moomoo is a zero-commission broker for stock and ETF trades, and offers low $0.65 per contract options trades as well. For futures trading on margin, rates are a bit on the higher side, charging 6.8% p.a. For U.S. and Hong Kong markets, and 8.8% p.a. for China A-shares.
There are other various fees for deposits, withdrawals, and other services, but there are currently no platform fees for U.S. users.