Fidelity is the most used and fast-growing stock trading platform that provides commission-free stock trading, options trading, and exchange-traded funds (ETF). You can also open a brokerage account on Fidelity for free. Fidelity had 83.4 million user accounts in 2021 and the count has rapidly increased since then till date and it is growing still.
TD Ameritrade trading app platform offers low-cost funds and a better list of investment products like stocks, mutual funds, bonds, option contracts, forex futures, and exchange-traded funds (ETFs). TD Ameritrade has 11 million user accounts and it has been increasing since then.
Charles Schwab offers 3 platforms for online trading and its does charge any registration fees. It provides commission-free stock, extensive fund selections, options, and exchange-traded funds (ETFs). The total count of Charles Schwab’s domestic and international customer accounts comes down to 33.6 million and it is still increasing.
Ally Invest is a platform where no-minimum user accounts and trading in options, mutual funds, US-listed equities, and ETFs are provided. Ally Invest has over 250,000 customer accounts with $4.7 billion in assets and it has shown rapid growth.