The Twelve-Factor App

The Twelve-Factor App Methodology

• Core Purpose: A methodology for building software-as-a-service (SaaS) applications designed for modern cloud platforms.
• Key Objectives:
  • Automation: Use declarative formats to minimize setup time for new developers.
  • Portability: Maintain a clean contract with the OS to ensure consistency across execution environments.
  • Cloud-Native: Designed for deployment on modern cloud platforms, reducing the need for manual server administration.
  • Agility: Minimize divergence between development and production environments to facilitate continuous deployment.
  • Scalability: Enable scaling without requiring significant changes to architecture, tooling, or development practices.
• Versatility: The methodology is language-agnostic and compatible with any combination of backing services (e.g., databases, queues, caches).
• Origins: Synthesized from the collective experience of developers at Heroku, observing the lifecycle and scaling of hundreds of thousands of applications.
• Primary Goals:
  • Address systemic problems in modern application development.
  • Establish a shared vocabulary for discussing development challenges.
  • Provide conceptual solutions to prevent software erosion and manage organic growth.