What it sells
Prediction markets platform.
Business model breakdown
Buyer: who owns the budget?
UnverifiedIndividual retail traders and API/market-maker developers open accounts and pay trading fees.
Workflow: what inputs become what output?
UnverifiedUsers fund an account, buy and sell event contracts on an exchange orderbook, place market or limit orders, and withdraw earnings.
Economics: what it saves and how it charges
Kalshi charges a transaction fee on the expected earnings of each contract, plus maker fees on some markets for resting orders that later execute; fees vary by market and are in a published fee schedule.
Distribution: how it reaches customers
Self-serve retail trading via web and app, plus a public API for developers.
Funding history and coverage
| Round date | Stage | Amount | Investors | Source |
|---|---|---|---|---|
| 2025-12-02 | Y Combinator Winter 2019 | $1B | Y Combinator | news.google.com |
| — | Y Combinator Winter 2019 | — | Y Combinator | ycombinator.com |
Profiles summarize public reporting and company websites. Business-model notes are MaxBC's reading of that material, not confirmed facts; unknowns are left blank rather than guessed. Updated 2026-10-12.