Understanding what is Stacks starts with its design: STX is the native token of a Bitcoin layer-2 network that adds smart contracts and decentralized applications to Bitcoin while settling on the Bitcoin chain. STX pays transaction fees, is locked ("stacked") to support consensus, and is posted alongside BTC in Bitcoin staking bonds.
Core technology and architecture
Stacks runs as a separate chain that uses the Clarity smart contract language, which is not EVM-compatible. Every Stacks block is anchored to Bitcoin. The Nakamoto upgrade, activated in October 2024, cut block times from about 10 minutes to about 5 seconds and introduced 100% Bitcoin finality.
Stacks also includes sBTC, a Bitcoin peg implemented as a SIP-010 fungible token. Its supply was 2,949 BTC at the end of Q2 2026. Clarity 6 shipped with Epoch 4.0 on 14 October 2026.
Primary use cases and applications
Activity centres on DeFi and Bitcoin-based finance (BTCFi). Zest Protocol passed $122M in deposits and $42M in borrows, and Stacking DAO's TVL passed $85M in Q3 2026. sBTC TVL stood at $437M at the close of Q1 2026.
Cumulative wallets reached 1,601,594 in Q2 2026, up 8.0% quarter over quarter. Daily active users rose about 55%, from roughly 2,700 in Q1 to about 4,200 in Q2. The sources reviewed did not provide NFT-specific data for 2026.
Consensus mechanism and network security model
Stacks uses Proof of Transfer (PoX). Miners spend BTC rather than electricity to produce blocks and are rewarded in STX, and the BTC they commit is distributed to stakers. PoX has operated since January 2021 and has distributed over 4,200 BTC to stakers.
Bitcoin Staking launched in September 2026. Stakers lock BTC on the Bitcoin base layer alongside STX to form a bond with a bonding period of about six months. Rewards arrive as sBTC by default, and stakers can elect a native BTC payout. Stacks states that the network is secured by 100% of Bitcoin's hashrate following the Nakamoto change.
Tokenomics
STX is trading at $0.3204, up 8.30% over 24 hours, and 91.70% below its all-time high of $3.86. Circulating supply is 1,879,362,693 STX and total supply is 1,879,395,371 STX, so nearly all tokens are already in circulation.
The Stacks Foundation describes an open-ended emission schedule with no fixed cap. The original schedule set block rewards at 1,000 STX per block with periodic halvings. SIP-029 deferred the first reduction and lowered the coinbase to 500 STX per block. SIP-045, activated on 30 July 2026, restored the coinbase to 1,000 STX per Bitcoin block and removed the step-down schedule. The Stacks site says block rewards add about 2% to supply yearly, while a June 2026 draft SIP appendix models higher inflation, so published estimates differ.
Kraken lists the initial 2018 distribution as Treasury 30.5%, Series A 15.9%, Founders 13.5%, ICO 13.3%, Investors 8.2%, and smaller allocations. This is a secondary source.
Who is behind Stacks and where is it based?
Muneeb Ali and Ryan Shea founded the project as Blockstack in 2013. Ali is publicly named as the founder, so the team is not anonymous. Blockstack was accepted into Y Combinator's 2014 batch.
The corporate structure has several entities:
- Hiro Systems PBC (formerly Blockstack PBC): a Delaware public benefit corporation with a New York address, which the SEC filings confirm.
- Stacks Open Internet Foundation (Stacks Foundation): a Delaware nonprofit formed in April 2020.
- Stacks Labs: the operating entity for product and development. Ali became its CEO effective 15 October 2026, succeeding interim CEO Alex Miller.
- Stacks Endowment: a Cayman Islands foundation company.
The team operates from the United States. The sources do not name a single headquarters for the ecosystem as a whole.
Key partnerships and ecosystem integrations
Fireblocks made Stacks available on 16 June 2026, and BitGo announced sBTC support on 28 August 2026. Circle launched USDCx on Stacks in early 2026. Hex Trust has supported Stacks since October 2024. STX became tradable on Bullish on 3 September 2026. Zest Protocol, Stacking DAO, BitFlow and Hermetica are the main DeFi applications, and Xverse and Leather are the primary sBTC wallets.
Competitive advantages and unique value proposition
Stacks adds smart contracts to Bitcoin without changing Bitcoin itself. Under Bitcoin Staking, BTC stays under the holder's keys until the bond ends. The network has about five years of PoX operating history. Electric Capital's developer survey ranked Stacks among the five fastest-growing developer ecosystems, a third-party claim reported in a news article.
Development activity and roadmap
PoX-5 activated on 30 July 2026, and SIP-039 raised DeFi capacity 30 times in March 2026. The Genesis Bond sold out at about 230 BTC in September 2026, and Bond 2 opened in October with 500 BTC capacity. On 7 October 2026, Muneeb Ali published the "Satoshi Upgrades" vision, which targets Stacks as a hub for Bitcoin capital markets by 2030. The stated scaling goal is 100x throughput through Clarity Wasm. Work on sBTC multichain support via Wormhole and a tier-1 stablecoin integration is in progress.