You can use an iframe to place a subscription box to your Avoori Newsletters inside any website.
Avoori Newsletters free plan is included with every Business Website and Online Store plans and offers up to 15,000 emails per month, unlimited subscribers, limited to 7,200 emails per day. See more information about the free plan and how to increase the sending limits here.
To get the code for the iframe, first create a new layout, edit the layout with the Page Designer and add a newsletter email opt-in module inside. Once you saved the settings, navigate back to the admin section of your website, go to the layouts section, locate your layout and copy the iframe code which will allow you to display the subscription box inside any website you place it on.
If you need to place a subscription box inside your website, you may refer to this article: Collecting Subscribers with Avoori Newsletters on Your Avoori Website.