This release includes a number of improvements and fixes as part of our ongoing work on Envoy.
Full release notes:
https://t.co/1joM2Braii https://t.co/7DRQESfUTz

Open-source Bitcoin hardware wallet with air-gapped QR signing and KeyOS apps
Foundation Passport is an open-source hardware wallet built around Bitcoin self-custody and air-gapped QR signing. The newer Passport Prime extends the device beyond transaction signing with KeyOS apps for 2FA codes, security keys, encrypted files and other digital approvals.
Foundation develops Passport and the KeyOS platform. Cofounder and CEO Zach Herbert leads product vision and company strategy. Cofounder and CTO Ken Carpenter leads hardware engineering and firmware architecture, while cofounder and VP of Operations Jacob Johnston oversees supply chain and manufacturing. Foundation raised $6.4 million in December 2024 in a round led by Fulgur Ventures, with participation from Arche Capital. Total funding was reported at $16.5 million.
Passport keeps signing separated from the companion device. QR codes provide the air-gapped connection, and Envoy handles setup and updates. Passport Prime runs KeyOS, a Rust microkernel operating system with sandboxed applications and isolated processes. The company says master keys remain protected on dedicated hardware.
Passport is designed for Bitcoin rather than a broad token catalogue. Its open-source hardware designs use CERN-OHL-S v2, and its firmware uses GPLv3. Passport Prime also has a Vault app for generating and storing seed phrases and passwords. Twelve-word and 24-word seeds are supported, and items generated by the device can be recreated from a Master Key backup.
Passport Batch 2 had a $199 presale price, which rose to $259 after shipping began. The Passport Founder's Edition was priced at $299 and included two industrial-grade microSD cards and two AAA batteries. Envoy is the companion app for setup and updates.
Foundation launched Passport Prime in December 2024 as its first Human Authority Hardware device. Cake Wallet became the first outside team shipping on KeyOS, giving its one million users a cold-storage experience through the Cake app for KeyOS. Keylabs independently audited Passport Core in 2021 and Passport Prime in 2025. Foundation publishes the audit reports and responses.
Physical access remains relevant, even with Passport Prime's anti-tamper protection, which can erase the master key after detecting an attempted opening. Bitcoin-only support limits its use for holders of other networks, while reliance on Envoy affects setup and firmware updates. The company, rather than a bank or custodian, leaves recovery responsibility with the owner.
Leads Foundation's product vision, company strategy, and mission to build Human Authority Hardware.
Leads hardware engineering and firmware architecture for Passport and next-generation Foundation devices.
Oversees supply chain, manufacturing, and operational infrastructure at Foundation.
Foundation Passport combines open-source, air-gapped Bitcoin custody with KeyOS credential tools, but it is focused on Bitcoin.
Foundation Passport is a self-custody hardware wallet built around Bitcoin, QR-based signing and the KeyOS operating system. Passport Prime adds 2FA codes, security keys, encrypted files and approval workflows, so it covers more than transaction signing. The core wallet experience remains Bitcoin-focused.
Passport uses air-gapped QR signing, keeps master keys on dedicated hardware, and runs KeyOS, a Rust microkernel with sandboxed applications and isolated processes. Passport Prime also has anti-tamper protection that erases the master key after an attempted opening. Foundation publishes the Keylabs audit for Passport Core from 2021 and the Passport Prime audit from 2025, along with its responses. Firmware is released under GPLv3, and the hardware designs use CERN-OHL-S v2.
QR signing avoids a direct USB or Bluetooth connection. Bitcoin is the documented focus, so a holder of many networks may need another device.
Zach Herbert, Ken Carpenter and Jacob Johnston lead the company, which raised $6.4 million from Fulgur Ventures and Arche Capital in December 2024, bringing reported total funding to $16.5 million. Passport Prime launched in that period, and the company has also shipped Passport Batch 2 and Envoy. Cake Wallet is the first outside KeyOS integration and brings the platform to its one million users.
Passport suits Bitcoin holders who value air-gapped signing, open firmware and a device that also stores credentials.
| Price from | $199 · unverified |
|---|---|
| Connectivity | QR code (air-gapped) · unverified |
| Firmware | Fully open source · unverified |
| Air-gapped signing | Yes · unverified |
| Bitcoin-only | Yes · unverified |
| Battery | Yes · unverified |
| Companion app | Envoy · unverified |
| Backup options | KeyCards, Seed words · unverified |
Not disclosed by the provider: KYC required, Secure element, Display, Supported assets, BIP39 passphrase, Multisig support, Touchscreen, NFC.
Data from the provider's website and public sources. Fees and availability change; confirm on the official site before you sign up.
