Foundation Passport

Open-source Bitcoin hardware wallet with air-gapped QR signing and KeyOS apps

Visit foundation.xyz
Our score
Good
Price from $199
Firmware Fully open source
Connectivity QR code (air-gapped)
Bitcoin-only Yes

What is Foundation Passport?

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.

Who is behind it

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.

How Passport works

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.

Fees and availability

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.

Track record and risks

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.

Founders

Zach HerbertCofounder and CEO

Leads Foundation's product vision, company strategy, and mission to build Human Authority Hardware.

Ken CarpenterCofounder and CTO

Leads hardware engineering and firmware architecture for Passport and next-generation Foundation devices.

Jacob JohnstonCofounder and VP of Operations

Oversees supply chain, manufacturing, and operational infrastructure at Foundation.

Best for:Bitcoin long-term self-custodyAir-gapped QR signingOpen-source hardware usersKeyOS app experimentation

Pros and cons

Pros

  • Air-gapped QR signing keeps transaction approval separate from connected devices
  • Firmware is open source under GPLv3
  • Keylabs audited Passport Core in 2021 and Passport Prime in 2025
  • Passport Prime supports seed phrases, passwords and Nostr keys
  • KeyOS enables apps beyond Bitcoin transaction signing

Cons

  • Bitcoin-focused design excludes holders of other networks
  • Envoy is required for setup and firmware updates
  • Anti-tamper opening detection can erase the master key
  • The $259 Batch 2 price is higher than its $199 presale price

Our review

3.7/5
Good

Foundation Passport combines open-source, air-gapped Bitcoin custody with KeyOS credential tools, but it is focused on Bitcoin.

Security4.5
Build & design4.0
Ease of use3.5
Coin support2.5
Value for money3.5

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.

Listings are researched and drafted with AI assistance from public sources, then checked for accuracy and readability. Spot an error? Tell us. Editorial policy.
Sources (1)

Specs

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.

Key features

Air-gapped QR signing

Passport signs Bitcoin transactions through QR codes instead of a direct wired or wireless connection.

Open-source firmware

Passport hardware designs are licensed under CERN-OHL-S v2, while firmware is licensed under GPLv3.

KeyOS applications

Passport Prime runs KeyOS, a Rust microkernel with sandboxed apps and isolated processes.

Seed and password vault

The Vault app supports 12-word and 24-word seed phrases, passwords and Nostr keys.

Master Key backup

Items generated by Passport Prime can be recreated from a Master Key backup; imported items follow a different recovery path.

Envoy companion app

Envoy handles Passport setup and firmware updates, with releases also published through GitHub and Foundation's support site.

Anti-tamper reset

Passport Prime can erase its master key when it detects an attempt to open the device, with restoration through KeyCards or seed words.

Inside Foundation Passport

Passport Prime

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

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

Envoy is the companion app for Passport setup and updates. Foundation also directs users to Envoy for firmware updates.

Vault

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 screenshots

Foundation’s homepage displays a hardware device image with navigation links and a Buy button
Foundation’s homepage displays a hardware device image with navigation links and a Buy button · Oct 20, 2026
Docs: Foundation’s documentation homepage with navigation, a search field, product images, and browsing options
Docs: Foundation’s documentation homepage with navigation, a search field, product images, and browsing options · Oct 20, 2026
Passport Prime: Passport Prime product page with device color selection and purchase controls
Passport Prime: Passport Prime product page with device color selection and purchase controls · Oct 20, 2026

What users say about Foundation Passport

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.

Top goods

  1. Offline signing 4 people 123
  2. Frequent software updates 3 people 123
  3. Easy setup and use 3 people 123
  4. Extensible app platform 3 people 123
  5. Open-source firmware and software 2 people 123

Top bads

  1. Passport Prime shipping delays 9 people 123
  2. Poor delay communication 6 people 123
  3. QR transfer difficulties 2 people 12
  4. Envoy required for onboarding 2 people 12
  5. Limited source-code auditability 2 people 123

In their own words

“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.”
Reddit · r/Bitcoin · Mar 30, 2026 · View post
“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.”
Reddit · r/FoundationDevices · Mar 29, 2026 · View post
“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.”
Reddit · r/FoundationDevices · Oct 22, 2025 · View post
“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.”
Reddit · r/FoundationDevices · Mar 10, 2026 · View post
“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.”
Reddit · r/FoundationDevices · Mar 13, 2026 · View post
“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.”
Reddit · r/FoundationDevices · Mar 21, 2026 · View post

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.

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Funding and investors

$16.5MTotal raised
1Round
2Investors
  1. Funding round Dec 2024 $6.4M
    Source

FAQ

Who founded Foundation Passport?

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.

How much does Foundation Passport cost?

Passport Batch 2 was priced at $199 during presale and $259 after shipping began. The Passport Founder's Edition was priced at $299.

Is Foundation Passport safe?

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.

Is Foundation Passport open source?

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.

What is KeyOS on Passport Prime?

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.

Latest from Foundation Passport on X

FOUNDATION
@foundationhq · 27K followers
Follow
Envoy 2.3.7 is now available.

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
Image attached to the post
2 10 40 3.2K View on X
IMPORTANT REMINDER

Some fraudulent websites linked to the recent phishing emails are still active. These sites have been reported, and we are working to have them taken down.

Please DO NOT click any suspicious links in emails or visit the websites they direct you to.

