I think 0-house-edge game exists only in PvP(Player vs  Player) gamble.

When you play with PvH model,like dice site, there is no possibility to have 0% house edge. because , the site profits from your lose. if they set the house edge to 0%. the chance to win from you is 50%.

In other word the site(PvP) makes profit from other ways ( adv, or charge fees).

Some sport site is PvP ,and 0 house edge , but they charge fees, some site charges as high as 5%.  so it is no good.

Some small site are 0% house edge and also 0% fee......but but but but they are scammer

I know a site that is real 0 house edge PvP, and really 0% fee ,even trans fee.

If you want you can ask me by PM. I can't post the site name here , or it will be like adv for the site