Passport signs Bitcoin transactions through QR codes instead of a direct wired or wireless connection.
Passport hardware designs are licensed under CERN-OHL-S v2, while firmware is licensed under GPLv3.
Passport Prime runs KeyOS, a Rust microkernel with sandboxed apps and isolated processes.
The Vault app supports 12-word and 24-word seed phrases, passwords and Nostr keys.
Items generated by Passport Prime can be recreated from a Master Key backup; imported items follow a different recovery path.
Envoy handles Passport setup and firmware updates, with releases also published through GitHub and Foundation's support site.
Passport Prime can erase its master key when it detects an attempt to open the device, with restoration through KeyCards or seed words.
Passport Prime is Foundation's hardware platform for Bitcoin, identity, authentication, encrypted storage and high-stakes approvals. Its anti-tamper protection can erase the master key when the device detects an attempted opening.
KeyOS is the Rust microkernel operating system running on Passport Prime. Applications are sandboxed and processes are isolated. The KeyOS SDK supports Bitcoin spending policies and approval workflows.
Envoy is the companion app for Passport setup and updates. Foundation also directs users to Envoy for firmware updates.
Vault on Passport Prime stores seed phrases and passwords. It can generate 12- or 24-word seeds and passwords, or import existing seeds and passwords.
Foundation Passport uses open-source software and receives frequent updates. Current onboarding requires Envoy, while KeyOS source-code releases are harder for third parties to review.
“Passport Prime by Foundation, by far the superior to all these listed, premium build, fully open source, your grandma can use it, smartphone-like UI, foundation.xyz.”
“I agree. I would recommend the Core to people new to Bitcoin. Since the device is by far the easiest to set up and transact with, compared to Coldcard & Jade. The Prime in a great device however at $350 I can't recommend it to people just stating out in Bitcoin.”
“Sounds good! I’ve been very pleased with the Passport device. It’s a very user friendly device for want you intend. Don’t be worried about having accidentally set up a hot wallet, that’s how we figure things out.”
“Passport Prime ever going to ship? Last update I received was on 11/19/25, this was a “Final check in before shipping.” It would be nice to get a solid shipping date for the early adopters who have already paid. I purchased a Trezor 7 because I couldn’t risk leaving my cry on exchanges any longer.”
“It is - disappointing. They are plainly telling us what their marketing department wants us to hear rather than what the people making Prime believe. Over the period since December 2024 they have destroyed their credibility.”
“Best way to move coins/satoshis from Core to Prime? I'm encountering issues moving them out of the Core wallet. Keep receiving error message about wrong active key. I need some sort of flow chart or road map on the right steps. Using the QR codes doesn't seem to be working.”
Scam warning: Fake Envoy websites and downloads are being used in phishing attempts.
Scam warning: Users report fake support or app scams and recommend verifying links through official channels.
Based on 198 Reddit posts and comments from the last 12 months, checked Oct 18, 2026. These are posts by users on other sites, not reviews submitted on CryptoReview.
No user reviews yet. Have you used Foundation Passport? Share your experience below.
Foundation Passport was founded by Zach Herbert, Ken Carpenter and Jacob Johnston. Herbert is cofounder and CEO, Carpenter is cofounder and CTO, and Johnston is cofounder and VP of Operations.
Passport Batch 2 was priced at $199 during presale and $259 after shipping began. The Passport Founder's Edition was priced at $299.
Passport uses air-gapped QR signing, sandboxed KeyOS applications and dedicated hardware for master-key protection. Keylabs audited Passport Core in 2021 and Passport Prime in 2025, and Foundation publishes the reports and responses.
Yes. Foundation's firmware is licensed under GPLv3, while its hardware designs use CERN-OHL-S v2. KeyOS is a Rust microkernel with isolated processes and sandboxed applications.
KeyOS is Foundation's Rust microkernel operating system for Passport Prime. Its SDK supports apps for Bitcoin spending policies, identity tools, enterprise signing workflows and AI agent approval flows.

Recent public posts from @foundationhq, shown as published. Not reviewed or endorsed by CryptoReview.
NFC hardware wallet with 14,100+ assets across 90+ blockchains
Air-gapped hardware wallet with QR signing, a CC EAL5+ chip and 10,000+ assets
Open-source hardware wallets supporting 100+ chains and 30,000+ coins and tokens
Swiss-made open-source hardware wallet line launched in 2015 by Shift Crypto
Air-gapped hardware wallet with three secure-element chips and QR signing
Hardware wallets with Secure Element chips, 100+ chains and 15,000+ supported assets
Type at least two characters. Press ↵ to see all results.