It's not just lower subscription software pricing.
It's also faster time to market, because they're able to field entire teams of engineers to deliver what your tiny team is working on much faster. And they can do a lot more content marketing and advertisement that you've no time or budget to get done.
And then when they run out of money they post a blog post on a Friday morning to announce that you need to get your data out of their system by the end of the day. (Edit: in this case 2 months.)
On an off topic note, your site's FAQ says:
> So is this a one-man operation?
> Yes, for the moment it is. Which is actually a good thing, if you're concerned about viability. This means that there are no investors, no burn rate to speak of, no need to shut the company down because the money ran out. It is a mature, long-term project.
FYI my own concern as a buyer would be what happens if you get hit by a bus. You really need to get some kind of partner, or an employee the moment you can afford one.