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Keystone review

Updated September 28, 2026 · SumCue Editorial Team · Facts checked September 26, 2026

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Our verdict

Keystone is a hardware wallet for anyone who wants to hold their own keys rather than trust a provider, and the firmware is open source. The single cost is $149, and because coins sit in self custody the device and your backup carry the whole responsibility.

Key facts

Best for
Self-custody of a long coin list on a hardware device bought once at $149
Wallet type
Hardware↗
Price
$149↗
Custody
Self custody↗
Coins supported
5,500↗
Secure element
3 secure element chips↗
Open source
Yes↗
Backup options
Seed, Shamir↗
Legal entity
Yanssie HK Limited↗
Headquarters
Hong Kong↗
Founded
2018↗
Support channels
Email, Help-centre, Community↗
Features
Self-custody
Official website
keyst.one

Facts checked September 26, 2026, 4 sources

Apps and profiles

Elsewhere
TrustpilotXgithub.com

Pros and cons

Pros

  • Holdings are in self custody, so no provider holds the keys.
  • The firmware is open source, so the code that touches keys can be inspected.
  • Backup options are seed and shamir, giving a seed and split shares to choose between.

Cons

  • Support is limited to email, help centre and community, so a locked device has no live channel listed.
  • At $149 it costs more than the $79 Trezor alternative, and self custody puts recovery on the holder.
  • Only 9.5% of the wallets listed are hardware, so direct price rivals are few.
Keystone

Ready to try Keystone?

Scored 8.9 / 10 by SumCue.

See alternatives

Who it suits

  • Holders of a long tail of coins who want self custody on a device they own.
  • Buyers who want an open source design and seed and shamir backup choices.
  • Users ready to pay $149 once and store the device safely.

Who should look elsewhere

  • eToro, if a mobile app wallet suits day to day use better.
  • VaultLeap, which is mobile and needs no device to carry.
  • Trezor, at $79, when the lower outlay matters more than 3 secure element chips.

How it compares on our data

On coin support, Keystone places 9 out of 111 brands ranked, which is the stronger side of the picture. Price sits the other way at 109 of 121. Hardware wallets sit near the top of the price ranking, so the low rank there reflects the product type rather than a deal on offer.

How Keystone compares

Frequently asked questions

Is Keystone a hardware wallet or a mobile wallet?+

It is a hardware wallet, so keys are created and used on the device itself rather than in a phone app. Coins sit in self custody, which means the holder, not a company account, controls them.

What does the Keystone cost?+

The device is priced at $149 as a one-off purchase, and the 3 secure element chips come with it. There is nothing to pay after that, since holdings stay in self custody and need no provider to keep them safe.

How many coins and tokens can I keep on it?+

Keystone supports 5,500 coins and tokens, well above the 46 typical across wallets on the site. It ranks 9 of 111 brands on that measure, putting coin reach among the wider lists on the market.

What happens if the device is lost?+

Backups are seed and shamir, so a written seed and Shamir shares are both covered. You restore from that backup yourself, and self custody means the company cannot unlock the holdings for you or reset access.

Is the firmware open source?+

Yes, the firmware is open source, so anyone can read the code that handles keys and builds transactions. Open source models are the 73% on the site, so this design sits in the majority.

How do I get help if the device stops working?+

Support runs on email, help centre and community, so email, the help centre and the community are the routes listed. No phone line or chat appears in that mix, which matters when a device is locked and the funds cannot wait.

Who runs Keystone and where is it based?+

The company is Yanssie HK Limited, based in Hong Kong, and it has made wallets since 2018. It sells a device rather than holding accounts, so coins stay in self custody with the holder.

Should I pick a hardware wallet or a mobile wallet?+

A hardware wallet suits coins held for the long term, while mobile and mobile wallets suit phone-first use. Keystone is hardware and open source, so the keys stay on a device you own.

Sources

  • keyst.one checked September 26, 2026

    Backs: Wallet type

    “Keystone secures your digital assets with an 100% open source air-gapped cold wallet built for true self-custody”

  • keyst.one/about-us checked September 26, 2026

    Backs: Custody, Features, Founded, Headquarters, Legal entity, Support channels

    “Keystone products operate as non-custodial tools. This means that: We do not store or control your cryptocurrencies”

  • keyst.one/shop/products/keystone-3-pro checked September 26, 2026

    Backs: Backup options, Open source, Price, Secure element

    “Shamir Backup ... Support 3 Seed Phrases”

  • keyst.one/supported-wallets-and-assets checked September 26, 2026

    Backs: Coins supported

    “5500+ Coins & Tokens”

Compiled from 4 source pages, checked September 26, 2026. We did not open an account.

Keystone

Keystone

Self-custody of a long coin list on a hardware device bought once at $149

8.9/10See alternatives