Onchain predictions market provider Polymarket has acquired the relatively fresh startup Dome for an undisclosed sum, according to an announcement on Thursday.
Dome, part of startup accelerator Y Combinator’s Fall 2025 cohort, offers a unified API for prediction markets. In other words, it allows developers to build apps, bots, dashboards, or trading tools that work across platforms like Polymarket, Kalshi, and other platforms.
The startup raised $500,000 from YC and a $4.7 million seed, according to the X bio of co-founder Kunal Roy, who was also a founding engineer at Alchemy. Kurush Dubash, the other listed co-founder, is also a founding engineer at Alchemy, according to his YC bio.
“We’re excited to bring our focus on speed, reliability, and dev experience to the world’s largest prediction market!” Dome wrote on X.
Polymarket, last valued at $9 billion, reportedly has plans to raise fresh capital at a higher valuation, but has not made many acquisitions. Its purchase of U.S.-licensed derivatives exchange QCEX spearheaded the firm’s reentrance into the United States, after previously being barred by the CFTC.
The firm has signed numerous distribution deals, including sports leagues like Major League Soccer and the National Hockey League, as well as media enterprises, most recently including Substack.
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