There are many form plugins for WordPress. There are very good and professional ones, but there are also form plugins that are not so professional in our opinion. After a lot of tests we decided to use Gravity Forms. Gravity forms is constantly being developed further and therefore has many extension possibilities.
With Gravity Forms it is possible to create posts, for example. This way website visitors can enter posts. It is also possible to sell products through a form. Gravity also allows transferring the data to an email service like ActiveCampaign or Aweber.
You can also use Gravity Forms to transfer customer data to your CRM. For example to Hupspot, Capsule or to Agile CRM. And with the Zapier interface you can connect 2500 services to your Gravity Form.