Today most hardware wallets depend on Secure Elements. A secure element is an element of hardware whose design is unknown. It is basically a form of security via obscurity.
A secure element, by its very definition, can not be open-source.
The Ledger company was hacked and lost personal information of customers
Ledger modified its code to force users to "backup" seeds with them
Trezor supports a very large number of cryptos. Thus requires frequent firmware upgrades.
Trezor has a seed-extraction exploit that can not be fixed reddit r/ethereum discussion TLDR An attacker with a stolen device can extract the seed from the device. It takes less than 5 minutes and the necessary materials cost around 100$
We can "ship" (electronically) anywhere without requiring any personal information
Our solution has Full open source code. No forced updates. Use your own hardware devices with a portable offline-capable app.
Deposit privately cross-chain on your new cold storage address using