Blockstream is a blockchain technology company that provides various solutions for the development and deployment of blockchain-based applications. The company's platform offers features such as sidechains, smart contracts, and digital asset issuance. Blockstream was founded in 2014 and is headquartered in Toronto, Canada. The company has partnerships with various organizations in the blockchain and cryptocurrency space, including Fidelity Investments and Square. Blockstream has also developed the Liquid Network, a sidechain-based settlement network for cryptocurrency exchanges and other financial institutions.