Dome
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.
- Company typePrivate
- Founded2025
- HeadquartersNew York, United States
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
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.
Dome firmographics
Firmographics- 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
Dome industry classification
Industry- 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
Where Dome is headquartered
LocationHeadquarters
- HQ city
- New York
- HQ country
- United States
- HQ region
- North America
Markets served
Dome business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- API Subscription: Paying customer subscriptions with QPS (queries per second) limits and upgraded features. Subscriptions were canceled after acquisition announcement but features retained.
- Freemium Tier: Free tier providing 10 QPS access (increased from 1 QPS). Paying customers received higher QPS limits and upgraded features.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free tier with 10 QPS access |
| Subscription | Monthly | Paid tier with higher QPS limits and upgraded features |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels4 records
Dome product offering
Product offeringCore 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.
Companies that use Dome
Customer profileSegments1 record
Ideal customer profiles1 record
Dome technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration2 records
Feature4 records
Dome partnerships and signals
Strategic signalScale indicators2 records
Recent moves7 records
Expansion highlights4 records
Dome competitors and assessment
Company assessmentOthers
- 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
Dome social profiles
Digital presenceDome financial estimates
Financial estimateRevenue estimate
Valuation estimate
Dome leadership team
Management profileNumber of profiles
Profiles2 records
Dome funding detail
Funding detailFunding overview
Funding rounds2 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Dome M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Dome
What does Dome do?
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.
Is Dome a public or private company?
Dome is a private company. It is classified as corporate owned and is currently acquired.
When was Dome founded?
Dome was founded in 2025. It employs 1 to 10 people.
Where is Dome based?
Dome is headquartered in New York, United States, in the North America region.
How does Dome make money?
Two revenue lines are on record. API Subscription is the primary driver. The others are freemium Tier.
Who are Dome's main competitors?
Others on record are Kalshi and Polymarket. Direct peers are Goldsky, The Graph, CoinGecko API, Dune Analytics and Pyth Network. Broad incumbents are Chainlink and Alchemy. Messari is listed as an emerging player.
Does Dome have an API?
Yes. Dome provides a unified API for prediction markets that enables developers to access granular market data including live trades, historical orderbook data, and pricing information across multiple platforms. The API supports real-time data retrieval via REST endpoints and streaming updates via webhooks and websockets. It offers a unified SDK supporting TypeScript and Python that connects to multiple prediction markets including Polymarket and Kalshi through a single integration layer. Developer documentation is at docs.domeapi.io.
What industry is Dome in?
Dome's product category is Prediction Market API Infrastructure. Its primary akta.pro industry code is BPAMAOAD, Developer Tooling & SDK Platforms, with a secondary code of BPAMADAG, Developer Portals, SDKs & Documentation Platforms. Its NAICS code is 513210 and its SIC code is 7371.