Stacks, formerly Blockstack, is a layer-2 blockchain that extends the use of Bitcoin to include smart contracts, decentralized finance ("DeFi"), non-fungible tokens (NFTs), and decentralized apps ("DApps"), while still maintaining Bitcoin finality [1] . Stacks, like the Lightning Network, Merlin Chain, Rootstock Infrastructure Framework (RIF) and Dovi, is aimed at improving the functionality of Bitcoin. [2]
The Blockstack project was originally founded by Muneeb Ali and Ryan Shea in 2013 at the Princeton Computer Science department. The two co-founders took their new start-up through the Y Combinator accelerator program in 2014 and raised $1.33 million [3] in seed investment from Union Square Ventures (known for investing in Twitter, Stripe, Coinbase and more as start-ups), alongside Naval Ravikant and SV Angel [1] . By 2017, Blockstack locked in two additional funding rounds totalling $4 million. In 2017, Blockstack went on to launch an initial coin offering (ICO) which raised close to $53 million [3] . BlockStack PBC (now called Hiro PBC) was the first to launch a SEC qualified token offering in July 2019. The start-up spent almost a year to ensure they met the SEC qualifications [4] and consequently raised another $15.5 million in capital from the token offering. [5]
In October 2020 the community rebranded the Blockstack network and application ecosystem to the Stacks ecosystem and the Blockstack PBC company rebranded to Hiro PBC. After the rebrand, Hiro PBC changed its aim from guiding the Stacks blockchain to focusing on developing tools for the Stacks network [1] .
With the introduction of the Stacks Blockchain 2.0 on 14 January 2021, Hiro PBC revoked their sole control of the network [6] . Due to this, the Stacks token could no longer be viewed as a security under SEC Regulation A+ qualifications and filed an exit report. [7] [6]
At its inception, Blockstack aimed to offer solutions to the problems of internet privacy, security and data breaches (especially in cloud storage) [8] [1] . It did so through offering a decentralized internet platform where users could completely own and control their personal information through a network of compatible browsers [6] . With Blockstack, users have choice on what data they share with other users and applications [9] [10] [11] and no longer have to upload data to an external site [6] . By using the decentralized security Bitcoin offers, an user would receive digital private keys to create their internet identity on the Blockstack network. [6]
After rebranding Blockstack to Stacks and releasing the Stacks Blockchain 2.0, Hiro PBC moved their focus to securing Stacks transactions on Bitcoin, build experiences for the community, offering smart contracts on Bitcoin built on the Clarity programming language and offering developer tools to grow the functionality of Bitcoin and other chains through dApps [12] [13] .
The potential of decentralized finance with Bitcoin security has brought attention to Stacks. Companies like Velar and AlexLab offer Decentralized Exchanges (DEX) among other products that allows trading of SIP-10 tokens and stablecoins. Zest Protocol is another example of a company using Stacks to offer borrowing and lending services. The Nakamoto upgrade has brought more secured and faster transactions to Stacks.
In 2021, the CityCoins project launched fungible tokens for the cities of Miami and New York City. [14] [15] In September 2021, Miami's city commissioners voted to accept the protocol treasury,[ needs context ] valued at $21 million at the time. [16] MiamiCoin's value crashed, and so Stacks donated $5.25M to the City of Miami. [17]
As of March 2023, Bloomberg was reporting that CityCoin was facing a "quiet demise" as liquidity issues and a lack of interest caused both the New York City and Miami coins to be delisted from the OkCoin cryptocurrency exchange. [18]
A cryptocurrency, crypto-currency, or crypto is a digital currency designed to work through a computer network that is not reliant on any central authority, such as a government or bank, to uphold or maintain it.
Ripple is a real-time gross settlement system, currency exchange and remittance network that is open to financial institutions worldwide and was created by Ripple Labs Inc., a US-based technology company. Released in 2012, Ripple is built upon a distributed open source protocol, and supports tokens representing fiat currency, cryptocurrency, commodities, or other units of value such as frequent flier miles or mobile minutes. Ripple purports to enable "secure, instantly and nearly free global financial transactions of any size with no chargebacks". The ledger employs the native cryptocurrency known as XRP.
Coinbase Global, Inc., branded Coinbase, is an American publicly traded company that operates a cryptocurrency exchange platform. Coinbase is a distributed company; all employees operate via remote work. It is the largest cryptocurrency exchange in the United States in terms of trading volume. The company was founded in 2012 by Brian Armstrong and Fred Ehrsam. In May 2020, Coinbase announced it would shut its San Francisco, California, headquarters and change operations to remote-first, part of a wave of several major tech companies closing headquarters in San Francisco in the wake of the COVID-19 pandemic.
Ethereum is a decentralized blockchain with smart contract functionality. Ether is the native cryptocurrency of the platform. Among cryptocurrencies, ether is second only to bitcoin in market capitalization. It is open-source software.
