TLDR
- Polymarket acquires YC-backed API startup Dome for undisclosed terms
- Dome raised $500,000 from YC and $4.7 million in seed funding
- Dome enables unified API access across Polymarket and Kalshi
- The deal marks Polymarket’s second official acquisition after QCEX
Polymarket has acquired Dome, a prediction market API startup, for an undisclosed amount. The purchase marks the company’s second official acquisition after QCEX.
Dome was part of Y Combinator’s Fall 2025 cohort. The startup offers a unified API that connects multiple prediction market platforms. Developers can use it to build apps, bots, dashboards, and trading tools across services such as Polymarket and Kalshi.
Polymarket announces acquisition of Dome, terms undisclosed. Dome, part of Y Combinator’s Fall 2025 cohort, provides a unified API for prediction markets, enabling developers to build apps, bots, dashboards, or trading tools across platforms like Polymarket and Kalshi. Dome…
— Wu Blockchain (@WuBlockchain) February 20, 2026
Polymarket confirmed the deal on Thursday. Dome also shared the news on X, stating, “We’re excited to bring our focus on speed, reliability, and dev experience to the world’s largest prediction market.”
Dome’s Technology and Background
Dome was founded by Kunal Roy and Kurush Dubash. Both founders were founding engineers at Alchemy, according to public profiles. The company focused on building infrastructure that simplifies access to prediction market data.
The startup raised $500,000 from Y Combinator. It also secured $4.7 million in seed funding. This capital supported product development and early integrations with prediction platforms.
Dome’s API allows developers to connect to several markets through a single interface. This reduces the need to manage separate integrations. As a result, development time can be shortened and operational processes simplified.
The platform aimed to support trading tools and automated strategies. It also enabled dashboards and analytics products. By offering unified access, Dome positioned itself as infrastructure for cross-platform prediction markets.
Polymarket’s Expansion Strategy
Polymarket was last valued at $9 billion. Reports indicate that the company plans to raise additional capital at a higher valuation. The company has made few acquisitions to date.
The purchase of QCEX marked its return to the United States market. QCEX is a U.S.-licensed derivatives exchange. That deal followed earlier regulatory action that had barred Polymarket from operating in the U.S.
With the Dome acquisition, Polymarket adds developer-focused infrastructure to its portfolio. The company has also entered several distribution partnerships. These include agreements with Major League Soccer and the National Hockey League.
Polymarket has also partnered with media platforms, including Substack. In addition, it announced a partnership with USDC. The company stated that this partnership aims to ensure faster execution, lower friction, and trusted collateral as prediction markets scale.
Developer Ecosystem and Market Position
Prediction markets have gained wider attention in recent years. Platforms allow users to trade on outcomes tied to events and data. Access to reliable APIs is important for third-party developers.
Dome’s technology supports this need by offering unified access. This can help developers build tools that function across multiple exchanges. It may also increase interoperability between platforms.
Polymarket has stated that it aims to create a strong developer experience. In its announcement, the company wrote, “We’re committed to creating the best developer experience in prediction markets.”
By integrating Dome’s infrastructure, Polymarket strengthens its technical capabilities. The acquisition expands its internal resources while adding external developer tools.
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