OpenMarkets
The OpenMarkets Blog
Insights on prediction markets, the operator network, and the infrastructure powering them.
NFL Week 1 2026 Preview: Key Matchups and Odds Across Every Venue
The full 2026 NFL Week 1 board priced across every prediction market venue. A two-way moneyline costs 100.5% to 101.3% here against 104.8% at a sportsbook, with $158.7M resting behind it.
NL MVP 2026: Where to Get the Best Price on Prediction Markets
Crow-Armstrong and Ohtani are priced within a cent of each other on Kalshi and Polymarket. We walked both order books to find where the position is actually cheapest net of fees.
Polymarket US 2026 Review: Trade on sports, politics, and more
Polymarket US is live: a CFTC-regulated exchange for sports, politics, economics and weather, with no vig, zero maker fees and ICE and MLB behind it. Our full 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.
What is Paper Trading in Prediction Markets?
Paper trading lets you practice prediction market trades at live prices with no real money. Learn how it works and how to track the strategies that win.
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.
Sportsbook vs. Prediction Market: Key Differences Explained
Compare sportsbooks and prediction markets by counterparty, fees, exit options, regulation, and tax treatment.
Top 5 Benefits of Multi-Platform Sports Betting APIs
Multi-platform sports betting APIs close the gap between fragmented venues. Five concrete benefits for developers and operators in 2026.
7 Features to Look for in a Betting Infrastructure Platform
Choose a betting platform with scalability, sub-100ms data, flexible markets, secure APIs, operator analytics, and customizable UX.
What is Whale Trading on Prediction Markets?
How large traders move prediction-market prices, drain liquidity, signal info or manipulate, and how retail traders can spot and respond.
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.
Best Tools for Cross-Platform Betting Automation in 2026
Compare top platforms that aggregate odds, find arbitrage, and enable unified execution and automation across betting venues.