People compare Bitcoin to the Internet. Well, the Internet required an enormous hardware infrastructure buildout before its potential as a software platform could be realized. That's where 21 comes in. We believe that Bitcoin isn't going to happen simply by dropping a line of Javascript into a webpage. Someone needs to build the full-stack infrastructure for Bitcoin, from silicon to software. Backed by Andreessen Horowitz and Peter Thiel, that someone is us.

Company Growth (employees)
San Francisco, US
Size (employees)
142 (est)-2%
21 was founded in 2013 and is headquartered in San Francisco, US

21 Office Locations

21 has office in San Francisco
San Francisco, US

21 Metrics

21 Summary

Founding Date


Total Funding

$121.1 m

Latest funding size

$116 m

Time since last funding

about 2 years


We estimate that 21's latest funding round in March 2015 was $116 m. In total, 21 has raised $121.1 m

21 Online Presence

21 News

21 Company Life

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