Jade is Blockstream's answer to the question of why a signing device should cost as much as a phone. The firmware is open, the company is Bitcoin-native with a long engineering record, and the price is a third of the premium devices.
The virtual secure element
Rather than a certified secure chip, Jade encrypts the key with a secret split between the device and Blockstream's server, so extracting the flash memory alone yields nothing usable. It is a real design rather than a marketing claim, and it introduces a dependency: full functionality assumes the oracle service exists. Blockstream provides a self-hosted option and the seed remains standard BIP39, so recovery never requires the company — but the physical security model is weaker than a certified element.
Air-gapped mode
Jade supports QR-based signing as well as USB, so users who want isolation can have it without buying a more expensive device. Paired with Sparrow or Green, the workflow is straightforward.
Coverage
Bitcoin and Liquid only. That focus keeps the firmware small and auditable, and it rules the device out for anyone holding anything else.
Who should use it
Bitcoin holders wanting open firmware on a budget, users building multisig quorums who want vendor diversity cheaply, and anyone buying a first device to learn on before committing to something more expensive.