Composer
No-code AI-assisted strategy builder that automates rules-based investing.
Acquired — still operating
acquired by SoFi; relaunched as Composer by SoFi 2026
About
Composer lets you describe an investment idea in plain language and turns it into a rules-based strategy (a "symphony") that it backtests and then executes automatically, rebalancing on schedule.
It ships a library of over 2,000 community-built strategies, supports IRAs, and charges a flat Trading Pass subscription instead of commissions. SoFi acquired Composer and relaunched it as "Composer by SoFi" in 2026. It is U.S.-only, executes once daily rather than intraday, and backtests deserve skepticism — especially with leveraged ETFs.
What it can do
- Natural-language strategy builder
- No-code visual strategy editor
- Backtesting against historical data
- Automated execution and rebalancing
- Community strategy library
- IRA and retirement account support
Setup
- Sign up and open a Composer brokerage account.
- Describe a strategy in plain language or pick a community symphony.
- Review the backtest and tweak weights and conditions.
- Start the Trading Pass trial for automated execution.
- Fund the account and let it rebalance on schedule.
Prerequisites
U.S. residency; a Composer brokerage account; Trading Pass for automation.
Use cases
Works with
Trust score — 6/10
Scored 6/10 (metrics tier, metrics-v1). Evidence: Acquired by SoFi and relaunched as 'Composer by SoFi' in June 2026 — roadmap now tied to SoFi; Executes once daily; unsuitable for intraday strategies; Backtests can flatter leveraged-ETF strategies; U.S.-only. License: Proprietary; free build/backtest tier, Trading Pass $32/mo billed annually..
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 6.0/10
- Maintenance · recency, releases, issue load
- 6.0/10
- Openness · license + docs
- 4.0/10
- Manual review · sanity read + red-flag check
- 6.0/10
- · Acquired by SoFi and relaunched as 'Composer by SoFi' in June 2026 — roadmap now tied to SoFi
- · Executes once daily; unsuitable for intraday strategies
- · Backtests can flatter leveraged-ETF strategies; U.S.-only
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.