Advancing the Art of Blockchain Technology

Sidechains are extensions to existing blockchains, enhancing their privacy and functionality by adding features like smart contracts and confidential transactions.

Lightning Networks

Blockstream is collaborating with industry leaders to create a Bitcoin micropayment system that supports high volumes of instant tiny payments using proportional transaction fees and that operates at the speed of light. We are now developing Bitcoin Lightning prototypes and creating consensus on interoperability. Our c-lightning implementation is the go-to code and specification for enterprise Lightning Network deployments on Bitcoin, and is what powers our easy-to-use Lightning Charge HTTP Rest API.

Plug into Lightning Charge Browse GitHub Repo


Liquid is the world's first federated sidechain that enables rapid, confidential, and secure bitcoin transfers. Participating exchanges and Bitcoin businesses deploy the software and hardware that make up the Liquid network, so that they can peg in and out of the Bitcoin blockchain and offer Liquid’s features to their traders. Liquid provides a more secure and efficient system for exchange-side bitcoin to move across the network.

Learn more about Liquid

Cryptocurrency Data Feed

The Cryptocurrency Data Feed, a partnership between Blockstream and Intercontinental Exchange (ICE), offers traders best in class real-time and historical cryptocurrency data from a strong and growing list of exchange partners worldwide. With over 25 exchanges, 133 crypto and fiat currency pairs, and over 200M order book updates every day, the Cryptocurrency Data Feed is the most comprehensive and robust source of global cryptocurrency data.

The Cryptocurrency Data Feed

Blockstream Satellite

The Blockstream Satellite network broadcasts the Bitcoin blockchain to the entire planet. The satellite network provides an opportunity for nearly 4 billion people without Internet access to utilize bitcoin while simultaneously ensuring bitcoin use is not interrupted due to network interruption. Utilizing the latest open source Software Defined Radio (SDR) technologies, the Blockstream Satellite network offers a breakthrough in the cost effectiveness of satellite communications.

Learn more about Blockstream Satellite

The Elements Project

Blockstream believes that to be secure, blockchain systems must be built with open source technology. Towards that goal, we've created the Elements Project, a community of people extending and improving the Bitcoin codebase. As open source, protocol-level technology, developers can use Elements to extend the functionality of Bitcoin and explore new applications of the blockchain. Join the expanding group of individual and corporate developers using Elements to build robust, advanced, and innovative blockchains.

Join the Elements Slack! Browse GitHub Repo

Select Publications and Talks

Mimblewimble and Scriptless Scripts
Andrew Poelstra, Real World Crypto, January 11, 2018
Simplicity: A New Language for Blockchains
Russell O’Connor, December, 13, 2017
Bulletproofs: Efficient Range Proofs for Confidential Transactions
Benedikt Bunz, Jonathan Bootle, Dan Boneh, Andrew Poelstra, Pieter Wuille, and Greg Maxwell, November 2017
Using the Chain For What Chains Are Good For
Andrew Poelstra, Scaling Bitcoin, November 5, 2017
Scalable Funding of Bitcoin Micropayment Channel Networks
Conrad Burchert, Christian Decker, and Roger Wattenhofer, November 2017
The Consensus Path to a Bitcoin Hard Fork: Parts 1-3
Rusty Russell, August 22, 2017
Confidential Assets
Andrew Poelstra, Adam Back, Mark Friedenbach, Gregory Maxwell, and Pieter Wuille, Workshop on Bitcoin and Blockchain Research, April 2017
Base32 Address Format for Native v0-16 Witness Outputs
Pieter Wuille, Greg Maxwell, March 20, 2017
Strong Federations: An Interoperable Blockchain Solution to Centralized Third Party Risks
Johnny Dilley, Andrew Poelstra, Jonathan Wilkins, Marta Piekarska, Ben Gorlick, and Mark Friedenbach, January 6, 2017
Mimblewimble: Private, Massively-Prunable Blockchains
Andrew Poelstra, Scaling Bitcoin Milan, October 2016
Segwit in Bitcoin: Lessons Learned
Gregory Sanders, Scaling Bitcoin Milan, October 2016
Schnorr Signatures for Bitcoin
Pieter Wuille, Scaling Bitcoin Milan, October 2016
Fast(er) Difficulty Adjustment for Secure Sidechains
Mark Friedenbach and Anonymous Contributor, Scaling Bitcoin Milan, October 2016
Andrew Poelstra, October 2016
The First Successful Zero-Knowledge Contingent Payment
Gregory Maxwell, February 2016
Segregated Witness and its Impact on Scalability
Pieter Wuille, Scaling Bitcoin, December 2015
Reaching The Ground With Lightning
Rusty Russell, Scaling Bitcoin, December 2015
Validation-Cost Metric
Jonas Nick, Scaling Bitcoin, December 2015
A Flexible Limit: Trading Subsidy for Larger Blocks
Mark Friedenbach, Scaling Bitcoin, December 2015
Tree Signatures: Multisig on Steroids Using Tree Signatures
Pieter Wuille, August 2015
Initial Block Synchronization is Quadratic Time Complexity
Patrick Strateman, Scaling Bitcoin, August 2015
Confidential Transactions
Gregory Maxwell, June 2015
Borromean Ring Signatures
Greg Maxwell and Andrew Poelstra, June 2, 2015
ASICs and Decentralization FAQ
Andrew Poelstra, April 8, 2015
On Stake and Consensus
Andrew Poelstra, March 22, 2015
Enabling Blockchain Innovations with Pegged Sidechains
Adam Back, Matt Corallo, Luke Dashjr, Mark Friedenbach, Gregory Maxwell,, Andrew Miller, Andrew Poelstra, Jorge Timón, Pieter Wuille, October 2014
Ring Signature Key Blinding
Gregory Maxwell and Andrew Poelstra, September 2014
Output Distribution Obfuscation
Gregory Maxwell and Andrew Poelstra, July 2014
Really Really Ultimate Blockchain Compression: CoinWitness
Gregory Maxwell, Bitcoin Talk, August 19, 2013
CoinSwap: Transaction Graph Disjoint Trustless Trading
Gregory Maxwell, Bitcoin Talk, October 30, 2013