Newbee. GitLab + Gitlab packages or GitLab + Nexus

Small team. Less than 25 developers. Looking for cost savings.

Researching alternatives for JFrog Artifactory… and maybe also Jenkins.
First I was thinking the free version of Nexus will do.

If using GitLab, does GitLab packages replace Artifactory/Nexus ?
If yes - would it be of any benefit using Nexus over GitLab packages?
If no - I assume Nexus would be a good way to go