NGRAVE ZERO is the highest-certified consumer hardware wallet. EAL7 operating system certification, air-gapped by design, beautiful e-ink display. Premium price (~$399) for premium security.
What NGRAVE ZERO is
NGRAVE ZERO is a fully air-gapped hardware wallet manufactured in Belgium. It uses an EAL7-certified operating system — the highest security certification available for consumer electronics.
The e-ink display is beautifully designed and always shows the true state of the device (immune to fake-display attacks that theoretically threaten LCD-based competitors).
Perfect Keys generation
NGRAVE's "Perfect Keys" system claims to use multiple entropy sources during seed generation to eliminate any single point of manipulation. Whether this is meaningfully better than standard entropy is debatable, but it's a serious engineering commitment.
Verdict
NGRAVE ZERO is the highest-security consumer hardware wallet — premium price for premium security. For very high-value long-term storage, NGRAVE's certifications and design justify the cost.