docassemble

docassemble is a free, open-source expert system for building guided web interviews that collect information from users and apply rules and logic to produce outcomes. It is widely used for document automation, but it can also submit applications, store user input, and integrate with external systems.

Key Features

• Guided, logic-driven interviews that adapt questions based on prior answers
• Document assembly and generation in common formats (PDF, DOCX, RTF)
• Interview authoring using YAML, with Markdown for text and Python for logic
• Multi-user workflows for scenarios involving multiple participants
• Extensibility through Python code and reusable packages
• Background tasks for running work outside the active user session
• API capabilities for integrating with third-party services and automating input/output

Use Cases

• Legal and administrative form automation with downloadable, filled documents
• Intake and eligibility screening that dynamically adjusts questions
• Guided applications that store submissions and exchange data with external APIs

docassemble is a flexible platform for building structured, rules-based web interviews while keeping development approachable through YAML and Markdown with optional Python for advanced logic. It fits teams that need reliable conditional flows, reusable interview components, and automated document output.