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Oddpool: what it does, what it costs, where it stops
Last checked 2026-09-08
Oddpool is a Y Combinator-backed data platform that normalizes Kalshi and Polymarket into one feed: event dashboards with cross-venue odds, a divergence view with fee and spread context, historical order books, and a REST plus WebSocket API. Its arb dashboard also lists Opinion.
As of this check, the free tier is open and the paid tiers are not. The pricing page states Oddpool is no longer accepting new subscriptions, with existing subscriptions and free accounts continuing as normal.
What it does
The free tier gives 750+ event dashboards with cross-venue odds, paper trading, historical charts, one API key with 1,000 requests per month, one WebSocket connection on distribution channels, and about 30 Oddbot AI chats per month.
The homepage advertises 700K+ searchable markets, live probability distributions, full tick history, and fee and spread context attached to divergence data. The arb dashboard updates every 30 seconds and showed 762+ opportunities spotted in the prior week when checked.
- 750+ event dashboards with Kalshi and Polymarket odds side by side
- Arb scanner across Kalshi, Polymarket and Opinion, 30-second updates
- REST API at api.oddpool.com with X-API-Key auth, WebSocket feeds
- Historical order book snapshots, time series and trade records for both venues
Pricing
Free: $0 forever, no card, 1,000 requests per month. Pro: $30 per month, listed with the full dashboard suite, 10 requests per second, 1M monthly quota, 3 WebSocket connections. Premium: $100 per month, 25 requests per second, 5M quota, 10 connections, plus the Arbitrage and Price Spreads APIs. Enterprise: custom.
Pro and Premium are marked not available. The full arb scanner and the spread APIs sit behind those tiers, so a new user today gets the free dashboards and a limited arb demo.
Venues and data
The docs list Kalshi and Polymarket as supported venues, with historical data for both. The arb dashboard names Opinion as a third scanned venue. The site attaches a disclaimer that its aggregated probabilities are informational only.
Where it falls short
The paid product is closed to newcomers. If you did not subscribe before the freeze, the divergence tooling with fee context is a demo, and the Arbitrage and Price Spreads APIs are out of reach.
1,000 free requests per month is a prototype budget, not a polling one. And Oddpool does not execute; a divergence it flags is traded on each venue, or through a cross-venue terminal.
Who should use it
Researchers and traders who want free Kalshi versus Polymarket dashboards and a small API allowance. Anyone needing the paid scanner should look at ArbBets or Prediction Hunt until Oddpool reopens subscriptions.
Questions about Oddpool
Is Oddpool free?
There is a free tier with 750+ dashboards and 1,000 API requests per month. Paid tiers at $30 and $100 per month are listed but closed to new subscribers.
Is Oddpool still accepting new subscriptions?
No. The pricing page states Oddpool is no longer accepting new subscriptions; existing subscriptions and free accounts continue.
Does Oddpool compare Kalshi and Polymarket?
Yes. Cross-venue odds dashboards and divergence tracking for Kalshi and Polymarket are its core, with Opinion on the arb scanner.
Does Oddpool have an API?
Yes. REST at api.oddpool.com with X-API-Key auth and WebSocket feeds, documented at docs.oddpool.com.
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