Sonist vs Langbot

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

Sonist compared with Langbot
Detail	Sonist	Langbot
What it does	Trade the words as they're spoken.	Data and simulation layer for prediction markets on Kalshi and Polymarket
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Freemium
Pricing	Free: Browse markets and follow live prices. Plus: $29/month includes live transcription, keyword detection, automated prediction-market trading, panic-sell controls, 15-minute AFK sessions, and 1-on-1 support. Pro: $49/month includes everything in Plus plus rare keyword boosting, speaker diarizatio	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	Keyword detection and meters Speaker diarization Speaker-gated trading Risk checks and IOC order execution Immediate-or-cancel orders with protected fills Panic-sell controls Multiple concurrent live sessions AFK session timeouts	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	238ms execution from word detection to order submission Guaranteed profit when YES order fills below $1 before repricing Trades run on your own exchange account with encrypted API keys Local speaker engine gates trades to specified speakers only	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 votes	0	0
DR (Domain Rating by Ahrefs)	8 −1 (down) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	6	0
Citation Flow (Majestic)	19	0
Referring domains (Majestic)	15	0

4 details filled in for both companies.

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