Category

Review

Articles, reviews, and how-tos in the Review category on the OpenMarkets blog.

Review

ProphetX Review: Sports Prediction Market

ProphetX is America's first CFTC-regulated sports prediction exchange: peer-to-peer pricing, commission on winnings only, back-and-lay, and no limits on sharp bettors. Our full review.

By Greg Kajewski · Jun 14, 2026 · 9 min read
Review

BetOpenly Review: True Peer-to-Peer Betting

BetOpenly is a true peer-to-peer sportsbook with 1% juice and no limits on winners. We review the product, the math, and where it fits in a serious bettor's stack.

By Greg Kajewski · Jun 3, 2026 · 8 min read
Review

Polymarket Review 2026: World’s Top Prediction Market

On-chain prediction market with deep liquidity, low fees and CFTC-regulated US access, but onboarding and oracle disputes persist.

By Greg Kajewski · May 29, 2026 · 10 min read
Review

Kalshi Review 2026 Prediction Market: Trade on Anything

CFTC-regulated prediction market review: markets, fees, APY, liquidity, risks, and trading tips.

By Greg Kajewski · May 26, 2026 · 16 min read