Composer

Composer is an AI-native automated trading platform founded in 2020 that lets retail investors build, backtest, and execute algorithmic trading strategies without writing a single line of code. Strategies on the platform — called "symphonies" — can be built from scratch using a visual no-code editor, generated in plain English via an AI assistant, or selected from a community library of over 3,000 user-created algorithms. The platform is operated through Composer Securities LLC, a broker-dealer registered with the SEC and a member of FINRA/SIPC. Accounts are cleared through Alpaca Securities LLC and Apex Clearing Corporation.

The platform targets a specific investor: someone who wants more control than a robo-advisor offers but doesn't want to learn Python to build their own quant strategy. Composer has reported over $200 million in daily trading volume and supports individual taxable accounts, Roth IRAs, Traditional IRAs, and rollover IRAs, as well as a business account tier with API access. The minimum to start trading is $50, though Composer effectively requires a subscription (the "Trading Pass") to unlock automated execution — making the real question not whether you can afford the entry but whether your portfolio is large enough to justify the fixed cost.