FormSubmits is described as 'SaaS service that provides developers, designers, and others in need an API entry point where they can submit their <form>'s. Additionally, the service does data verification and notify a user if something is wrong and he needs to do some corrections'. There are more than 10 alternatives to FormSubmits, not only websites but also apps for a variety of platforms, including SaaS, Viber, Facebook Messenger and Mac. The best alternative is Formspree.io, which is both free and Open Source. Other great sites and apps similar to FormSubmits are Getform (Freemium), Form2chat (Freemium), FormSubmit (Free) and Basin (Freemium).
Form backend for receiving submissions directly to the chat platforms: Telegram, Viber, Messenger, Slack, etc. Just copy your URL, and update your form's action attribute. No library, no CSS override, no iframe, nothing else is needed. Works with AJAX too.
Nobody likes writing server side code for web forms. Basin saves you development time so you can start collecting form submissions right away with no backend coding required. Works great with WordPress and static site generators like Jekyll, Middleman, and Hugo.
FormBucket gives you a hosted endpoints for your static site forms. Your markup, your CSS. We take care of the rest. You can redirect users to any URL, send autoresponder emails and add unlimited webhooks.
Webix Form Builder tool is intended to speed up the process of form creating. You just need to define the necessary fields as well as the desired form layout and then customize the auto generated form through the visual editor.