A team of bitcoiners with a passion for security

Things we work on

Revault

A complete, sovereign and open-source institutional custody solution using Bitcoin smart contracts.

Liana

A modern day to day bitcoin wallet including inheritance solutions, safer backups, and more.

Our store

(Coming soon!)

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Both a physical location where we help people and companies with disaster recovery, and an online store providing products and services.

Let's talk

We are always happy to chat if you want to work with us, or have a problem that needs solving. We focus on security, with a strong emphasis on open source.

hello@wizardsardine.com

Our musings

Bitcoin

Inheritance

The state of Bitcoin inheritance planning

Having confidence in how you hold your own bitcoin keys is one thing to focus on but trusting that your heirs will safely receive your bitcoin holdings when you pass away is a very different task.

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Bitcoin

Liana

Liana third release

Announcing the third release of Liana with 'hot wallet' support

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Bitcoin

Liana

Multisig

Liana second release

Announcing the second release of Liana, now with multisig!

Read the article >