Product thesis
Prediction markets are fragmented. Kalshi and Polymarket are separate platforms with separate interfaces, separate liquidity, and separate portfolios. If you trade on both, you are switching tabs, tracking positions in spreadsheets, and guessing at your total exposure. Siren fixes this by putting everything in one terminal.The problems
Fragmented markets. Kalshi and Polymarket cover overlapping events but you cannot compare them side by side. You end up checking multiple sites to find the best price. Blind execution. You submit an order and hope it fills. When it does not, you get a vague error. You do not know if the book was thin, if your size was too large, or if the venue rejected you for another reason. No portfolio view. Neither platform gives you a unified view of your positions, PnL, and risk across venues. No risk awareness. You might have five positions that all depend on the same outcome. Nothing warns you about that concentration.What Siren does about it
One terminal for all markets. Kalshi and Polymarket markets in a single feed. Browse, compare, and trade without switching apps. Adaptive execution. When your full order cannot fill, Siren steps down the size automatically (75%, 50%, 25%, 10%) instead of just failing. If the orderbook side is empty, it falls back to CASH settlement. Clear trade outcomes. Every trade gives you a result you can understand: what filled, what did not, and why. Unified portfolio. All your positions, balances, PnL, and execution history in one place. Risk intelligence. Siren detects correlated positions, flags concentration risk, and warns about low liquidity.What Siren is not
- Not a venue. Siren routes to Kalshi and Polymarket. It does not run its own orderbook.
- Not a leverage product.
- Not a token launchpad.