> I can’t think of a single internal tool at Amazon that is better than a commercial counterpart.
I haven't worked at Amazon in 6 years, but when I was last there, these tools were leaps-and-bounds above publicly-available equivalents:
* Pipelines (CI/CD tool. Still better than all alternatives IMO, including the AWS offering for some reason)
* Igraph (Amazingly good, wipes the floor with Grafana which I have used since)
* TT (ticket tracker)
* SIM? the new issue-management system they added to replace Jira. Soooo much better than Jira. But it was pretty new when I left so I don't know what it has become.