Foundation Passport Review 2026: Air-Gapped Bitcoin Wallet
The Foundation Passport is a Bitcoin-only, air-gapped hardware wallet built by Foundation Devices, a US-based company. It's positioned for users who want maximum security and are willing to pay for it and learn how to use it properly.
What Is the Passport?
The Passport is a hardware wallet designed to never connect to a computer via USB for transaction signing. It uses a QR code workflow — you display a transaction on your computer screen, the Passport scans it, signs it, and displays a QR code back for you to scan. The device stays completely air-gapped during use.
Key Specs
- Bitcoin-only
- Air-gapped by default (no USB signing)
- QR code workflow (also supports microSD)
- Color touchscreen
- Secure element (ATECC608A)
- Removable battery (AAA batteries)
- Open-source hardware and firmware
- Built in the USA
- Removable camera for QR scanning
Air-Gap Operation
This is the Passport's defining feature. The signing workflow looks like this:
- Create an unsigned transaction in Envoy (Foundation's app) or compatible wallets
- Display the PSBT as a QR code on your screen
- Scan it with the Passport's camera
- Review transaction details on the Passport screen
- Approve on the Passport
- Passport displays a signed transaction QR code
- Scan that QR with your computer to broadcast
The private key never touches an internet-connected device. This eliminates the USB attack surface entirely.
Envoy App
Foundation makes Envoy, a companion app for iOS and Android. It handles the QR workflow, displays balances, and manages accounts. It's clean and well-designed. Passport also works with Sparrow Wallet for desktop users.
Open Source Everything
The hardware design, firmware, and companion app are all open source. This is a meaningful differentiator — it's genuinely auditable in a way that closed-source alternatives aren't.
Build Quality
The Passport feels premium. It has a metal enclosure, a good-sized color touchscreen, and physical buttons. The AAA battery design means you're not dependent on proprietary charging — helpful for long-term storage scenarios. The camera used for QR scanning is a separate module that can be removed.
Price
The Passport is priced at the premium end. Check the current price on the Foundation Devices website. It's more expensive than a Trezor or Jade but comparable to a Coldcard.
Who Is It For?
The Passport is a strong choice if:
- You want true air-gap security with a polished user experience
- You're storing a significant amount of Bitcoin long-term
- You value open-source hardware
- You want a US-based manufacturer
- You want QR workflow without building a Coldcard setup from scratch
It's probably overkill if:
- You're storing smaller amounts and USB connection is acceptable
- You want the lowest-cost option
- You prefer a more beginner-friendly companion app
Passport vs Coldcard
Both are air-gap capable Bitcoin-only wallets. Coldcard uses microSD primarily (though newer versions support QR). Passport uses QR codes primarily. Passport has a more polished UI and is easier to set up. Coldcard is more battle-tested. Coldcard's Mk4 also has additional security features like the duress PIN.
Verdict
The Foundation Passport is one of the best hardware wallets for serious long-term Bitcoin storage. The air-gap design, open-source ethos, and premium build quality are all compelling. If you're storing a meaningful amount of Bitcoin and want to go beyond a standard USB-connected hardware wallet, this is worth serious consideration.
Also see: Trezor vs Coldcard | Bitcoin Custody Options | Bitcoin Security Checklist