Every review on this page follows the same process: we score the platform across 9 weighted categories — regulation, fees, market selection, liquidity, user experience, withdrawals, deposits, tax tools, and support — using our published methodology. Public fee schedules, CFTC registration records, court filings, and hundreds of user reviews feed each score. Platforms can’t pay for placement, and the rubric is public so you can check our work.
Scores are updated when platforms change materially — each review carries a “Last updated” line and a changelog when a score moves.
All Platform Reviews, Ranked by Score
| Platform | Score | One-line verdict |
|---|---|---|
| Kalshi | 7.4 | Best overall: widest regulated markets, strongest track record; slow withdrawals |
| Polymarket | 7.1 | Best fees and liquidity; US platform now open to all iOS users |
| OG | 6.7 | Crypto.com’s exchange: easy funding and parlays; no limit orders |
| ProphetX | 6.7 | Sports exchange with back/lay trading; fees only on winnings |
| FanDuel Predicts | 6.4 | Easiest mainstream on-ramp; pricier fees, mobile-only |
| Underdog Predict | 6.3 | Event contracts inside the Underdog fantasy app; 27 states |
| Fanatics Markets | 6.2 | Broad categories and FanCash rewards; thin liquidity, bot-only support |
| Novig | 6.8 | Zero commission and instant payouts on a CFTC-regulated exchange since August 2026 |
| ADI Predictstreet | Not rated | FIFA’s official World Cup market; US access via Fanatics — profiled, not scored |
Head-to-Head Comparisons
If you’ve narrowed it to two platforms, the head-to-head pages score them category by category:
- Kalshi vs Polymarket — the top two, and a much closer fight since Polymarket US opened
- Kalshi vs FanDuel Predicts — depth versus ease of entry
For the full field in one place, see Best Prediction Market Platforms, updated July 2026 with all nine platforms.
How These Reviews Work
Weighted scoring. Regulatory safety counts 20% — if your money isn’t protected, nothing else matters. Fees, market selection, and liquidity count 15% each; UX and withdrawals 10%; deposits, tax tools, and support 5% each. The methodology page publishes every rubric.
Primary sources. Official fee schedules, CFTC registration records and filings, court documents, and app-store review analysis — cited in each review. When a fact can’t be verified, we say so rather than print a guess; that’s why ADI Predictstreet is profiled but not scored.
Independence. Some links earn us commissions. Rankings follow scores, scores follow the rubric, and several reviewed platforms have no affiliate relationship with us at all. Details in our affiliate disclosure and editorial policy.
New to all of this? Start with What Are Prediction Markets? — then come back and pick a platform.
Common Questions About Prediction Market Platforms
Do people actually make money on prediction markets?
Some do — prediction markets are zero-sum minus fees, so every winning trade has a losing counterparty.
Skilled traders profit from pricing errors; most casual users should expect modest results. What the
platforms verifiably provide is fair settlement of real-money contracts, which is what our reviews assess.
Which prediction market is the most accurate?
No study crowns one platform. Market prices in aggregate are well-calibrated — 70% favorites win about 70%
of the time — and platforms rarely diverge much because traders arbitrage the gaps. Where Kalshi and
Polymarket do disagree, our odds pages show it side by side.
Can you invest in prediction market companies?
Not directly — Kalshi, Polymarket, and the other platforms reviewed here are private companies, so there
are no prediction market stocks to buy yet. Public-market exposure is limited to parent companies of some
products (Flutter for FanDuel Predicts, CME Group, DraftKings). A full guide to the companies behind the
platforms is on our roadmap.
Examples and full list
The complete list of prediction markets we review: Kalshi, Polymarket, OG, ProphetX, FanDuel Predicts,
Underdog Predict, Fanatics Markets, Novig, and ADI Predictstreet — all linked in the table above, all scored
in the rankings.