the on-chain prediction market platform Polymarket announced the acquisition of prediction market API startup Dome, with the transaction amount undisclosed. This is Polymarket's second official acquisition.
Dome is a Y Combinator Fall 2025 incubation project, providing a unified prediction market API to help developers build applications, trading bots, and data dashboards that can connect 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 round financing.
Polymarket is currently valued at approximately $9 billion and has been continuously expanding its business through acquisitions and partnerships recently. It previously acquired the US licensed derivatives exchange QCEX to help it re-enter the US market; meanwhile, the company has established distribution partnerships with Major League Soccer (MLS), the National Hockey League (NHL), and media platform Substack.
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