Your Product-Business 'stack'

We're prepping to launch a start-up. Would love to hear what everyone's "business" stack looks like. For example, I'm sure we're all using Laravel + Forge/DO/? + Stripe/? for the app stack, but what about beyond that... customer support tools? online banking? analytics? accounting? and so on. Thanks, it would save a huge amount of legwork for us and whoever sees this thread. :)