Recently I learned about a second cold storage technology, the seed phrase stored on a credit card-like card making use of NFC to 'talk' with a smartphone wallet. Companies such as Arculus and Tangem offer such wallets. Like most of us, I knew about the technology used by Trezor and Ledger, based on hardware with its own wallet on said hardware.

From UX point of view, I really like the credit card-like seed phrase storage with the smartphone app. Though am wondering if this technology is at least as secure as a Trezor/Ledger wallet. Thus far I wasn't able to find an independent review between such technologies and cold storage wallets. Obviously, Arculus and Tangem claim they have better technology than Trezor and Ledger. But is this true?

Useful links:

Arculus: https://www.getarculus.com/
Tangem: https://tangem.com/en/
Trezor: https://trezor.io/
Ledger: https://www.ledger.com/

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