Predictions.io Tracks Over 7,700 Kalshi and Polymarket Contracts

United States.- 16 October 2026 | www.zonadeazar.com Predictions.io, a prediction market analytics and monitoring platform, provides a digital ecosystem allowing users to explore, compare and analyse event-based contracts across multiple trading venues.

The service primarily integrates information from Kalshi and Polymarket, enabling comparisons of implied probabilities, monitoring of large traders and identification of pricing differences between equivalent markets.

According to figures published on 15 October 2026, Predictions.io tracks more than 7,700 open markets, bringing together information from two of the sector’s leading platforms.

The service aims to establish itself as an analytics resource for traders, researchers and users interested in understanding prediction market activity.

More Than 7,700 Markets Tracked

The platform features a dashboard consolidating data from different markets and events.

As of 15 October 2026, its principal indicators included:

• Open markets tracked: approximately 7,700.
• Polymarket markets: around 2,930.
• Kalshi markets: approximately 4,800.
• Displayed Polymarket volume: US$6.3 billion.
• Displayed Kalshi volume: US$2 billion.
• Curated topic categories: 23.

These figures reflect Predictions.io’s published metrics and may change as new contracts are introduced and existing markets close.

The displayed trading volumes do not represent Predictions.io revenue. Instead, they reflect activity metrics associated with the underlying prediction markets.

Cross-Platform Probability Comparisons

One of Predictions.io’s principal features allows users to compare contract prices linked to the same future event.

Implied probabilities may differ between Kalshi and Polymarket due to variations in:

• Available liquidity.
• Trader participation.
• Transaction costs.
• Contract conditions.
• Trading volumes.
• Market expectations.

The platform brings this information together to help users identify pricing differences.

However, a discrepancy between probabilities does not necessarily represent a profitable trading opportunity.

Users must also consider fees, liquidity and contract settlement rules.

Tools for Analysing Fees and Profitability

Predictions.io provides several calculators designed to support market analysis.

These include:

Odds Converter

Converts American, decimal and fractional odds into implied probabilities.

Fee Calculator

Helps estimate transaction costs associated with particular contracts, especially those traded on Kalshi.

Breakeven Calculator

Identifies the probability required for a contract to cover its purchase price and applicable trading fees.

These tools aim to provide a more complete understanding of participation costs rather than relying exclusively on displayed contract prices.

Monitoring Large Traders

Another important feature is the ability to analyse activity involving traders with substantial transaction volumes.

Predictions.io provides monitoring tools commonly described as Whale Tracking.

The functionality allows users to observe significant market activity and review information related to prominent participants.

The platform also provides trader profiles displaying activity and historical performance indicators.

Its objective is to help users identify trends and understand how certain transactions may influence market expectations.

However, large traders’ behaviour does not guarantee future event outcomes.

Politics, Sports and Cryptocurrency Categories

Predictions.io organises contracts into thematic sections known as Lobbies.

The platform currently displays 23 categories covering different events.

Principal topics include:

• US politics and elections.
• NFL and NBA.
• International football.
• NHL.
• Cryptocurrency.
• Economics and financial markets.
• Formula 1.
• Esports.
• Technology and artificial intelligence.
• International events.

Users can explore contracts associated with each category and review their principal indicators.

This structure makes it easier to monitor sectors attracting substantial market activity.

NFL Accounts for Thousands of Markets

Sport occupies a prominent position within the Predictions.io catalogue.

In its 15 October update, the platform displayed approximately 4,300 NFL-related markets.

It also tracked around 1,760 ice hockey markets and approximately 680 football markets.

Sports categories include contracts involving match results, championships and other future events.

The breadth of these markets demonstrates the increasing significance of sport within the prediction market ecosystem.

However, the regulatory treatment of sports-event contracts varies between jurisdictions.

Social Features and Trader Following

Predictions.io also incorporates tools designed to develop a community around prediction market analysis.

Through a free account, users can:

• Bookmark selected markets.
• Follow other traders.
• Explore participant profiles.
• Join discussions.
• Review trading activity and historical indicators.

General market browsing does not require account registration.

These features complement data analysis with social functionality, allowing users to share observations and follow relevant market developments.

A Dedicated API for Developers

Alongside its public interface, Predictions.io provides market information through a REST API.

The service is designed for developers seeking to integrate prediction market data into their own applications.

The API incorporates information from Kalshi, Polymarket and Manifold, using a standardised data structure.

Available functionality includes:

• Access to events and contracts.
• Contract prices and implied probabilities.
• Cross-platform market comparisons.
• Historical price series.
• Trading volume information.
• Thematic market classifications.

The company applies a standard limit of 100 requests per minute per API key, although alternative limits may be arranged for specific projects.

Access requires developers to request a key directly from Predictions.io.

Artificial Intelligence Identifies Equivalent Markets

A central challenge in prediction market comparisons involves determining whether contracts on different platforms refer to precisely the same outcome.

Predictions.io uses a process combining several technologies:

• Semantic comparison of market questions.
• Language models to assess potential equivalence.
• Human validation of identified matches.

This approach aims to reduce inaccurate comparisons between contracts that appear similar but contain different settlement conditions.

For example, two markets may concern the same election while using different deadlines or resolution criteria.

The validation process supports more accurate comparisons between platforms.

Standardised Data and Historical Analysis

The platform also addresses differences in the data formats used by prediction market providers.

Kalshi and Polymarket may express contract prices and trading volumes using different units.

Predictions.io converts this information into comparable structures, representing prices as probabilities and normalising selected financial metrics.

It also provides historical price data to help users understand how market expectations have evolved.

The API supports time-series queries covering one day, one week, one month and longer periods.

These features may be useful for researchers and developers examining prediction market behaviour.

An Information Platform, Not a Trading Venue

Predictions.io explicitly states that it does not operate as a trading exchange.

The company does not accept customer deposits, hold funds or execute transactions on users’ behalf.

Instead, its activities focus on collecting, organising and displaying information from different platforms.

Trading must take place directly on the relevant venues and remains subject to their regulatory conditions.

This distinction separates Predictions.io’s business model from operators such as Kalshi and Polymarket.

Next Steps and Impact

Predictions.io aims to strengthen its position as a tool for centralising information and facilitating prediction market comparisons.

With more than 7,700 tracked contracts, fee analysis tools, large-trader monitoring and developer API access, the platform provides several resources for understanding developments across the sector.

Its offering combines financial analysis, market intelligence and community features.

For the prediction markets industry, services of this kind demonstrate the emergence of a complementary ecosystem focused on improving data accessibility and transparency.

Predictions.io’s future development will depend on its ability to expand coverage, maintain data quality and introduce additional features for individual users and businesses.

Editó: @fonta