I find it unbelievable that a software costing $1000 is the de facto standard. What is their moat, what exactly does it offer that it's impossible to replicate using existing libraries and APIs?
https://accessibility.blog.gov.uk/2016/11/01/results-of-the-...
my recollection from speaking to a blind acquaintance is that it is subsidized by some government agency for personal use, and businesses buying it for blind employees are just stuck with it as an ADA thing.
Of course, there's always software that costs absurd amounts of money for seemingly simple things; IDA comes to mind. I'm not excusing it, but that isn't to say that it doesn't exist.
Their moat is that the addressable market is too small for investors to bother investing in.