Charles Schwab founded Charles Schwab & Co. in 1971 as a traditional brokerage firm in San Francisco. In 1974, it transitioned to a discount brokerage model where customers paid lower commissions. Schwab has since grown to become one of the largest discount brokerages in the US, serving almost 10 million accounts. It offers low-cost trading and financial education resources to help customers learn to invest. Schwab pioneered many innovations including 24-hour phone service in 1982 and allowing online trading in 1996.