Bitcoin is the world's most trusted network.
Stacks makes it do more.

$1T+ in security behind every transaction.

Stacks is the most widely adopted Bitcoin layer for smart contracts. Every Stacks block is cryptographically anchored to Bitcoin, inheriting the security of the most battle-tested blockchain in existence.Unlike sidechains or standalone L1s, Stacks doesn't just bridge to Bitcoin. It settles on Bitcoin. That means your transactions, contracts, and assets are backed by the full weight of Bitcoin's hashpower.

Fast blocks and Bitcoin-grade finality.

The Nakamoto upgrade, activated in October 2024, was the biggest milestone in Stacks history. It brought block times down from ~10 minutes to ~5 seconds and introduced 100% Bitcoin finality. That means once a Stacks transaction is confirmed, reversing it would require reorging Bitcoin itself. You get the speed of a modern L2 with the irreversibility of Bitcoin. It's the best of both worlds.

Your Bitcoin, working for you.

sBTC is a 1:1 Bitcoin-backed asset on Stacks. Deposit BTC and receive sBTC that you can use across DeFi, lending, and decentralized apps. When you're done, redeem it back for the exact same amount of BTC. sBTC is secured by a decentralized set of signers and is the key that unlocks Bitcoin for programmable finance. Launched December 2024, with over 5,000 BTC deposited.

A smart contract language designed to be predictable.

Clarity is the programming language that powers Stacks smart contracts. It's decidable, meaning you can know exactly what a contract will do before you execute it. No surprises, no hidden behavior, no reentrancy exploits. Clarity is also interpreted, not compiled, so the source code on-chain is exactly what runs. It can read Bitcoin state natively, letting contracts respond to BTC transactions directly.