Please take this as constructive: I pay for your system for a team of about 10 people. It works and it's been useful to us - but as soon as I get some free time I'm very likely going to roll my own, because I slightly resent the $5 per user per month price-tag for such a simple service; I think it's pretty expensive for the features compared to other single-purpose cloud tools. I'm not asking for more features, becau…
Your time must not be worth very much if you're really considering rolling your own. How long will it take you? A day? You might think so, but no. A weekend? Possibly, but you won't handle all of the corner cases. A week? Getting closer. How much would you pay yourself for a week of work?
It took me about a week, so that's fair, but that's to rebuild not just the core functionality, but also the multi-tenant SaaS part.
I have a 50 person team. So, I would've paid $250/mo, or $3k/year. So, I really invested $2k to develop my own version, which also has the potential to make money if people prefer paying $15 for a team of unlimited users.
So, no, I didn't find that a waste of time. Plus, I learned some new things along the way, and can fine tune the app as I see fit.
This is the risk of building a business around simple, contained functionality. They're easy to clone, and you better get the execution and pricing right, and figure out how to expand on the concept, or you'll be commoditized quickly.