Which dev portal vendor do you use at your company?

I am working on introducing a developer portal at my current company. Would like it to be able to use swagger, protobuf, and have some features regarding monetization and authentication that we would use in the future. I think the biggest selling point for me to use is that it's going to be an easy lift to start getting our documentation on there and it has some tantalizing features we could take advantage of in the future regarding monetization.