Relai, Bity and Bittr are NOT KYC-free. They link the purchased bitcoins to your identity via your bank IBANs. If the law will require, those companies will disclose all the trade data and identities.

Bisq and Robosats are much better options because your identity via your IBAN is disclosed only to your private and personal trade partner.

Azteco vouchers is a good option if purchased with CASH or other cash equivalents.