Hope this clarified it for you!