If you are looking to launched a productized service like wpcurve.com. There are currently no plugins that support this fully.
I am cobbler together a few plugin and duct tape one for proof of concept.
The Required Plugins:
Responsive Pricing Table
WP Full Stripe Free
Contact Form 7
The Main Setup
First Setup your 3 tier offer using Responsive Pricing Table
Create all the payment type in WP Full Stripe Free.
In each payment type create a Thank You page with in contact from 7. Here you collect all the necessary information from your customer e.g. email address, web URL.
The duct tape Part
Under the 3-tier offer that you have setup in Responsive Pricing Table. On each button link, link to the payment type you have created.
On the payment form that you created in WP Full Stripe Free, add the page under “Redirect to” select the correct thank you page.
Basically we are just creating 1 offer, 1 payment and 1 contact from for each tier that we offer.
First recurring payment is not setup, this can be easily fix by upgrading WP Full Stripe Free to Pro, which include recurring payment. However, I would like to allow clients to create an account, purchase a subscription, change subscription type of cancel subscription. How about support/ job tickets tracking, allow clients to upload files such as backups. Ideally I could create reports and send notifications for clients, admin and maybe staffs.
Would you be interested in a plugin that have all these features?