Coinbase - Bitcoin, safe and easy.
Zenbot - Before using trading bots, you need to understand that they are NOT a surefire profit machine. You may want to watch this video.
Binance - Cryptocurrencies exchange platform
Freqtrade - Freqtrade is a cryptocurrency trading bot that is developed in Python and supported many exchange marketplaces like Binance, Bittrex, FTX, Kraken, and others.
Poloniex - US-based cryptocurrency exchange with maximum security
Superalgos - Superalgos is one of the smart cryptocurrencies trading bots that integrates all crucial aspects of crypto trading automatization in a visual scripting environment easily accessible to non-technical users and optimized for developers.