FormStack Alternatives for Self-Hosted

Constant Contact Forms allows you to create forms that are clear, simple, and mobile-optimized for every device. Choose forms that automatically select the theme and style of your WordPress site. Customize data fields, so you can tailor the type of information you collect.

Contact Form Builder is a popular plugin used to create forms for WordPress-powered sites. With Contact Form Builder for WordPress it's simple to create feature rich forms that can capture contact information and other useful form data.

React Hook Form is a tiny form library without any dependencies. With the library it's simple to create React-based, performant, flexible and extensible forms with proper validation. React Hook Form is built with performance and DX in mind and embraces native form validation with simple integration to various UI libraries. Allowing developers to crete tiny size forms without dependancy, that follows HTML standards for validation. React Hook Form also provides resolvers support for third-party validation libraries like Yup, Zod, Superstruct, Joi or your custom sulotions.

Contact Form 7 is a WordPress plugin that can be used to create and manage multiple contact forms. The plugin allow you to customize your forms and connect them to email to send confirmation emails designed with flexible and simple markup. Contact Form 7 also provides CAPTCHA and spam filtering with Akismet.

Everest Forms is a WordPress plugin that makes it easy to create any kind of forms including contact forms, registration forms and surveys. With Everest Forms you can create forms and order fields through an intuetive interface that is beginner friendly. The Everest Forms plugin is lightweight and extendible, allowing you to create responsive, mobile firendly forms that are quick to load.

Ninja Forms is a freemium WordPress plugin that can be used to create any type of forms for WordPress-powered websites. The plugin integrates with many popular 3rd party services and can be used to collect registrations, email news letter signups, create surveys and much more. Ninja Forms provides a sleek UI that suits users of all technical level and simplifies the process of managing forms with WordPress dramatically.

A popular WordPress plugin used for building contact and registration forms for WordPress-powered websites. 

WP Fluent Forms is a WordPress plugin that allows you to create fluent forms for your WordPress-powered website. The plugin features a drag-and-drop form builder that can be used to create advanced forms in minutes. WP Fluent Forms is used by thousands of sites to create contact forms, surveys or capturing of other nessesary data.

Formik is a free and open-source library for building forms with React. The library improves on the otherwise verbose process of creating forms in React by minimizing the need for repetition and eliminating the cumbersome process of keeping track of values, errors, visited fields and orchestrating validation and error handling.

With WPForms you can create forms for WordPress with ease. WPForms is a WordPress form builder that provides 100% drag & drop functionalities, which means that no technical skills are required to setup forms for your WordPress-powered site. WPForms has been named one of the best WordPress form plugin by WordPress authority sites like WPBeginner, ElegantThemes, StudioPress, Astra Theme, OceanWP, and ThemeIsle.