Bram Cohen is an American computer programmer, best known as the author of the peer-to-peer (P2P) BitTorrent protocol in 2001, as well as the first file sharing program to use the protocol, also known as BitTorrent. He is also the co-founder of CodeCon and organizer of the San Francisco Bay Area P2P-hackers meeting, was the co-author of Codeville and creator of the Chia cryptocurrency which implements the proof of space-time consensus algorithm.
A cryptocurrency, crypto-currency, or crypto is a digital currency designed to work as a medium of exchange through a computer network that is not reliant on any central authority, such as a government or bank, to uphold or maintain it.
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.
Blockchain.com is a cryptocurrency financial services company. The company began as the first Bitcoin blockchain explorer in 2011 and later created a cryptocurrency wallet that accounted for 28% of bitcoin transactions between 2012 and 2020. It also operates a cryptocurrency exchange and provides institutional markets lending business and data, charts, and analytics.
Robinhood Markets, Inc. is an American financial services company headquartered in Menlo Park, California. It operates an electronic trading platform that facilitates commission-free trades of stocks, exchange-traded funds and cryptocurrencies as well as individual retirement accounts via a mobile app introduced in March 2015. Robinhood is a FINRA-regulated broker-dealer, registered with the U.S. Securities and Exchange Commission, and is a member of the Securities Investor Protection Corporation. The company's revenue comes from three main sources: interest earned on customers' cash balances, selling order information to high-frequency traders and margin lending. As of December 2023, Robinhood had 23.4 million funded accounts and 10.9 million monthly active users. In April 2022, Robinhood rolled out a cryptocurrency wallet to more than 2 million users.
BitGo, Inc. is a digital asset trust company and security company, headquartered in Palo Alto, California. It was founded in 2013 by Mike Belshe and Ben Davenport. Galaxy Digital announced its acquisition of BitGo in 2021 for $1.2 billion, although this acquisition was announced to have been canceled in 2022 after the crypto downturn, with BitGo continuing as an independent company.
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$10.8 billion in mid-2022. The company has been the subject of several regulatory investigations since 2018, and has agreed to cumulative fines of over $30 million.
Digital Currency Group (DCG) is a venture capital company focusing on the digital currency market. It is located in Stamford, Connecticut. The company has the subsidiaries Foundry, Genesis, Grayscale Investments, and Luno. It also formerly owned CoinDesk.
Proof of space (PoS) is a type of consensus algorithm achieved by demonstrating one's legitimate interest in a service by allocating a non-trivial amount of memory or disk space to solve a challenge presented by the service provider. The concept was formulated in 2013 by Dziembowski et al. and by Ateniese et al.. Proofs of space are very similar to proofs of work (PoW), except that instead of computation, storage is used to earn cryptocurrency. Proof-of-space is different from memory-hard functions in that the bottleneck is not in the number of memory access events, but in the amount of memory required.
An initial coin offering (ICO) or initial currency offering is a type of funding using cryptocurrencies. It is often a form of crowdfunding, although a private ICO which does not seek public investment is also possible. In an ICO, a quantity of cryptocurrency is sold in the form of "tokens" ("coins") to speculators or investors, in exchange for legal tender or other cryptocurrencies such as Bitcoin or Ether. The tokens are promoted as future functional units of currency if or when the ICO's funding goal is met and the project successfully launches.
Bitmain Technologies Ltd., is a privately owned company headquartered in Beijing, China, that designs application-specific integrated circuit (ASIC) chips for bitcoin mining.
Tether is a cryptocurrency stablecoin, launched by the company Tether Limited Inc. in 2014. As of January 2024, Tether's website lists fourteen protocols and blockchains on which Tether has been minted.
OKX is a global cryptocurrency spot and derivatives exchange and the second biggest crypto exchange by trading volume, serving over 50 million people globally. It was founded by Star Xu in 2017, who is also the CEO as of 2023. The President is Hong Fang and the CMO is Haider Rafique. OKX is owned by OK Group, which also owns the crypto exchange Okcoin.
Brian Armstrong is an American business executive, billionaire, and investor who is CEO of cryptocurrency platform Coinbase. He received media attention for his policy of keeping the workplace free of political activism.
Paxos Trust Company is a New York–based financial institution and technology company specializing in blockchain. The company's product offerings include a cryptocurrency brokerage service, asset tokenization services, and settlement services. ItBit, a bitcoin exchange run by Paxos, was the first bitcoin exchange to be licensed by the New York State Department of Financial Services, granting the company the ability to be the custodian and exchange for customers in the United States.
Celsius Network LLC is a cryptocurrency company. Headquartered in Hoboken, New Jersey, Celsius maintained offices in four countries and operated globally. Users could deposit a range of cryptocurrency digital assets, including Bitcoin and Ethereum, into a Celsius wallet to earn a percentage yield, and could take out loans by pledging their cryptocurrencies as security. As of May 2022, the company had lent out $8 billion to clients and had almost $12 billion in assets under management.
Chainalysis is an American blockchain analysis firm headquartered in New York City. The company was co-founded by Michael Gronager, Jan Moller and Jonathan Levin in 2014, and is the first start-up company dedicated to the business of Bitcoin tracing. It offers compliance and investigation software to analyze the blockchain public ledger, which is primarily used to track virtual currencies. Next to banks and brokers its customers have included the United States Federal Bureau of Investigation, Drug Enforcement Administration, and the Internal Revenue Service Criminal Investigation, as well as the United Kingdom's National Crime Agency.
Chia Network Inc. is a US-based blockchain technology company. The company built the Chia blockchain that uses proof of space and proof of time consensus protocols and issues the digital currency Chia (XCH). Chia Network was founded in 2017 by Bram Cohen, the creator of BitTorrent, and Ryan Singer. Its headquarters are in South San Francisco, California.
MoonPay is a multinational financial technology company involved in the transfer of cryptocurrency. Founded in 2019, the company is based in Miami and provides payment infrastructure for cryptocurrency and non-fungible tokens (NFTs) to be bought and sold with fiat currencies.
