How it works
Regex101 is offered as a licensed enterprise product. In order to use it, you need to purchase a license, which is valid for a fixed period of time. During this period, the application, and future updates of it, will be available to you. When the license expires, the software will shut down and cease to function, until you renew your license.
The technical aspect
The software is packaged in docker containers, which you pull through a private registry you are given access to. From there, you just need to configure a few environment parameters, and you should be set to go.
After purchasing a license, you will receive detailed instructions with how to get started.
If you're curious to learn more, you can continue reading here.
Subscription
The subscription is made available through Stripe. You can always see, change or cancel your subscription through the customer portal. A unique link will be sent to you in an email after completing a purchase where you can access the customer portal.