On-chain prediction market platform Polymarket has acquired Dome, a startup that builds a unified API for prediction markets. While the companies did not disclose the deal amount, this is Polymarket’s second public acquisition, following its 2025 purchase of the U.S.‑licensed derivatives exchange QCEX.
What Dome Adds to Polymarket’s Stack
Using a single API provided by Dome, developers can connect to multiple prediction platforms, such as Polymarket and Kalshi. Through its infrastructure, venues that often function in silos can access real-time and historical market data, pricing, order books, and standardized contract information.
Developers are already using Dome to create cross-platform embedded widgets, trading bots, analytics dashboards, and portfolio tools. The startup helps apps route orders or queries to the optimal market by providing SDKs and documentation that minimize integration work.
Dome joined Y Combinator’s Fall 2025 batch and raised a total of $5.2 million, including a $500,000 YC investment and a $4.7 million seed round. Its founders, Kurush Dubash and Kunal Roy, previously worked on blockchain infrastructure at Alchemy and have long‑standing ties to Polymarket from earlier engineering work.
Why Polymarket Is Buying Data and Connectivity
Polymarket has become one of the largest real‑money prediction markets, with activity around politics, sports, and broader “bet‑on‑anything” events. As more platforms list overlapping markets, liquidity, and data have spread out, it has become harder for traders and apps to find accurate odds in one place.
By acquiring Dome, Polymarket gains direct control over infrastructure that unifies fragmentation and standardizes access across prediction venues. That setup can support cross‑platform arbitrage tools, richer analytics, and multi‑venue interfaces that still treat Polymarket as a core liquidity hub.
The deal also fits Polymarket’s broader strategy of pairing infrastructure with licensing and distribution. QCEX strengthened its regulated U.S. footprint, while Dome focuses on developer tools to increase usage among external builders.
Polymarket has signed distribution partnerships with groups like Major League Soccer, the National Hockey League, and Substack to surface markets within mainstream channels. Analysts say Dome’s unified API could make those integrations more powerful if third‑party products choose Polymarket as their main prediction venue while still reading data from rivals.
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