Polymarket Acquires Prediction Market API Startup Dome

Odaily News: On-chain prediction market platform Polymarket has announced the acquisition of prediction market API startup Dome, with the transaction amount undisclosed. This marks Polymarket's second official acquisition.

Dome is a Y Combinator Fall 2025 incubated project, providing a unified prediction market API that helps developers build applications, trading bots, and data dashboards capable of connecting to multiple platforms such as Polymarket and Kalshi simultaneously. The company previously received a $500,000 investment from YC and completed a $4.7 million seed funding round.

Polymarket currently holds a valuation of approximately $9 billion and has been continuously expanding its business footprint through mergers, acquisitions, and partnerships. It previously acquired the US-licensed derivatives exchange QCEX to facilitate its re-entry into the US market. Concurrently, the company has established distribution partnerships with entities including Major League Soccer (MLS), the National Hockey League (NHL), and media platform Substack.