Composer
No-code platform to build, backtest and automate trading strategies with AI
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Pricing
Free · from $10/mo
API
Yes
Company
Composer
Founded
2020
Platforms
What is Composer?
Composer is a no-code trading platform for building, backtesting and automating investment strategies, which it calls "symphonies." You describe a goal in plain language and the AI-assisted editor drafts a strategy. You can then change it in a visual editor by swapping assets, adding if/then conditions, applying sort and filter logic, or picking a weighting method such as equal, inverse volatility or market cap.
Backtests compare a strategy against benchmarks or other strategies and account for fees and slippage. Once a strategy is live, Composer places the trades and rebalances it automatically. There is a library of pre-built strategies, and community members publish and remix each other's work. Traditional and Roth IRA accounts are supported.
Composer suits self-directed retail investors who want rules-based trading without writing code. A Business plan covers firms that need larger strategies and API access.
Key features
- AI strategy creation from natural-language prompts
- Visual no-code strategy editor with conditional logic
- Backtesting against benchmarks, including fees and slippage
- Automated trade execution and rebalancing
- Pre-built strategy library
- Community publishing and remixing of strategies
- Traditional and Roth IRA support
- API for data, backtests and trading (Pro)
Use cases
Who it's for
Automating a rules-based portfolio
Investors set rebalancing logic once, and Composer runs the trades on their behalf.
Testing trading ideas
Users describe an idea to the AI and backtest it against benchmarks before putting money in.
Retirement investing
Users can run automated strategies inside Traditional or Roth IRA accounts.
Programmatic trading
Pro users can use the API for data, backtests and trading.
Composer pricing
From the vendor's site, checked Nov 2, 2026; we re-check prices monthly. Prices change — confirm on their pricing page.
Starter
month
$0
- Automate 1 strategy
- Strategies up to 200 nodes
- Trade with AI
- Unlimited building and backtesting
Advanced
month
$10/mo
- Automate up to 5 strategies
- Strategies up to 350 nodes
- More Trade with AI usage
Pro
month
$32/mo billed yearly ($384/year)
- Automate up to 500 strategies
- Strategies up to 10,000 nodes
- Full API access
- Manual trade overrides
- Priority support
Business
custom
Custom
- Strategies up to 15,000 nodes
- Mark-to-market accounting
- Full IP ownership
- API access
Price history
- Nov 2, 2026Business: Custom (book a call) → Custom
How Composer compares
- Composer has a free plan, like 2 of the 4 alternatives below.
- It offers an API, which none of the others do.
| Tool | Starts at | Free plan | Free trial | API | Open source | |
|---|---|---|---|---|---|---|
| C | $10/mo | — | — | |||
| T | — | — | — | — | Composer vs TrendSpider | |
T TradingView | — | — | — | Composer vs TradingView | ||
S Seeking Alpha | — | — | — | — | Composer vs Seeking Alpha | |
A AlphaSense | Quote | — | — | — | — | Composer vs AlphaSense |
The closest alternatives in our directory by category. “Starts at” is the cheapest paid plan per month, as each vendor lists it.
Pros and cons
Strengths
- Free Starter plan includes unlimited building and backtesting
- No commissions or management fees advertised
- Pro plan includes API access
- IRA accounts supported
Limitations
- Free plan automates only one strategy
- API access requires the Pro or Business plan
- Regulatory fees from FINRA and the SEC still apply
- Business pricing requires a sales call
Composer FAQ
Is Composer free?
Yes. The Starter plan costs $0. It lets you automate one strategy and build and backtest unlimited strategies.
How much do paid plans cost?
Advanced costs $10/month. Pro costs $32/month, billed yearly at $384. Business pricing is custom.
Does Composer have an API?
Yes. Pro includes full API access for data, backtests and trading, and Business plans also include API access.
Are there commissions?
Composer advertises zero commissions and zero management fees. Regulatory and other fees may apply under its fee schedule.
Does it support retirement accounts?
Yes. It supports Traditional and Roth IRA accounts.
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Composer
Free · from $10/mo
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