For Traders & Bot Developers

Cross-platform arbitrage,
finally possible

We match the same event across Polymarket, Kalshi & PredictIt. You spot the spread instantly. Sub-10ms streaming, unified schema, zero event-matching code.

Be first to know when we launch. No spam, ever.

Live Demo

Cross-platform price comparison

Same events, different prices. We've already matched them for you.

Arbitrage Opportunities Live

Event	Polymarket	Kalshi	PredictIt	Spread
Trump wins 2024	0.52	0.48	0.50	4.0%
BTC above $100k EOY	0.67	0.63	0.65	4.0%
Fed cuts rates Jan	0.12	0.15	0.14	3.0%

Events are automatically matched across platforms using semantic similarity. No manual mapping required.

The Problem

Why unified data matters for trading

Without Probalytics

-3 different APIs with 3 different schemas
-Manual event matching (is "BTC $100k" the same as "Bitcoin to hit $100,000"?)
-Build and maintain your own normalization layer
-Weeks of engineering before you can even detect arbitrage

With Probalytics

+One API, one schema, all platforms
+Events automatically matched using semantic similarity
+Query cross-platform spreads with a single call
+Start detecting arbitrage in minutes, not weeks

arbitrage-bot.ts

// Stream the SAME EVENT from ALL platforms - already matched
for await (const event of client.events.stream('us-election-2024')) {
  // event.prices = { polymarket: 0.52, kalshi: 0.48, predictit: 0.50 }
  if (event.maxSpread > 0.03) {
    executeCrossArbitrage(event)
  }
}

Trading Features

Built for serious traders

Sub-10ms Latency

Server-Sent Events deliver price updates faster than any polling solution.

Automatic Event Matching

"BTC $100k" on Polymarket = "Bitcoin to reach $100,000" on Kalshi. We link them for you.

Cross-Platform Spreads

Query price differences across platforms with a single API call.

5 Years of History

Backtest cross-platform strategies on normalized historical data since 2020.

Performance

Speed matters in trading

~10ms

Probalytics SSE

Real-time streaming, instant updates

1-5s

API Polling

Rate limited, always behind

Variable

Direct Blockchain

Block times, reorgs, complexity

Comparison

Why traders choose Probalytics

Feature	DomeAPI	Direct APIs
Single API
Unified schema
Cross-platform event matching
Real-time SSE streaming		Varies
5+ years historical data	Limited	Varies

Start Trading Smarter

Ready to detect cross-platform arbitrage?

Join the waitlist and be among the first to trade with unified prediction market data.