Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Robinhood Prediction Markets) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
50% | 50% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Candidate U | 50% |
| Candidate V | 50% |
| Candidate W | 50% |
| Candidate X | 50% |
| Candidate Y | 50% |
| Candidate Z | 50% |
| Candidate AA | 50% |
| Candidate AB | 50% |
| Candidate AC | 50% |
| Candidate AD | 50% |
| Candidate AE | 50% |
| Candidate AF | 50% |
| Candidate AG | 50% |
| Candidate AH | 50% |
| Candidate AI | 50% |
| Candidate AJ | 50% |
| Candidate AK | 50% |
| Candidate AL | 50% |
| Candidate AM | 50% |
| Candidate AN | 50% |
| Candidate AO | 50% |
| Candidate AP | 50% |
| Candidate AQ | 50% |
| Candidate AR | 50% |
| Candidate AS | 50% |
| Candidate AT | 50% |
| Candidate AU | 50% |
| Candidate AV | 50% |
| Candidate AW | 50% |
| Candidate AX | 50% |
| Candidate AY | 50% |
| Candidate AZ | 50% |
| Candidate BA | 50% |
| Candidate BB | 50% |
| Candidate BC | 50% |
| Candidate BD | 50% |
| Candidate BE | 50% |
| Candidate BF | 50% |
| Candidate BG | 50% |
| Candidate BH | 50% |
| Candidate BI | 50% |
| Candidate BJ | 50% |
| Candidate BK | 50% |
| Candidate BL | 50% |
| Candidate BM | 50% |
| Candidate BN | 50% |
| Candidate BO | 50% |
| Candidate BP | 50% |
| Candidate BQ | 50% |
| Candidate BR | 50% |
| Candidate BS | 50% |
| Candidate BT | 50% |
| Candidate BU | 50% |
| Candidate BV | 50% |
| Candidate BW | 50% |
| Candidate BX | 50% |
| Candidate BY | 50% |
| Candidate BZ | 50% |
| Candidate CA | 50% |
| Candidate CB | 50% |
| Candidate CC | 50% |
| Candidate CD | 50% |
| Candidate CE | 50% |
| Candidate CF | 50% |
| Candidate CG | 50% |
| Candidate CH | 50% |
| Candidate CI | 50% |
| Other | 50% |
| Scott Jennings | 20% |
| Kush Desai | 17% |
| Alina Habba | 16% |
| Kari Lake | 14% |
| Lara Trump | 13% |
| Laura Loomer | 13% |
| Anna Kelly | 12% |
| Lauren Bis | 11% |
| Tricia McLaughlin | 11% |
| Monica Crowley | 11% |
| Kaelan Dorr | 10% |
| Harrison Fields | 10% |
| Spencer Pratt | 10% |
| Beni Rae Harmony | 9% |
| Kayleigh McEnany | 7% |
| Taylor Rogers | 5% |
| Katie Pavlich | 5% |
| Hogan Gidley | 5% |
| Natalie Harp | 5% |
| Katie Miller | 5% |
| Pat Adams | 4% |
| Liz Huston | 4% |
| Ari Fleischer | 4% |
| Matthew Boyle | 4% |
| Elizabeth Pipko | 4% |
| Margo Martin | 3% |
| Rachel Campos-Duffy | 3% |
| Maria Bartiromo | 3% |
| Karoline Leavitt | 3% |
| Jake Paul | 2% |
| Steven Cheung | 1% |
Market context
Traders on decentralised prediction markets give 50% probability to next press secretary?. This market will resolve according to the next individual who the White House announces has been picked to be the White House Press Secretary who replaces Katie Zacharia by December 31, 2027, 11:59 PM…
Methodology
This page compares Next Press Secretary? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.
Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.
FAQ
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- What does Polymarket cost vs Kalshi?
- Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.
- Is Betfair a Polymarket alternative?
- Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
- What about Smarkets as an alternative?
- Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.
- Are all these platforms regulated?
- No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
%22%2F%3E%3Cpath%20d%3D%22M%206%2066%20A%2026%2026%200%200%201%2058%2066%22%20fill%3D%22%23E6B98D%22%20opacity%3D%220.9%22%2F%3E%3Ccircle%20cx%3D%2232%22%20cy%3D%2226%22%20r%3D%2222%22%20fill%3D%22%23F5CBA7%22%2F%3E%3Crect%20x%3D%2210%22%20y%3D%224%22%20width%3D%2244%22%20height%3D%2214%22%20rx%3D%227%22%20fill%3D%22%2314b8a6%22%20opacity%3D%220.9%22%2F%3E%3Crect%20x%3D%228%22%20%20y%3D%2218%22%20width%3D%228%22%20%20height%3D%2218%22%20rx%3D%224%22%20fill%3D%22%2314b8a6%22%20opacity%3D%220.7%22%2F%3E%3Crect%20x%3D%2248%22%20y%3D%2218%22%20width%3D%228%22%20%20height%3D%2218%22%20rx%3D%224%22%20fill%3D%22%2314b8a6%22%20opacity%3D%220.7%22%2F%3E%3C%2Fsvg%3E){kind=small}
and%22%2F%3E%3Cpath%20d%3D%22M%206%2066%20A%2026%2026%200%200%201%2058%2066%22%20fill%3D%22%23E6B98D%22%20opacity%3D%220.9%22%2F%3E%3Ccircle%20cx%3D%2232%22%20cy%3D%2226%22%20r%3D%2222%22%20fill%3D%22%23F5CBA7%22%2F%3E%3Cpath%20d%3D%22M%2010%2026%20A%2022%2028%200%200%201%2054%2026%22%20fill%3D%22%2314b8a6%22%20opacity%3D%220.9%22%2F%3E%3C%2Fsvg%3E){kind=small}
Trade Next Press Secretary? on Robinhood Prediction Markets
Live order book, 0% fees, USDC settlement in seconds.
Open live market →