Foundation will NEVER ask for your recovery or seed phrase.

Our investigation is still ongoing, and we aim to share a full report as soon as possible.

If you've been personally affected, please contact our official support team. We're here to help however we can.

Here are Foundation's official links:
Website: https://t.co/YDUVAVyrSD
Support: https://t.co/feKEBTHhcL
Community Forum: https://t.co/KUWTYxejp0
9 8 40 3.5K View on X
INVESTIGATION UPDATE 2

In our last update, we said we would share how many people had personal information exposed once we could confirm it. We can now share those numbers.

Across our old WooCommerce store and our current Shopify store, records containing approximately 5,600 mailing addresses and 5,200 phone numbers, along with names and email addresses, were held in systems the attackers were able to reach. We cannot say for certain whether the attackers accessed all of these records, so we are treating all of them as potentially exposed. These records are a subset of our total customers.

Why the data was still there:
In our last update, we explained that copies of orders remained in old database tables after past migrations. We have since found that the 60-day redaction also did not cover every type of order, and that some customer details were stored in other parts of the store, such as abandoned carts and contact forms, that redaction never reached.

Addresses not in our records:
More than 5,000 of the email addresses that received phishing emails do not appear in our WooCommerce or Shopify customer records. Some match our support and hiring inboxes. Together with reports of details that were never shared with us, this makes us confident the attackers also used data from outside Foundation. We are still tracing where these addresses came from.

What we are doing:
Out of an abundance of caution, we are rotating all keys and secrets across our systems, including those we have no evidence were accessed.We are keeping a single copy of the legacy WooCommerce data offline as evidence for the investigation. Once the investigation is complete, that data will be permanently deleted.

We have found no evidence that this incident compromised Passport devices or the private keys they hold.

Never enter your recovery phrase into a website or share it with anyone, including someone claiming to be Foundation.

We will continue sharing confirmed findings and publish our full report when the investigation is complete.
23 15 119 15.5K View on X
INVESTIGATION UPDATE

Many of you have asked how personal information ended up in the phishing emails, particularly those who ordered from us years ago. Here is what we have found so far.

Phishing emails:
We have identified more than 23,000 phishing email attempts across our email systems, including 19,057 messages delivered through Mailgun and 1,503 messages sent through Google Workspace. Some addresses received multiple messages, and some attempts failed or were stopped before delivery.

These numbers do not tell us how many people had personal information exposed. We are still determining that number and will share it once we can confirm it.

Older orders and abandoned carts (WooCommerce):
Before moving to Shopify in May of this year, our store ran on WooCommerce. We had configured automatic redaction of customer details 60 days after shipping. When we viewed those orders in our store admin, the customer details were no longer visible and the orders showed as redacted.

During past database migrations, orders were copied into a new set of tables, but copies remained in the old tables. The redaction process updated the newer tables, which were also what our store admin displayed. Orders therefore appeared redacted even though older copies still contained personal information.

We also found personal information in other order and refund records, as well as abandoned carts. This included shipping details entered by someone who never completed a purchase. We are still checking the historical settings and redaction process to understand why these records retained data.

Those older records were held in systems the attackers were able to reach. We relied on the redaction shown in our admin dashboard, and we now know that was insufficient to verify that the underlying data had been removed. Whatever the shortcomings in the tools we used, protecting your information was still our full responsibility.

We plan to share our findings with WooCommerce and the relevant plugin developers. When an order is marked as redacted, its personal information should not remain in another table in the same database.

For other WooCommerce store owners: do not rely solely on what your admin dashboard shows when personal data is redacted. Have your developer or agent check the entire database for information left behind, including legacy tables, refund records, and abandoned carts. This is especially important if you have used WooCommerce for years or have been through database migrations.

Recent orders (Shopify):
Customer details from orders placed on our Shopify store since May may also have been exposed. We are still investigating the extent of any unauthorized access.

These orders had not yet been manually redacted. We updated our privacy policy when we moved to Shopify and were building a tool to automate redaction, but automatic deletion was not yet active.

Other possible sources:
We have received reports of phishing emails containing personal details that customers say they never shared with us. We are investigating whether the attackers combined information from our systems with data obtained elsewhere, but we have not confirmed a connection to breaches at other companies. Historical support records are also part of our investigation.

What we have done:
We have revoked affected email credentials, cleared queued phishing messages, and taken affected legacy services offline while preserving evidence. Our investigation into the full extent of the compromise is continuing.

We have found no evidence that this incident compromised Passport devices or the private keys they hold. The phishing emails are designed to trick you into revealing your recovery phrase, and including your correct personal information makes them more convincing.

Never enter your recovery phrase into a website or share it with anyone, including someone claiming to be Foundation.

We will continue sharing confirmed findings and publish our full report when the investigation is complete.
37 37 168 41.4K View on X
ANNOUNCEMENT: SPAM EMAILS HAVE BEEN SENT THAT APPEAR TO HAVE COME FROM OFFICIAL FOUNDATION DOMAINS.

We have traced this back to one or more compromised API keys on Cloudflare, and have already revoked all API keys.

The malicious domain in the spam email has been taken down.

Funds stored on Passport are safe and Passport hardware is not compromised.

We are working nonstop to discover exactly what happened and will put out a report ASAP.
101 174 508 168.9K View on X

Recent public posts from @foundationhq, shown as published. Not reviewed or endorsed by CryptoReview.

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