US-only, since it needs a social security number, so UK investors can't open an account.
Kenning's take
What it does
Composer lets investors build automated trading strategies, called symphonies, by describing goals in plain language or using a visual editor, then backtest them and let the app trade and rebalance automatically. It acts as the brokerage, with no commissions on trades. Composer joined SoFi in June 2026 and now trades as Composer by SoFi.
- AI-assisted strategy creation from plain-language prompts
- Backtesting before investing
- Automatic trading and rebalancing
- Community library of shared strategies
- Commission-free brokerage
Who it suits. US-based retail investors who want to automate rules-based trading without writing code.
Key facts
- Category
- Money, bills & shopping
- Made by
- Composer Technologies Inc. (part of SoFi since 2026)
- Based in
- United States
- How to get it
- Open an approved Composer brokerage account in the app or on the web; the application asks for a US social security number
- Works on
- Web, iOS
- In the UK
- No
- Free plan
- Starter plan, $0 a month, one strategy
Pricing
| Plan | Price | Billed |
|---|---|---|
| Starter | $0 | month |
| Advanced | $10 | month |
| Pro | $40 | month ($384 a year) |
Ratings
FAQ
Can I use Composer in the UK?
No sign of it. The app is not listed in the UK App Store and opening an account asks for a US social security number.
Is Composer free?
The Starter plan is free for one strategy. Advanced is $10 a month and Pro $40 a month, with no trade commissions.
Who owns Composer?
Composer joined SoFi in June 2026 and now trades as Composer by SoFi.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
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