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Composer vs Langbot

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Composer compared with Langbot
DetailComposer logo ComposerLangbot logo Langbot
What it doesAutomated trading platform for building, backtesting, and executing AI-powered trading strategies without coding Data and simulation layer for prediction markets on Kalshi and Polymarket
StageEstablished Not given
Founded2020 Not given
Based inUS Not given
Pricing modelNot given Freemium
PricingStarter: Free (no subscription). Advanced: $10/month. Pro: $32/month (billed monthly) or $384/year (billed yearly). Business: Custom pricing (book a call). Additional FINRA and SEC regulatory fees apply on sales of securities. Free ($0/month) with 60-second delay on live data, 60 API requests/minute, 1 concurrent stream, 5 subscriptions, 20 sim runs/month; Builder ($49/month) with 10-second delay, 600 requests/minute, 5 streams, 25 subscriptions, 100 sim runs/month; Standard ($199/month) with 2-second delay, 3,000 request
Key features
  • AI-powered strategy creation in natural language
  • No-code visual editor for strategy customization
  • Automatic trading execution and rebalancing
  • Strategy backtesting with benchmark comparison
  • Community strategy sharing and investment
  • Support for traditional and Roth IRAs
  • Full API access on Pro plan
  • Historical allocation graph visualization
  • Asset transfer from other brokerages
  • Order-book history with outcomes and rules for every market on Kalshi and Polymarket
  • Live context synchronized on one clock: speech, official text and data releases
  • Simulator with venue's real fees and timing for backtesting
  • Full REST, WebSocket and SSE access with signed webhooks
  • Python and TypeScript SDKs and CLI for programmatic access
  • MCP server with phrase and market subscription tools
  • Fair-value and live probability models for markets
  • Signed receipts and provenance reports for evidence
  • Paper trading mode on live record before switching to real exchange keys
  • Timestamped facts for resolved market outcomes with speaker attribution
What makes it different
  • No coding required to build automated trading strategies
  • Zero commissions and zero management fees on base plan
  • Combines strategy creation, backtesting, and execution in one platform
  • AI-assisted strategy creation accessible to non-experts
  • SEC-registered investment advisor with brokerage services
  • Synchronized context on the same clock: order books, market rules, and every speech or data release that moves prices
  • Speaker attribution and verdict for each phrase: whether it counts under market rules
  • Live recording of order books for every open market rolling out
  • No trading signals: users control all decisions and trades with their own exchange keys
Community votes00
DR (Domain Rating by Ahrefs)58 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)130
Citation Flow (Majestic)340
Referring domains (Majestic)12550

4 details filled in for both companies.

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