trello (free) + github (3 free private repos or $9 per user per month for an org) Gitlab works, and is decent, but only in certain circumstances. Pay for SaaS

trello (free) + github (3 free private repos or $9 per user per month for an org) Gitlab works, and is decent, but only in certain circumstances. Pay for SaaS products wherever you can and makes sense. Only build/host your own things that deliver you business value.