Open Source Form Builder
A form is the front door to your data, which means every response you collect inherits wherever the builder decided to store it - and the people filling it out have no idea their answers are passing through a third party's servers. The open source builders here let you design the same fields, logic, and even conversational flows while the submissions land in a database you run, so the personal data your respondents trust you with never has to live anywhere you don't control.
Formbricks
Open source experience data hub for in-app, website, link, and email surveys
Typebot
Fair Source chatbot builder for websites and apps, with visual flows, embeds, and real-time results
HeyForm
Open-source form builder for surveys, quizzes, polls, and conversational forms
ONLYOFFICE Docs
Collaborative online office suite for documents, spreadsheets, presentations, forms, PDFs, and diagrams
OpnForm
Open-source form builder for unlimited forms, submissions, and data you control
Form.io
Self-hosted form and API platform for building serverless data collection apps
Keila
Open source email newsletter tool for campaigns, sign-up forms, and self-hosted sending
TDuck
Privatizable survey and form system with drag and drop design, analysis, and webhook sync
Nextcloud Forms
Self-hosted surveys and questionnaires for Nextcloud with CSV export and private responses