Flat vs per seat pricing

Hi,

I have a question on pricing. I'm building a B2B SaaS, and I've been charging my users $99/mo. Previously I charged $49/mo. All other similar products in my space are usually charging per seat or have a combination of both.

Eventually, I'd like to switch to the per-seat pricing model. However, I think the offering I have at the moment does not provide enough value to my customers to charge per seat. Thus, I'm focusing on creating more value first and then planning to look into the price changes.

What is your take on flat vs per-seat pricing? Have you successfully switched from one to another? Do you have any numbers to share (e.g. increased conversions?)