Prove Everything.
Reveal Nothing.
A cyber-minimal blackjack floor where every outcome can be verified on-chain.
21z
Prove Everything. Reveal Nothing.
Provably Fair
Every game outcome is verifiable. Seeds are committed on-chain before you bet, and you can verify any hand yourself.
True Privacy
No accounts required. Play with Zcash shielded transactions. We don't know who you are, and we don't want to.
Instant Payouts
Withdrawals are processed automatically. Your ZEC is sent directly to your wallet within minutes.
Transparent House Edge
We believe in full transparency. Here are our house edges:
~0.5% or lower
Blackjack (Basic Strategy)
0.46%
Jacks or Better (9/6)
0.76%
Deuces Wild (Full Pay)
4.5%
Perfect Pairs Side Bet
7.4%
Insurance Bet
Blackjack edge varies by decisions. Side bets have materially higher edge than the main hand.