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For research teams and builders
The research layer for prediction markets.
Explore Kalshi, Polymarket and Limitless in one place. Follow the markets that matter, compare related contracts, and bring the context into your research.
Working on your own? Follow the questions you choose on a free Explorer account. Pro adds briefings on the topics you configure; paid plans are not open for self-service purchase yet. Compare plans.
Will the Fed cut rates at its next meeting?
Three candidate contracts grouped for review. Wording and settlement still need checking.
A difference between quotes is a prompt to read the contracts, not a trade. It excludes fees, available size, and any difference in how each venue words and settles the question.
Covering Kalshi · Polymarket · Limitless
Venue names are used for identification only. Riddle is not affiliated with these venues.
Product
One place to follow the questions you care about.
Prediction markets are spread across venues that word the same question differently. Riddle brings them onto one screen so the comparison work starts from something organised.
Discovery across three venues
Search Kalshi, Polymarket and Limitless from one place and see candidate contracts on the same question side by side, with the venue and the contract identifier attached.
Watchlists
Keep the questions you actually follow in one list instead of a folder of venue tabs, and come back to the same set of contracts each morning.
Market history where available
Where Riddle has recorded them, view the observations we hold for a contract over time, as a partial history rather than a complete venue record, so a move can be read in context rather than as a single snapshot.
Research briefings
Written summaries of what changed across the markets you follow, with the contracts named so you can go and read the source wording yourself.
Workflow
From market discovery to a clearer view.
Find the question
Start from a topic rather than a venue. Riddle surfaces the contracts that appear to address the same question across the three venues we cover.
Read the contracts
Two similar headlines can settle on different sources and different dates. Riddle puts the contract details next to each other so the differences are visible before you draw a conclusion.
Carry the context into your work
Save the set, follow it over time, and take the summary into the note, model or desk conversation it was meant for.
For teams
Three jobs Riddle is built for.
Research analysts
Track how market-implied expectations on a policy, election or macro release move, and keep a record of which contract you were reading.
- Topic-first discovery
- Watchlists per theme
- Briefings you can quote from
Trading teams
Riddle is research tooling, not an execution venue. Use it to scan a wider set of venues than one screen and to see where quotes disagree and why they might.
- Cross-venue comparison
- Contract and settlement notes
- No orders, no routing, no execution
Developers
Pull prediction market data into your own product or model. Create a development key yourself in the app and read the published reference before you write a line of code.
- Candidate market discovery
- Contract metadata and observation history
- Self-service development keys
Evaluating Riddle for a team?
Tell us the recurring question your team works on and we will talk through how Riddle would fit, what it covers today, and what it does not. Scope and timing are agreed before anything starts.
Talk to usThis opens your email client with a draft you can edit before sending.
Research
Guides for working with prediction market data.
Practical writing on how to read contracts, compare venues and plan an integration. Free to read, no account needed.
How to run prediction market research
A repeatable workflow from question to recorded conclusion.
Read the guideComparing Kalshi and Polymarket contracts
A checklist for wording, settlement source, dates and fees.
Read the guidePlanning a prediction market API integration
Identifiers, price conventions, resolution fields and storage.
Read the guideBuild with Riddle
Contract research and a documented API.
Two tools sit alongside the app for people who work at contract level: a research workspace for comparing exact contracts, and a v1 API for pulling the same data into your own work.
Contract research workspace
Compare two exactly addressed contracts side by side: the stored resolution rules, typed yes and no quotes with the size shown against them, and the source and receipt timestamps. Work through conditional binary settlement scenarios with your own fee and slippage figures, then export the working as JSON or CSV so the result can be reproduced.
- Exact platform and market identifiers, no title matching
- Stored snapshots, not a live order book
- Fees and slippage are the per-leg totals you enter
Developer API
Search candidate markets across Kalshi, Polymarket and Limitless, read contract metadata, and pull the observations Riddle has recorded over time. Create, rotate and revoke your own development keys in the app, and check the reference before you build.
- Self-service development keys in the app
- Published endpoint reference and examples
- Historical points are Riddle observations, not a full venue archive
Start with the markets you already follow.
Create an account or sign in to explore Riddle, or write to us if you would rather talk it through first.
Team or integration enquiry
Leave your email and we will get back to you about team use or an integration. To start using Riddle now, sign in instead.
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