Gravity Forms works off WordPress, and if you have WordPress installed anywhere on your domain, you can embed one of their forms in a static area of your site. It integrates with Zapier, which makes the possibilities endless for what you do with the form entries. I use it at Vacord Screen Printing to take the information from quote requests and put it as a card in our sales funnel Trello board. You can write that data to a Google Doc or whatever you need. It’s worth the Developer license so that you can use it all your sites.