Formstack Workflows supports the ability to export a snippet to embed an iframe onto your webpages. The iframe loads and hosts your workflow.
The first thing you need to do get this link for your workflow is click on Share Workflow on the top right corner.
The second step is to click on the Get embed code button on the bottom left.
A new page will pop up that will contain the code that you can copy and paste into the HTML on your website and then you're all set. An embedded workflow will load the first forms based step and then any other inherited step.
Please note - Workflows with in-session Sign steps after initial or inherited form step do not support embedded workflows. This is shown to the builder user with a message and the copy snippet link disabled.