Oddpool
Unified prediction-market data API across Kalshi and Polymarket
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About Oddpool
Oddpool is a data aggregation and analytics platform for prediction markets that normalises odds, order books and fills from Kalshi and Polymarket onto one schema, so the same event's price on different venues can be compared directly. The interface offers dashboards grouped by sports, politics, crypto, entertainment and economics, showing spreads, volume and book depth, and raises real-time alerts on large trades so flows of size can be observed.
An arbitrage view sums both sides' prices, deducts fees, computes net edge and return, ranks the results and pushes combinations that clear a threshold. Beyond the self-serve interface there is an API: historical books are archived in columnar files and can rebuild book state at any timestamp, while a live stream publishes per-venue probabilities on a unified topic for quantitative teams and research desks to consume in their own systems, metered in tiers by usage.
Oddpool was founded in 2026 by Avi (CEO) and Ritesh (CTO) in San Francisco as an institutional-grade data layer for prediction markets. It graduated from Y Combinator's Spring 2026 batch and completed a $3 million seed round (, ). The company addressed fragmentation across venues, missing tick-level history, and data normalization overhead by building a universal symbology and full-depth orderbook/trade archives (). It launched a prosumer tier and reached several thousand dollars in monthly recurring revenue within months (). In September 2026, Oddpool joined CFTC-regulated exchange Kalshi to build integrated data infrastructure within the ecosystem, marking a shift from external partner to core infrastructure provider for institutional adoption (, ). These milestones represent its evolution from a niche tool into foundational market infrastructure.
On November 24 Oddpool released an arbitrage scanner, its first paid feature, refreshing cross-venue gaps every 30 seconds with net profit after fees. On December 8, 2025 it shipped a dashboard hub plus 25 free dashboards; on January 12, 2026 it added whale tracking, opened an API on January 23, added live order books and a trade feed on January 25, and connected a third venue, Opinion, on February 16.
A $100-per-month Premium tier followed on March 11, paper trading on March 15, and the Oddbot AI analyst on May 6. Oddpool joined Y Combinator's Spring 2026 batch and launched with it on May 11.
Oddpool will turn full-depth tick-level order books and universal tickers into an institutional data layer, sell API access to quant funds and market makers, and keep widening venue coverage.
Avi Arora: Co-Founder & CEO. Previously ML Researcher at Microsoft, where he developed a prompt injection defense model handling 20B requests/year and built an internal agent evaluation platform running 1M benchmarks/year. Holds a Master's in CS from Georgia Tech (ML specialization).
Ritesh Malpani: Co-Founder & CTO. Previously SWE at Bloomberg, architected systems processing 100K+ TPS across trading infrastructure. Also interned at Amazon, American Express, and PennyMac. Holds a Master's in CS from Georgia Tech.