GitLab in a SaaS or self-hosted environment

Used the GitLab solution whithin many clients information systems for : - code management / code repository - Continuous Integration / Continuous Delivery I also installed GitLab as a self hosted service on-premise, on the cloud and also use the SaaS version
GitLab is used for both code management, PRs (or merge requests in GitLab), CICD and version management

We did not use gitlab security features, we did however integrate gitlab with other solutions such as sonarqube and secured the infrastructures on the technical level (ex. remove internet access on the project level, expose the service on a restricted internal network).
Note that you can deploy other security solutions to your code / pipelines to check for passwords

GitLab continuous integration solution is used whether in a self-hosted, on premise or SaaS version. Note that for new users on the SaaS version (starting around 3 years ago), GitLab no longer provides free runners since the feature was being abused by crypto miner. I myself still have free runners on the SaaS version since my account is old. On the self hosted version, you have to deploy specific runners (can be achieved with SaaS version as well). Along with gitlab web IDE, the Merge Requests UI and the CI logic it makes it accessible to get started with continous integration.