Polymarket Acquires Dome to Boost Prediction API

Polymarket has acquired YC backed startup Dome to strengthen its prediction market API infrastructure and expand tools for developers building on top of prediction platforms.

Key Takeaways

• Polymarket acquired Dome, a Y Combinator backed startup building a unified prediction market API.
• Dome’s API lets developers connect to multiple platforms like Polymarket and Kalshi through one integration.
• The deal is Polymarket’s second official acquisition after buying QCEX, a US licensed derivatives exchange.
• Dome previously raised $500,000 from Y Combinator and $4.7 million in seed funding, showing strong early investor interest.

What Happened?

Polymarket confirmed it has acquired Dome for an undisclosed amount, with both companies sharing the news publicly on Feb. 19. The move brings Dome’s unified API effort into Polymarket’s ecosystem as the prediction market platform pushes to improve developer access and expand integrations.

Why Polymarket Wanted Dome?

Dome is focused on a simple idea that developers love: build once, connect everywhere. The startup has been developing a unified API layer that allows builders to plug into multiple prediction market platforms through a single integration.

Instead of engineering separate connections to different venues, developers can use Dome’s infrastructure to power products that work across platforms, including Polymarket and Kalshi. That matters because prediction markets are no longer just a niche crypto corner. As more users show up, especially professional users, the demand for fast, reliable data and execution tools keeps growing.

With Dome inside the company, Polymarket strengthens its core technology stack and signals that it wants to be the easiest prediction market to build on.

What Dome Built and Why It Matters?

Dome’s technology is aimed at developers who want to create tools that sit on top of prediction markets, including:

• Apps for browsing and trading markets.
• Bots and automated strategies.
• Dashboards for traders and analysts.
• Trading tools that can operate across more than one venue.

The value is not just convenience. A unified API can also shorten development time, reduce operational headaches, and make it easier to maintain products long term.

In its announcement on X, Dome said, “We’re excited to bring our focus on speed, reliability, and dev experience to the world’s largest prediction market!” The startup also said it will keep working on improving developer tools within the broader ecosystem.

Dome’s Background and Funding

Dome was part of Y Combinator’s Fall 2025 cohort, and it raised $500,000 from Y Combinator along with $4.7 million in seed funding. Those numbers show it was not just an idea stage project. It had enough capital to build real integrations and prove demand.

The company was founded by Kunal Roy and Kurush Dubash. Public profiles say both were founding engineers at Alchemy, which is known for developer infrastructure in crypto. That background fits Dome’s focus on speed, reliability, and developer experience.

Polymarket’s Broader Expansion Strategy

Polymarket has been expanding through a mix of acquisitions and partnerships. The Dome deal is its second official acquisition after its purchase of QCEX, a US licensed derivatives exchange. That QCEX deal supported Polymarket’s return to the United States market after earlier regulatory restrictions.

The company was last valued at $9 billion, and reports have suggested it may look to raise more funding at a higher valuation, though Polymarket has not confirmed any new fundraising plans.

On the distribution side, Polymarket has also signed partnerships with Major League Soccer and the National Hockey League, and it has partnered with media platforms including Substack. The company has also announced a partnership with USDC, stating that it aims to deliver faster execution, lower friction, and trusted collateral as prediction markets scale. That is another sign Polymarket is thinking about infrastructure and reach, not just adding new markets.

Developer Ecosystem and Market Momentum

Prediction markets rely on participation and liquidity, but they also rely on the tools that bring people in. Better APIs tend to create better third party products, which often brings more users and more trading activity.

Polymarket has said it wants to improve developer access, and it echoed that goal by stating, “We’re committed to creating the best developer experience in prediction markets.” With Dome’s unified API efforts, Polymarket now has a clearer path to making cross platform tools easier to build and maintain.

CoinLaw’s Takeaway

I see this as Polymarket making a smart infrastructure bet, not a flashy headline grab. In my experience, platforms win long term when developers can build quickly and trust the pipes underneath. A unified API sounds boring until you realize it can shape everything from trading bots to media widgets to analytics dashboards. If Polymarket really wants to be the default place people go for prediction markets, improving the developer experience is one of the fastest ways to get there.

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