Polymarket and Kalshi are both prediction markets: each shows market-implied probabilities for real-world events, derived from what traders are willing to pay. If you just want to know “what is the market pricing?”, both answer that question.
The two platforms differ in meaningful ways — their structure, the types of markets they list, their resolution rules, and where and how they’re available. Kalshi operates as a US-regulated exchange with event contracts; Polymarket runs as a separate prediction market platform with its own catalog and mechanics. Those differences affect which markets exist, how they settle, and who can access them.
DePredict pulls both feeds and normalizes them into one format, but it keeps them clearly labeled as separate sources. You can filter by platform to view each on its own. Normalization makes them easy to scan side by side — it does not merge them into a single combined market.
Two markets on different platforms may look like the same question but resolve on different rules, dates, or definitions. A 60% on one platform and a 55% on the other might reflect genuinely different contracts rather than a mispricing. Treat cross-platform comparisons as directional unless you’ve checked that the underlying rules actually match.
For prices, rules, and resolution, the originating platforms — Polymarket and Kalshi — remain authoritative. DePredict is informational only. See Sources for how the data is handled.