Great question. First you need to develop a value proposition canvas, establishing all the pains and gains of your target customers which your SaaS solution is addressing. The next step is to review each of these pains and gains using the 4D framework- Urgent, Undoable, Underserved and Unaddressed. This will help you the quantum of value you are delivering for that particular feature. The next step is to quantify the costs of offering each of these features. The cost review is only to understand and ensure that we are not underselling a feature. Next step is to price each feature and create bundles of membership / pricing. The basic bundle must address the core problem with a few add on features. As we charge higher and higher, more valuable features should be added to the bundle. For example, MS Word comes as a part of the office 365 bundle. But if you want to use specific add on for writing research paper, you need to pay extra. The next step is the price discovery to see if the customers are willing to pay what we are asking and adjust accordingly. Hope this helps.

I think you can use premium pricing strategy SaaS services based on subscription business model. Here, you have to analyze the needs and preferences of the business buyers. Based on the criteria of the target customer dynamic pricing can also be used.