Customer service portal and C4C / out of the box?

Dear experts,

I am a bit confused on what HCP can offer.

I am used to project on CRM on premise and I am moving to C4C (Cloud for Customer ; the Service part) .

Our usage of C4C is simple with ticket service processes (operator will open a service ticket concerning a customer issue and will resolve it through different internal processes).

In addition to C4C, we need to develop a customer portal that will give a customer access to its tickets.

Indeed, the portal would have several features like creating new ticket, see its ticket statuts and send information.

My question is : In HCP, is there an out-of the box portal that already exists and would be interfaced with C4C? I mean a portal that is already developped and accessible with features like ticket creation or update? And all modification will be updated to C4C system?

Or customer portal needs to be developed from scratch in the HCP?

Thanks a lot for your help,

Regards,

Anaïs