99Exchange, also known as 99Exch, is an online platform bringing sports exchange markets, casino games, and fantasy contests together under one account. Users can register for an ID and access the service through a browser or mobile app. Sports coverage includes cricket, football, tennis, kabaddi, basketball, volleyball, hockey, and racing, with live and in-play markets for selected events. The platform describes exchange-style back and lay options alongside updates and betting markets.

Its entertainment offering includes live dealer tables, card games, roulette, slots, and other casino titles. Fantasy11 contests let users build teams, follow scores and leaderboard rankings, and enter tournaments with published prize pools. The site also lists welcome, refill, referral, and campaign promotions, subject to eligibility and offer terms. Account tools cover deposits, withdrawals, bet history, and password changes, while support pages address login, verification, bonuses, and payment issues. Payment options shown include UPI, Google Pay, PhonePe, bank transfers, and wallets, though availability may vary. The site advertises round-the-clock customer support and mobile access.