@adnan360
We can't fully answer this, but we've once taken down leaked, proprietary Cloudflare code from our platform, and their blog article only says which free components they use, not that all they develop and deploy is free.
About GitLab, the flagship instance is of course equipped with the EE version and some features are limited if you don't pay for it. The code it runs is still nonfree obviously, and IIRC some features do differ a little, but I don't have proof at hand currently.
@james @derek