Coinbase is described as 'A secure platform for buying, storing, and selling cryptocurrency including Bitcoin and Ethereum while offering a user-friendly interface suitable for all users' and is a popular cryptocurrency exchange in the bitcoin & cryptocurrency category. There are more than 100 alternatives to Coinbase for a variety of platforms, including Web-based, iPhone, Android, iPad and Windows apps. The best Coinbase alternative is Bisq, which is both free and Open Source. Other great apps like Coinbase are Exodus, Binance, Unstoppable Wallet and Kraken.
Bisq is FOSS software and decentralised. No corporate overlords!