Your domain was registered a month ago, which makes you so new. Which means your site is not reputed, and trusting your site is a great risk.
Giving a seed phrase to someone is not actually advisable but the hash generated from john the ripper/bitcoin2john.py
Sample this
7ffd075472fa3b9fc2fb101c2266$16$33f0faf0fe3dcb93$102776$96$5fc3496ba1440f3315bee
5f3bf41725d8e4b90490bf7a30e08e723d26885a2fc8d664f56f6dd8882f8748e76bff6ac85$130$
04f337019182692c8aead3704b3ddac1deca637f44d26a78367513c56b0c8ef8bd5b355f91f39f7 c
9eeaea4700695391f0be0ec8e3d5c929061b0ad96a00fa43b6
You can send it to anyone without sending the wallet file or incomplete seed phrase.
If they decrypt this hash then they are going to send only the password of your wallet.dat.
There is a well-known recovery service which is already gathered trust from some users here on the forum which is walletrecoveryservices.com
So for now, it's not safe to use his service for Mnemonic seed but only for forgot wallet.dat password.