Blockstack is a new network for decentralized applications [8]. Blockstack aims to address the centralization at the application-layer of the internet. More specifically, Blockstack builds an alternate DNS and alternate public-key infrastructure. It's the first implementation of a decentralized DNS system on top of the Bitcoin blockchain.[2] It combines DNS functionality with public key infrastructure and is primarily meant to be used by new blockchain applications. Blockstack is being developed by a group of engineers and researchers coming from both industry and academia[9] and is released as open-source. Other systems like Namecoin have implemented decentralized DNS using blockchains earlier by using blockchains other than Bitcoin. Blockstack became operational on the Bitcoin blockchain in September 2015.[4] As of March 2016, Blockstack was the largest non-financial system using the Bitcoin blockchain by transaction volume.

Founded in 2013 as Onename, Blockstack raised $5.45 million venture capital from a number of major players, including Union Square Ventures, AngelList founder Naval Ravikant, and Digital Currency Group.[10]

In May 2017, at CoinDesk's "Consensus 2017" blockchain conference in New York, Blockstack released a decentralized browser add-on,[11] described as "a kind of Netscape for the decentralized internet, running apps on a plethora of blockchains".[12] The purpose of this add-on is to allow developers to use Blockstack's tools (decentralized identity, storage, and payments) to "create consumer-facing apps". The add-on works with any browser, including Chrome, Safari, and Firefox.[11]

See also