Ask HN: How do I price my SaaS?

I am about to launch my Saas and is looking for advice on how to price it. It's a service that automate the work for companies doing inspections on certain machines. There are at most say 150 potential customers in my country. Customers have 1-100 employees (I.E. users) (average 15) and the ambition is that this service will improve their productivity with 10-15%. I am considering user based pricing, since I have taken some measurement to prevent users from sharing accounts. It also adds a lot of value for them to use personal accounts. However, the internet appears to be more in favour of tiered pricing. How should I reason here?