Sitefinity has a built-in Form module with various form controls which can be used to gather input from the site visitors. Drag and drop the form controls on the form to make it appear as desired.
The already created form can then be displayed using the Form widget and it can be dropped on pages and page templates.
For more information see Sitefinity Documentation, Forms https://www.progress.com/documentation/sitefinity-cms/forms
Sitefinity also offers a Reviews widget. It is part of the Comments module and allows adding user reviews on all commentable types (pages, content items, media items, e-commerce products). It can be customized with the help of the following resources:
- Sitefinity Documentation, Change The Star Symbol of the Reviews Widget https://www.progress.com/documentation/sitefinity-cms/change-star-symbol-in-reviews-widget-mvc
- Sitefinity Github Feather Widgets - containing the source code of the widget https://github.com/Sitefinity/feather-widgets/tree/master/Telerik.Sitefinity.Frontend.Comments
For more information see Sitefinity Documentation, Comment and Reviews Widgets https://www.progress.com/documentation/sitefinity-cms/comments-and-reviews-widgets-mvc#reviews-widget