How to buy and deploy the RegexFlow Managed Application
- Open the Marketplace using this URL:
https://portal.azure.com/#view/Microsoft_Azure_Marketplace/MarketplaceOffersBlade
- Search for RegexFlow


- Click on Create and select RegexFlow S1

- Select Subscription and create a new Resource group, also fill in the Application Name.

After that click Next
- Agree to the terms and conditions and click on Create button

Relevant documentation from Microsoft: