Blockstream is a pioneering Bitcoin infrastructure company founded in 2014 by Adam Back, a cryptographer cited in the Bitcoin whitepaper. The company has established itself as one of the most influential entities in the Bitcoin ecosystem, contributing significantly across multiple verticals.

On the infrastructure side, Blockstream operates the Liquid Network, a Bitcoin sidechain enabling faster settlements and confidential transactions—a meaningful contribution to Bitcoin-based DeFi, though adoption remains niche compared to Ethereum-based alternatives. Their Satellite network, which broadcasts Bitcoin blockchain data globally via satellite, demonstrates genuine commitment to decentralization and censorship resistance.

For developers, Blockstream offers robust tools including the Elements platform for sidechain development, c-lightning implementation, and Blockstream Green SDK. Their open-source contributions to Bitcoin Core development are substantial and well-regarded.

The Jade hardware wallet provides a competitively priced, open-source cold storage solution, though it faces stiff competition from Ledger and Trezor in terms of multi-chain support.

Key concerns include heavy Bitcoin maximalist focus limiting broader ecosystem integration, and the company's reliance on continued venture funding. Overall, Blockstream remains a cornerstone of Bitcoin development with strong technical credibility.