1) Tell us a bit about your product and what value it creates for your potential customers.
2) Read what's already been written on SaaS pricing (e.g. https://www.cobloom.com/blog/saas-pricing-models) and let us know your thoughts on how particular models seem to fit your case.
3) Tell us what you're going to do, and why.
Re: #3, people love to tell you why what you're doing (or going to do) is wrong: https://meta.wikimedia.org/wiki/Cunningham%27s_Law