Ask HN: What SaaS do you or your business use?

You can use something like https://stackshare.io/ or https://builtwith.com/ to discover what tools other businesses like yours are using. Is there something valuable in lists of SaaS websites from nonspecific HN users?

Quickbooks Online. The greatness of QB functionality (it's improved a lot since it's initial release), and the benefit of accountants knowing QB, and being able to access it online without sending over files.