GitLab

Safe to use as SaaS. Easy to build even on-premises, but the SaaS version can be used with peace of mind thanks to strong security measures. Obtaining ISO/IEC 27001: 2013 certification, can be used with greater peace of mind, making it easier to approve the internal introduction request. If you are confident in the security, you can operate free of charge by creating a local server. When creating the request form to send to the internal IT department when submitting the SaaS version, there were some unclear points about security management in GitLab, but GitLab support took the trouble to conduct a remote meeting and was able to resolve all doubts.

I think it's good that you can use it in basically the same way as GitHub, and that you can manage it by making use of your existing knowledge. Also, I think it's nice that GitLab has unique features that are easier to use, such as a feature that changes the display of the file icon for each file extension.

I was using GitLab for a year and a half and I have to admit that it was the best git management tool I ever used. Everything that is needed by the user is already built-in. CI/CD is handled brilliantly and can be quickly set up without a lot of training before. The whole app is intuitive and easy to use (especially if a user has some experience with similar apps). Documentation is big and contains not only facts but also examples, which allows saving a lot of time during debugging or introducing new functionalities. GitLab is well known around the internet, so community support is also good. If a user has some problem, it is probably resolved inside documentation or in one of the web forums. The flexibility of GitLab is huge. It can be easily adjusted to a company's needs without any problems. Processes may be set up differently in various projects and integration between them is almost seamless.
On the other hand, the price per user is quite high, especially on better plans, so GitLab can quickly become expensive in bigger companies. The second disadvantage is that some less-known tools cannot be integrated with the app. However, the list is being extended and devs are listening to a community so the more some app integration is needed, the more likely it is.
In my opinion, GitLab is the best git management tool I ever used - particularly because of CI/CD. If you can afford the price, it is worth it!

Satisfactory! Started out on the free plan, and as the project grew and I needed more space and developers on it we upgraded and even got more access to more tools to better streamline our DevOps processes and overall project development.