A two-person startup already uses twenty-eight other tools
I was curious way the author used Slack for 2 people until I saw their SaaS is a plugin for Slack.
As I mentioned in my other comments, startups selling a SaaS spend so much time writing copies and doing sales pitch of how their SaaS product is a must-have that they start to believe that also others SaaS are must-have.SaaS selling to SaaS might turn into a Ponzi piramid scheme if left unchecked.