• Hyperledger (or the Hyperledger project) is an umbrella project of open source blockchains and related tools
started in December 2015 by the Linux Foundation, to support the collaborative development of blockchain-based
• In December 2015, the Linux Foundation announced the creation of the Hyperledger Project. The founding members
of the project were announced in February 2016 and ten further members and the makeup of the governing board
were announced March 29. On May 19, Brian Behlendorf was appointed executive director of the project.
• The objective of the project is to advance cross-industry collaboration by developing blockchains and
distributed ledgers, with a particular focus on improving the performance and reliability of these systems (as
compared to comparable cryptocurrency designs) so that they are capable of supporting global business
transactions by major technological, financial and supply chain companies.
• In early 2016, the project began accepting proposals for incubation of codebases and other technologies as core
elements. One of the first proposals was for a codebase combining previous work by Digital Asset, Blockstream’s
libconsensus and IBM’s OpenBlockchain. This was later named Fabric. In May, Intel’s distributed ledger named
Sawtooth, was incubated.
• The governing board of the Hyperledger Project consists of twenty members chaired by Blythe Masters, (CEO of
Digital Asset), and a twelve-member Technical Steering Committee chaired by Christopher Ferris, CTO of Open
Technology at IBM.
Hyperledger blockchain platforms:
• Hyperledger Burrow: Burrow is a blockchain client including a built-to-specification Ethereum Virtual Machine.
Contributed by Monax and sponsored by Monax and Intel.
• Hyperledger Fabric: Contributed by IBM.
• Hyperledger Iroha: Based on Hyperledger Fabric, with a focus on mobile applications. Contributed by Soramitsu.
• Hyperledger Sawtooth: Contributed by Intel, Sawtooth utilises a novel consensus mechanism known as “Proof of
Elapsed Time,” a lottery-design consensus protocol that builds on trusted execution environments provided by
Intel’s Software Guard Extensions (SGX). An effort is underway to mount the Hyperledger Burrow EVM application
engine as a Sawtooth transaction processor.
Hyperledger developer tooling:
• Hyperledger Cello: Blockchain deployment tooling contributed by IBM. Baohua Yang and Haitao Yue from IBM
Research are committed part-time to developing and maintaining the project. Cosponsored by Soramitsu, Huawei
• Hyperledger Composer: Blockchain package management tooling contributed by IBM.
• Hyperledger Explorer: Blockchain analytics tooling contributed by IBM, Intel, and DTCC
• Hyperledger Indy: Contributed by the Sovrin Foundation.