Comparison
Prediction market tools compared
The main tools for Kalshi and Polymarket traders, what each one does, and how to pick. Descriptions come from each tool's own site and public coverage, checked October 2026. ArbTrader is our product, and it's listed with everything else.
The tools
| Tool | Type | Platforms | What it does | Places trades? |
|---|---|---|---|---|
| ArbTrader (this site) | Arbitrage scanner + execution | Kalshi, Polymarket, Polymarket US | Scans for fee-clearing spreads about every 15 seconds; one-tap orders on Kalshi and Polymarket US; whale tracker with copy trading; AI research from a screenshot; alerts and P&L. Free plan, $19.99 and $24.99 a month. | Yes (Quant plan) |
| Oddpool | Data and analytics | Kalshi, Polymarket | Side-by-side odds, arbitrage dashboard, whale trades, paper trading, API and historical order-book data. Free, $30 and $100 a month, institutional plans. | No, informational |
| Kairos | Trading terminal | Multiple sports markets | Multi-market trading terminal for sports prediction markets. | Not verified |
| Valence | Aggregator | Kalshi, Polymarket | Brings Kalshi and Polymarket markets together for trading. | Not verified |
| Stand.trade | Trading terminal | Prediction markets | Terminal-style interface for faster order entry and managing several positions. | Yes |
| ArbBets | Arbitrage | Several markets | Compares prices across markets to flag gaps. | Not stated |
| Hashdive | Analytics | Polymarket | Data-heavy market analytics. | Not stated |
| Polymarket Analytics | Analytics | Polymarket | Price trends, volume and liquidity data. | Not stated |
| Kalshinomics | Analytics | Kalshi | Market filters plus position and portfolio tracking. | Not stated |
| 0xInsider | Whale tracking | Prediction markets | Tracks large trades by big wallets. | Not stated |
| Rainmaker | AI research | Mostly sports | Model-based probability estimates. | Not stated |
| Flipr Bot | Bot | Prediction markets | Runs trades under rules you set. | Yes |
We haven't independently tested speed or accuracy for every tool. Features and prices change; check each tool's site. Spotted something out of date? Email [email protected].
How to choose
- Want to take arbitrage, not just see it? You need speed (seconds, not minutes), fees counted per platform, and a fast way to place both sides. A list of price differences without fees or sizes will show you gaps you can't actually profit from.
- Research and news? AI research tools and analytics dashboards help you form your own view on a single market.
- Following big traders? Whale trackers show large trades as they happen. Big traders lose too, and a large trade can be one half of a hedge.
- Building your own system? Data APIs with historical order books, like Oddpool's, are the place to start.
- In the US? Check that the tool supports Kalshi and Polymarket US, since the international Polymarket site isn't available to US users.
ArbTrader scans 30,000+ Kalshi, Polymarket and Polymarket US events about every 15 seconds and does this math for you.
Find my first winning trade