Open-source Formstack alternatives

HeyForm is an open-source form builder aimed at small businesses and teams that need to collect information or feedback. It focuses on conversational forms, which cover surveys, quizzes and polls, and lets people build them without writing code.

Forms can use many input types, from text, email and phone number fields to picture choices, date pickers and file uploads. Conditional logic and URL redirects make forms adapt to answers. Integrations include webhooks, analytics and marketing tools, plus Zapier and Make.com. Themes control fonts, colors and backgrounds, and custom CSS allows deeper branding. Analytics report drop-off and completion rates, and results can be exported to CSV.

HeyForm is written in TypeScript and released under the AGPL-3.0 licence. The maintainers recommend their official hosted service for reliability, automatic backups and no maintenance, and the open-source code remains available for teams that prefer to run it themselves.

Form.io is a combined form and API platform for building data management applications. This repository is the core form and API engine behind the Form.io service. It lets you design forms with a drag-and-drop builder and then embed them in your applications, and it generates the API that stores the submissions. It runs on Node.js and is released under the OSL-3.0 license.

Forms can be rendered in Angular, React, Vue, or plain JavaScript applications, and the platform was designed for serverless architectures. The official documentation, release information, and guides are at help.form.io, and a walkthrough video shows how to build an application on the open-source platform.

A commercial hosted service is run by the vendor on form.io, while the open-source engine can be self-hosted. Form.io suits teams that need configurable, form-driven applications such as intake, workflows, and internal data collection, and want to avoid hand-coding each form and API endpoint.