Portal Review
Bitcoin hardware wallet in credit card form
Portal is what Tangem should have been. Credit card form factor with an actual e-ink display for verifying transactions. Open-source firmware you can audit. Bitcoin-only. No battery, just NFC power. It proves you can have portability without sacrificing security fundamentals.
Twenty Two Devices built Portal for one purpose: portable Bitcoin security. No altcoin support, no feature bloat. The e-ink display exists because you need to verify addresses on-device. That principle guided every design decision.
About Twenty Two Devices
Security Architecture
NFC-based signing with secure element. No battery required.
| Secure Element | Yes |
| Connection Methods | NFC only |
| Display | E-ink display |
| Passphrase Support | Yes |
| Multisig Support | No |
Trust Assessment
Reasons to Trust
- Credit card form factor
- Open-source firmware
- Bitcoin-only
- No battery needed
- E-ink display for verification
- Innovative design
Concerns
- Newer company
- NFC-only (requires compatible phone)
- Limited track record
- No multisig support yet
Where It Shines
Ultra Portable
Credit card size fits in any wallet. Most portable hardware wallet with display.
E-ink Display
Unlike Tangem, Portal has a display to verify addresses on device.
No Battery
Powered by NFC. Never needs charging, never degrades.
Open-Source
Firmware is open-source unlike other card-format wallets.
The Drawbacks
- New Product: Limited track record. Still proving itself in market.
- NFC Required: Must have NFC-capable phone. No other connection option.
- Limited Features: No multisig support currently. Simpler feature set.
Best For
- Users who prioritize portability
- Those who want card-format with display
- Open-source advocates
- Early adopters willing to try new products
Frequently Asked Questions
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Key Specifications
$99
7.5/10
Bitcoin-Only
NFC, Open Source, Compact
E-ink display
NFC only
My Final Take
Portal is the best card-format hardware wallet. Unlike Tangem, it has a display for address verification. Unlike closed-source competitors, the firmware is auditable. The NFC-only connection requires an NFC phone, and the newer company track record is a consideration. But the design fundamentals are sound. If you want credit card portability with actual security, Portal delivers.
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How Portal Compares
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