Knowledge management for organization (Confluence/Notion competitor) https://dokkument.com

Backend: Django + Django Rest Framework + Celery + Postgres

Frontend: Vanilla Js + prosemirror

Deployment: Manually on rented servers

Picked that because this is probably the fastest way to code for me, no bullshit. I know that if I add any new tech that will slow me down, because I'll have to learn and master it and that takes a lot of time.

I don't think that has any impact on my success at all. Customers don't care about the stack, the only thing that it impacts is development speed. And this is not a significant factor. The most important thing in Saas B2B is sales skills