OpnForm

OpnForm is an open-source, no-code form builder for creating forms, surveys, and data-collection workflows. Its managed cloud service supports unlimited forms and submissions on the Free plan, along with form logic, validation, computed fields, pre-fills, file uploads, API access, integrations, and webhooks. Builders can publish single-page or multi-page forms, embed them on websites or Notion pages, send notifications, and connect responses to tools such as Google Sheets, Zapier, Slack, Discord, Telegram, or custom webhook endpoints. Paid tiers add capabilities for polished client-facing work and larger organizations, including branding removal, custom domains, custom SMTP, analytics, AI-assisted form generation, editable submissions, multiple workspaces, roles and permissions, advanced branding, higher upload limits, partial submissions, versioning, SSO, audit logs, external storage, white-label hosting, and support options. Teams that need infrastructure control can self-host with Docker; this route adds deployment and maintenance work, while some advanced self-hosted capabilities require license activation. OpnForm is a practical fit when unlimited response collection, workflow connectivity, and deployment choice matter more than relying on a fully managed form platform with every organizational control included at no cost.