Pusher it's an easy and reliable platform with nice features based on websocket protocol: flexible pub/sub messaging, live user lists (presence), authentication...
Bitfinex is one of the world's largest and most advanced cryptocurrency trading platform. Users can exchange Bitcoin, Ethereum, Ripple, EOS, Bitcoin Cash, Iota, NEO, Litecoin, Ethereum Classic...
Blockchain WebSocket API allows developers to receive Real-Time notifications about new transactions and blocks.
SignalR is a library for ASP.NET developers that makes developing real-time web functionality using websockets as transport.
Bittrex is a US-based cryptocurrency exchange.
Binance is a blockchain ecosystem comprised of Exchange, Labs, Launchpad, and Info.
Bitstamp is a bitcoin exchange based in Luxembourg. It allows trading between USD currency and bitcoin cryptocurrency.
Huobi is an international multi-language cryptocurrency exchange.
CEX.IO is a cryptocurrency exchange and former Bitcoin cloud mining provider.
Bitmex is a cryptocurrency exchange and derivative trading platform.
ASP.NET Core SignalR is an open-source library that simplifies adding real-time web functionality to apps.
FXCM is a retail broker for trading on the foreign exchange market
Kraken WebSockets Public API offers real-time market data updates.
Discord API Gateway.
Telegram TDLib API
Coinbase Pro WebSocket and REST API