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{{infobox company|name=21 Inc.|image=[[File:21.png]]
|founder=[[Matthew Pauker]], [[Balaji Srinivasan]]
|foundation=2013
|assets_btc={{increase}} 404,930
|assets_usd={{increase}} $116 million
|assets_year=2015
|website=[http://21.co/ 21.co]
|twitter=21dotco}}'''21''' (formerly '''21e6''') was a Bitcoin startup founded amidst the [[November 2013 bubble]]. In March 2015, they announced having raised $116 million in venture capital.<ref name="wsj">{{cite web|url=http://blogs.wsj.com/digits/2015/03/10/secretive-bitcoin-startup-21-reveals-record-funds-hints-at-mass-consumer-play/|title=Secretive Bitcoin Startup 21 Reveals Record Funds, Hints at Mass Consumer Play|author=Casey, Michael|work=Wall Street Journal|date=10 March 2015|accessdate=11 March 2015}}</ref>
In October 2017, 21.co has rebranded to [[Earn.com]].<ref name="earn">{{cite web|url=https://news.earn.com/21-co-is-now-earn-com-3e37e50c444f|title=21.co is now Earn.com|author=news.earn.com|date=31 October 2017}}</ref>
In April 2018, Earn.com was acquired by [[Coinbase (business)|Coinbase]].<ref name="coinbase">{{cite web|url=https://techcrunch.com/2018/04/16/coinbase-buys-earn-com-and-makes-ceo-balaji-srinivasan-its-first-cto/|title=Coinbase buys Earn.com and makes CEO Balaji Srinivasan its first CTO|author=Russell, Jon|date=16 April 2018}}</ref><ref name="vox">{{cite web|url=https://www.vox.com/2018/4/16/17242796/coinbase-acquisition-earn-balaji-srinivasan|title=Coinbase is buying Earn.com for about $100 million in a deal that is mostly about one key hire|author=Schleifer, Theodore|date=16 April 2018}}</ref>

==History==
===Early history and secrecy===
21 was founded in 2013 as 21e6, with the name being a reference to the [[controlled supply]] cap of the bitcoin economy.<ref name="wsj"/> In November, it was the subject of intense speculation after revealing $5 million in venture capital from a regulatory filing.<ref name="wsj"/> Co-founder [[Balaji Srinivasan]] stated that the startup's secrecy was "solely for pragmatic reasons – we didn’t have anything to say to the world,"<ref name="wsj"/> and they would not reveal their plans until May 2015.<ref name="wsj2"/>
===Venture capital===
By March 2015, 21 raised over $100 million in venture capital from numerous investors including Qualcomm Inc.,<ref name="wsj"/><ref name="twitter">[https://twitter.com/21dotco/status/600367120178745344 21.co investors tweet]</ref><ref name="wsj2">{{cite web|url=http://blogs.wsj.com/digits/2015/05/18/bitcoin-startup-21-unveils-product-plan-embeddable-mining-chips/|title=Bitcoin Startup 21 Unveils Product Plan: Embeddable Chips for Smartphones|date=18 May 2015|accessdate=21 July 2015|work=Wall Street Journal|author=Casey, Michael}}</ref> RRE Ventures,<ref name="wsj"/> Yuan Capital,<ref name="wsj"/> Cisco,<ref name="twitter"/><ref name="wsj2"/> Andreessen Horowitz,<ref name="wsj"/> Khosla Ventures,<ref name="wsj"/> Data Collective,<ref name="wsj"/> [[PayPal]] co-founders Peter Thiel<ref name="wsj"/> and Max Levchin,<ref name="wsj"/> eBay Inc. co-founder Jeff Skoll,<ref name="wsj"/><ref name="wsj2"/> Dropbox Inc. CEO Drew Houston,<ref name="wsj"/> Expedia Inc. CEO Dara Khosrowshahi,<ref name="wsj"/><ref name="wsj2"/> Zynga Inc. co-founder Mark Pincus,<ref name="wsj"/><ref name="wsj2"/> and former ARM Holdings PLC CSO Mark Templeton.<ref name="twitter"/><ref name="wsj2"/>
===Product===
Between 2013 and 2018 the company's main focus was on mining operations. In April 2018, co-founder [[Balaji Srinivasan]], who became the CEO of a company in May 2015, announced that the company gradually reduced its mining operations and focused on building a new software to handle micropayments: the paid email and tasks product.<ref name="product">{{cite web|url=https://medium.com/@balajis/the-turnaround-2d145589d814|title=The Turnaround|date=16 April 2018|author=Srinivasan, Balaji}}</ref>
==References==
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[[Category:Properties established in 2013]]