Polymarket has acquired Dome, a Y Combinator-backed startup that is building a unified API solution for developers to access and build across multiple prediction market platforms.

The acquisition was confirmed by both companies in a Feb. 19 post on X, though neither side shared details about Dome’s future roadmap within Polymarket or how the team will be integrated. The financial terms of the deal were not disclosed.

According to details from Y Combinator, Dome was part of its Fall 2025 cohort and is developing a unified API for prediction markets through a single integration layer, where “developers can access live and historical data.”

“Dome makes it simple to trade, embed market data into products, and deploy strategies across multiple platforms through one interface,” it said.

Dome raised $500,000 from Y Combinator and secured a further $4.7 million in seed funding, according to details shared on the X profile of co-founder Kunal Roy, who, alongside Kurush Dubash, previously served as founding engineers at Alchemy.

“We’re obsessed with prediction markets and want to have the biggest impact in the space. There’s no better place to do that than Polymarket.” Dubash wrote on X.

Besides QCEX, a derivatives exchange and clearinghouse licensed by the U.S. Commodity Futures Trading Commission, which Polymarket acquired in a bid to re-enter the country, Dome marks the company’s first official acquisition focused on developer infrastructure.

Since it was greenlighted by the commission to operate an intermediated trading platform, Polymarket has secured multiple major partnerships with media brands like Yahoo Finance and Google Finance, alongside sports organizations such as Major League Soccer and the National Hockey League.

Last month, the company partnered with Parcl to launch a prediction market tied to real estate trends. It has also expanded onto the Solana blockchain through an integration with Jupiter and was recently added to the MetaMask mobile app, widening its retail distribution.