PolyHistorical vs Kaiko: Prediction Market Data Compared
How does PolyHistorical compare to Kaiko for crypto prediction market data? We break down pricing, data granularity, and coverage.
Overview
Kaiko is a well-known institutional crypto market data provider covering centralized exchanges. PolyHistorical focuses specifically on Polymarket prediction market data with sub-second order book snapshots — a niche Kaiko does not cover.
Data Coverage
| Feature | PolyHistorical | Kaiko |
|---|---|---|
| Prediction Market Data | ✓ Full order book history | ✗ Not available |
| BTC/ETH/SOL Up/Down Markets | ✓ 5m, 15m, 1h (+ BTC 4h, 24h) | ✗ |
| Snapshot Granularity | Sub-second (300ms) | 10s–1min (exchange data) |
| CEX Spot/Derivatives | ✗ | ✓ 100+ exchanges |
| Order Book Depth | ✓ Full bid/ask depth | ✓ Top of book + depth |
Pricing
Kaiko's institutional plans start at $5,000+/month. PolyHistorical offers a free tier with BTC data and a Pro plan at $11/month for all coins with unlimited history.
When to Choose PolyHistorical
- You need Polymarket-specific historical order book data
- You want sub-second granularity for backtesting prediction markets
- You're a startup or indie developer who can't afford institutional pricing
When to Choose Kaiko
- You need broad CEX coverage across 100+ exchanges
- You're building institutional-grade trading infrastructure
- You need derivatives and options data
Quick Start: Fetch Polymarket Data
import requests
API_KEY = "your_api_key"
resp = requests.get(
"https://api.polyhistorical.com/v1/markets",
headers={"X-API-Key": API_KEY},
params={"coin": "BTC", "active": "true"}
)
markets = resp.json()["data"]
for m in markets:
print(f"{m['slug']} — Up: {m['price_up']}, Down: {m['price_down']}")