Polymarket Acquires YC-Backed API Startup Dome in Push to Expand Prediction Market Infrastructure
Polymarket has acquired Y Combinator backed startup Dome to expand developer infrastructure and unify API access across prediction markets. The deal marks its second acquisition as the platform deepens investment in cross market integration and technical scalability.
Polymarket has acquired Y Combinator-backed startup Dome, marking its second confirmed acquisition as the prediction market platform expands its developer infrastructure. Financial terms were not disclosed.
The deal was announced Feb. 19 via posts on X by both companies. It follows Polymarket’s earlier acquisition of CFTC-licensed derivatives exchange QCEX and signals a continued focus on strengthening its technical and regulatory foundation.
Dome, part of Y Combinator’s Fall 2025 cohort, built a unified API that allows developers to connect to multiple prediction market platforms through a single integration. The system supports trading bots, dashboards and analytics tools by providing access to live and historical market data across venues including Polymarket and Kalshi.
The startup raised about $500,000 from Y Combinator and approximately $4.7 million in seed funding. Its co-founders, Kunal Roy and Kurush Dubash, previously worked as founding engineers at blockchain infrastructure firm Alchemy.
Polymarket said integrating Dome’s API technology will reduce technical friction for developers building cross-platform tools, a step that could improve interoperability in a sector that remains fragmented across protocols and interfaces.
The acquisition also aligns with Polymarket’s broader expansion strategy. The company has pursued distribution partnerships with organizations such as Major League Soccer and the National Hockey League, as well as media platforms including Substack, as it seeks to broaden adoption beyond crypto-native users.
Founded in 2020 and headquartered in New York, Polymarket previously resolved enforcement action from the U.S. Commodity Futures Trading Commission and later acquired QCEX to support compliant U.S. operations. The company was recently valued at roughly $9 billion.
Neither company provided details on integration timelines or team restructuring. Market participants are watching whether the move accelerates infrastructure standardization across prediction markets, an area that has drawn increasing developer and institutional interest as event-linked trading volumes grow.