Open Source Alternatives to Formspree

A form backend service that allows developers to collect form submissions without writing server-side code. The product provides an API endpoint for HTML and JavaScript forms, handling data validation, spam filtering via machine learning, and email notifications. It includes a submission inbox with analytics and export options to CSV or JSON, as well as direct integrations with third party tools such as HubSpot, Salesforce, Slack, and Google Sheets. It is used by freelancers, agencies, and companies to deploy production forms via CI/CD or simple HTML snippets. The service also offers a popup form tool called Formbutton and a dedicated CLI and React library for more complex JavaScript implementations. Users can manage submissions through a centralized inbox and set up custom spam rules or reCAPTCHA to protect their data.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Formspree give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 2 open source alternatives to Formspree. The most popular are Router.so and Formizee. Most use the AGPL-3.0 or Apache-2.0 license, and 2 offer an official Docker image.