https://www.Chain-Bet.com has 0% house edge.
Is the owner of this site is still sane?, because this is really insane having a gambling site that has 0% house edge, lol, just saying. I bet that this person is a very rich one because he is just giving his money by setting his gambling site to 0% house edge so whoever plays on his gambling site would never lose, the players would just keep on winning until they are tired of winning.
0% house edge does not guarantee a win. But it increases your chance to win.
To be brief, 1% more chance to win than a site with 1% house edge.
Well technically 0% edge means that the outcome as bets go to infinity means that either side is favored. That is based on the assumption that all bets are taken with the same strategy and done by bots or computers.
However humans have emotions and even with 0% house edge they can still lose. Say someone has lost 5-6 times in a row, the strategy might suggest to keep on betting, the human might take their losses and leave while the bot would keep betting and might get breakeven or in a positive balance.