Block has been building for bitcoin for over a decade. Cash App. Square. Proto. Sprial. And Bitkey. Our lane at Bitkey: self-custody that’s built for real life — security + recovery + privacy, without the tradeoffs. Because bitcoin deserves a full ecosystem.

Bitcoin

Bitcoin

Discover how Block advances bitcoin—Cash App and Square payments, Bitkey self-custody, and Proto mining—expanding access for millions worldwide

Buy bitcoin with Strike. Send it straight to Bitkey. That’s the post.

Self-custody shouldn’t require giving up your privacy. With Chain Code Delegation, Bitkey enables collaborative multisig without exposing balances or transaction history. Not our keys. Not our business.

Bitkey: Self-custody bitcoin wallet

Not our keys, not our business

How Bitkey used Chain Code Delegation to create the first private collaborative bitcoin wallet. Starting today, Bitkey users can enjoy the safety ...

Private by default. Not a setting. Anyone onboarding to Bitkey today gets a wallet we’ve provably never seen. Existing users can upgrade to get there too — new wallet, new descriptor, full privacy. Jonathan breaks this down further with Simply Bitcoin

No distractions. Just bitcoin.

Bitkey doesn’t use seed phrases. Not because recovery doesn’t matter, but because relying on one fragile backup creates a single point of failure. Self-custody should survive real life. Why we built it this way ↓

Bitkey: Self-custody bitcoin wallet

Learn about How Bitkey works in Bitkey Basics

Hardware wallets are essential. But they’re not the full answer to self-custody. Secure signing ≠ safe ownership. True self-custody has to account for loss, theft, coercion, inheritance — and real life. Our Product Lead, Jonathan breaks down why hardware alone isn’t enough, and what it takes to solve the whole custody problem 👇

Bitkey: Self-custody bitcoin wallet

Hardware wallets are not enough

Hardware is a critical component of self custody. But it only solves part of the problem. We all know the mantra: Not your keys, not your coins. ...

Collaborative multisig has always come with a privacy tradeoff. Chain Code Delegation removes it. Cosigners can help with recovery and policy enforcement—without seeing balances or transaction history. That’s a privacy win for the entire bitcoin ecosystem.

Chain Code Delegation: Improving privacy in collaborative multisig

Chain Code Delegation: Improving privacy in collaborative multisig

A Bitkey-backed proposal that removes the privacy–safety tradeoff in collaborative custody: recover and enforce policies without exposing wallet ...

Bitcoin MENA was special. Real conversations about bitcoin self-custody, privacy, and building for real life. Grateful for the community — onward to 2026.

Modern tools for modern money. Built for people who want control — without fragility.

Bitkey Bitcoin Wallet | Secure Wallets | Bitkey

A bitcoin wallet to own your private keys. Bitkey includes an app, hardware wallet, and recovery tools in case you lose your phone, or hardware, or...