Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Coinbase - Bitcoin, safe and easy.
BlockCypher - AWS for Block Chains
Binance - Cryptocurrencies exchange platform
Kaleido Blockchain Business Cloud - Create and manage enterprise private blockchain networks within minutes using Kaleido's platform. Our full-stack enterprise blockchain as a service and cloud integrations support your entire blockchain journey, from PoC to live production.
Poloniex - US-based cryptocurrency exchange with maximum security