Coinbase and Gemini, two leading cryptocurrency exchanges, offer robust security and regulatory compliance but differ in fees, coin offerings, and user experience. Coinbase generally has higher base fees, charging up to 0.60% for takers and 0.40% for makers on small trades, while Gemini's active trader model starts at 0.40% for takers and 0.20% for makers. For larger volumes, both exchanges offer competitive rates, with Coinbase's lowest taker fee at 0.05% and Gemini's at 0.04%. In terms of cryptocurrency support, Coinbase lists over 250–300 coins, including many altcoins and DeFi tokens, whereas Gemini offers around 80–100, focusing on well-known assets. Both platforms are user-friendly, with Coinbase noted for its intuitive interface and educational resources, and Gemini providing a clean default view with advanced options for experienced users. Security measures include offline cold storage and 2FA, with Coinbase being a publicly traded company and Gemini regulated by the NYDFS. Customer support is available on both platforms, with Coinbase offering 24/7 service. Coinbase is ideal for users seeking a wide range of coins and ease of use, while Gemini suits those prioritizing security and compliance.