Dome

What Dome does

Dome Inc. was a developer infrastructure startup that provided a unified API layer for accessing and building on top of prediction markets. Founded in 2025 in New York by former Alchemy engineers Kurush Dubash and Kunal as part of Y Combinator's Fall 2025 cohort, the company addressed the integration fragmentation problem faced by developers working across prediction market platforms. Its target users were individual developers and small teams building trading tools, backtesting strategies, and market analysis applications across platforms such as Polymarket and Kalshi. The company described its value proposition in terms of reliability, speed, and developer experience, with no named enterprise customers and a horizontal developer persona segmentation.

Dome's core technology consisted of a unified API and SDK (distributed via npm for TypeScript and Python) that abstracted the complexity of connecting to multiple prediction market platforms through a single integration layer. The product surface included four primary capabilities: a Unified API aggregating live trades, market prices, and orderbook data from Polymarket, Kalshi, and other venues; Historical Data Access providing orderbook and pricing data not available directly from market providers, enabling backtesting at specific timestamps; a Unified SDK for cross-platform integration; and Real-Time Updates delivered via webhooks and websockets for trades, positions, and live orderbook streaming. The company operated a Discord community and published comprehensive technical documentation at docs.domeapi.io to support developer adoption.

Dome's go-to-market was product-led growth, targeting developers through self-serve API signup, free tier access, and community engagement. Revenue came from monthly API subscriptions tied to QPS (queries per second) limits and premium features, alongside a freemium tier. The company raised a total of $5.2 million ($500K from Y Combinator and a $4.7M seed round). On February 19, 2026, Polymarket acquired Dome in an undisclosed transaction as its second official acquisition. Following the announcement, all paying subscriptions were canceled, free tier limits were raised from 1 QPS to 10 QPS, and Dome committed to dedicated support only through March 31, 2026, after which SLAs and support could not be guaranteed. Post-acquisition, Dome's co-founders joined Polymarket's team.

Name

Dome

Legal name

Dome Inc.

Website

https://domeapi.io

Company type

Private

Founded year

2025

Operating status

Acquired

Headcount range

1–10 employees

Short description

Dome Inc. provided a unified API and SDK for developers building on prediction market platforms including Polymarket and Kalshi. Founded in 2025 as a YC F25 startup, the company was acquired by Polymarket in February 2026 to expand its developer ecosystem.

Ownership category

akta.pro rank

Product category

Prediction Market API Infrastructure

NAICS

Software Publishers (513210), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182), Computer Systems Design and Related Services (54151)

SIC

Services-Computer Programming Services (7371), Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Developer Tooling & SDK Platforms (BPAMAOAD)

akta.pro secondary industries

Developer Portals, SDKs & Documentation Platforms (BPAMADAG), Smart Contract Frameworks & SDKs (developer kits, templates, standards) (FSAPABAB)

Keywords

• Prediction market API
• Unified developer SDK
• Historical market data
• Real-time market streaming
• Blockchain developer tools

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations

Revenue model

1. API Subscription: Paying customer subscriptions with QPS (queries per second) limits and upgraded features. Subscriptions were canceled after acquisition announcement but features retained.
2. Freemium Tier: Free tier providing 10 QPS access (increased from 1 QPS). Paying customers received higher QPS limits and upgraded features.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Dome provides a unified API and SDK infrastructure layer that aggregates prediction market data from multiple platforms (Polymarket, Kalshi, and others) into a single integration interface. Developers use the platform to access historical orderbook and pricing data, live trades, and real-time market updates via REST endpoints, webhooks, and websockets to build trading tools, backtesting strategies, and market analysis applications.

Product overview

Dome is a unified API infrastructure product for prediction markets, offering a single integration layer that connects to multiple prediction market platforms including Polymarket and Kalshi. The core product consists of the Dome Unified API, complemented by a TypeScript/Python SDK available via npm, historical data access for backtesting, and real-time updates via webhooks and websockets. Formerly Y Combinator Fall 2025 cohort company, co-founded by former Alchemy engineers, now acquired by Polymarket.

Differentiator

Problem solved

Functional benefit

Products and services

• Dome Unified API A unified REST API layer that aggregates prediction market data from multiple platforms (Polymarket, Kalshi, and others) into a single interface, enabling developers to access historical orderbook data, market prices, live trades, and real-time updates through one integration.
• Dome Unified SDK A unified software development kit supporting TypeScript and Python that enables developers to connect to multiple prediction market platforms with a single integration, distributed via npm as @dome-api/sdk.

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature4 records

Scale indicators2 records

Recent moves7 records

Expansion highlights4 records

Others

• Kalshi: Kalshi is a US-regulated event-contracts exchange and Dome's other primary data integration. Not a peer in the API-aggregator sense, but its API surface, data terms, and market roadmap shape Dome's addressable functionality.
• Polymarket: Polymarket is the largest on-chain prediction market and Dome's acquirer and primary data source. Not a competitor post-acquisition, but its native developer offerings and data-access policies directly determine Dome's strategic ceiling.

Direct peers

• Goldsky: Goldsky offers real-time blockchain data APIs and subgraphs with hosted indexing for Web3 developers. Highly comparable to Dome in product shape (developer-first data API + subgraphs) and target customer (crypto application builders).
• The Graph: The Graph provides a decentralized indexing and query API layer for blockchain data via GraphQL subgraphs — a directly analogous developer-tooling-and-API-platform play, applied to general on-chain data rather than prediction markets specifically.
• CoinGecko API: CoinGecko's API aggregates market data across crypto exchanges and tokens into a single developer interface. Conceptually the closest analog to Dome's "unified API for one asset class" thesis, but applied to spot crypto pricing rather than prediction markets.
• Dune Analytics: Dune provides a query and analytics platform over blockchain data with community-built dashboards and an API tier. Overlaps with Dome on historical-data access for crypto applications and developer-first data tooling.
• Pyth Network: Pyth is a first-party oracle network that aggregates low-latency market data from exchanges and trading firms for on-chain consumption. Comparable to Dome in providing real-time, multi-venue market data through a developer API for DeFi/crypto builders.

Broad incumbents

• Chainlink: Chainlink is the dominant oracle and data-infrastructure provider for smart contracts, offering price feeds, data streams, and developer APIs. Broadly comparable to Dome as a multi-source crypto data API serving developers, though at vastly larger scale and across use cases.
• Alchemy: Alchemy is a leading blockchain developer infrastructure platform offering node services, APIs, and SDKs across multiple chains. Dome's founders are Alchemy alumni, and Dome follows a similar unified-developer-API pattern applied to the narrower prediction-market vertical.

Emerging players

• Messari: Messari provides standardized crypto data, research, and APIs for institutional and developer users. Comparable to Dome as a multi-source data API serving crypto builders, though focused on research and asset pricing rather than prediction-market microstructure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/getdomeapi
• LinkedInlinkedin.com/company/dome-api

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds2 records

Investors5 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dome