Grams itself is a brand on the Darknet so I believe not much needs to be said about it. Grams Helix is one of its subsidiaries and is one of the most reputed and widely used crypto mixer services out there, it’s simple, modern, and definitely trustworthy. Grams supports only Bitcoins for now. It needs 2 confirmations before it cleans and sends you your coins. It obviously supports time-delay, but it’s automatically set to “2 hours” for some reasons. It also supports “Random transactions” for the deposit, the deposit address changes after each transaction and allows you to send more than 1 transactions to Grams Helix instead of sending in all your coins in a single go. The same is also supported for the “output addresses” (where you receive coins) and you can input as many as 5 different BTC addresses where your coins are sent after cleaning them. The coin-deposit address is valid for 8 hours, and any transaction not done within these 8 hours won’t be received by the platform.

Being one of the earliest crypto coin tumblers, bitcoin mixer continues to be a easy-to-use and functional crypto coin mixer. There is a possibility to have two accounts, with and without registration. The difference is that the one without registration is less controllable by a user.

The mixing process can be performed and the transaction fee is charged randomly from 1% to 3% which makes the transaction more anonymous. Also, if a user deposits more than 10 BTC in a week, the mixing service reduces the fee by half. With a time-delay feature the transaction can be delayed up to 24 hours. A Bitcoin holder should worry security leak as there is a 2-factor authentication when a sender becomes a holder of a PGP key with password. However, this mixing platform does not have a Letter of Guarantee which makes it challenging to address this tumbler in case of scams.