A decentralized autonomous organization (DAO), sometimes called a decentralized autonomous corporation (DAC), is an organization managed in whole or in part by decentralized computer program, with voting and finances handled through a blockchain. In general terms, DAOs are member-owned communities without centralized leadership. The precise legal status of this type of business organization is unclear.
Counterparty is a peer-to-peer financial platform and a distributed, open source protocol built on top of the Bitcoin blockchain and network. It was one of the most well-known "Bitcoin 2.0" platforms in 2014, along with Mastercoin, Ethereum, Colored Coins, Ripple and BitShares.
Kraken is a United States–based cryptocurrency exchange, founded in 2011. It was one of the first bitcoin exchanges to be listed on Bloomberg Terminal and was valued at US$3 billion in January 2024. The company has been the subject of several regulatory investigations since 2018, and has agreed to cumulative fines of over $30 million.
Consensys is a private blockchain software technology company founded by Joseph Lubin and based in Fort Worth.
A decentralised application is an application that can operate autonomously, typically through the use of smart contracts, that run on a decentralized computing, blockchain or other distributed ledger system. Like traditional applications, DApps provide some function or utility to its users. However, unlike traditional applications, DApps operate without human intervention and are not owned by any one entity, rather DApps distribute tokens that represent ownership. These tokens are distributed according to a programmed algorithm to the users of the system, diluting ownership and control of the DApp. Without any one entity controlling the system, the application is therefore decentralised.
Cardano is a public blockchain platform. It is open-source and decentralized, with consensus achieved using proof of stake. It can facilitate peer-to-peer transactions with its internal cryptocurrency, ADA.
A cryptocurrency wallet is a device, physical medium, program or an online service which stores the public and/or private keys for cryptocurrency transactions. In addition to this basic function of storing the keys, a cryptocurrency wallet more often offers the functionality of encrypting and/or signing information. Signing can for example result in executing a smart contract, a cryptocurrency transaction, identification, or legally signing a 'document'.
Polkadot is a decentralized, nominated proof-of-stake blockchain with smart contract functionality. The cryptocurrency native to the blockchain is the DOT.
Cryptocurrency and crime describe notable examples of cybercrime related to theft of cryptocurrencies and some methods or security vulnerabilities commonly exploited. Cryptojacking is a form of cybercrime specific to cryptocurrencies used on websites to hijack a victim's resources and use them for hashing and mining cryptocurrency.
Justin Sun is a Chinese-born cryptocurrency entrepreneur and business executive. He is the founder of TRON, a cryptocurrency with an associated blockchain DAO ecosystem and USDD, a stablecoin issued by TRON DAO Reserve. Sun is also the owner of Rainberry, which developed the BitTorrent protocol and under Sun's leadership developed the BTT cryptocurrency token. Sun also owns the crypto exchange Poloniex, and is affiliated with the crypto exchange HTX. Sun served as Permanent Representative of Grenada to the World Trade Organization (WTO) in Geneva from 2021 to 2023.
Tron is a decentralized, proof-of-stake blockchain with smart contract functionality. The cryptocurrency native to the blockchain is known as Tronix (TRX). It was founded in March 2014 by Justin Sun and since 2017 has been overseen and supervised by the TRON Foundation, a non-profit organization in Singapore, established in the same year. It is open-source software.
Decentralized finance provides financial instruments and services through smart contracts on a programmable, permissionless blockchain. This approach reduces the need for intermediaries such as brokerages, exchanges, or banks. DeFi platforms enable users to lend or borrow funds, speculate on asset price movements using derivatives, trade cryptocurrencies, insure against risks, and earn interest in savings-like accounts. The DeFi ecosystem is built on a layered architecture and highly composable building blocks. While some applications offer high interest rates, they carry high risks. Coding errors and hacks are a common challenge in DeFi.
MetaMask is a software cryptocurrency wallet used to interact with the Ethereum blockchain. It allows users to access their Ethereum wallet through a browser extension or mobile app, which can then be used to interact with decentralized applications. MetaMask is developed by Consensys, a blockchain software company focusing on Ethereum-based tools and infrastructure.
0x is an open-source, decentralized exchange infrastructure that enables the exchange of tokenized assets on multiple blockchains. Developers can use 0x to incorporate exchange functionality into their applications, and market makers can use 0x to create markets for cryptocurrencies and tokens. ZRX, an Ethereum ERC-20 token, is the native governance and staking token of 0x. Individuals who own ZRX can vote on protocol changes and stake their tokens to earn liquidity rewards in Ether (ETH). The project's creator and core developer is 0x Labs.
Solana is a blockchain platform which uses a proof-of-stake mechanism to provide smart contract functionality. Its native cryptocurrency is SOL.
ICON is a decentralized, open-source blockchain with smart contract functionality. ICX is the native cryptocurrency of the platform.