Duo vs Verdaccio: What are the differences?

## Introduction
In this comparison, we will explore the key differences between Duo and Verdaccio.

1. **Hosted vs Self-hosted**: The main difference between Duo and Verdaccio lies in how they are hosted. Duo is a cloud-hosted solution, providing a platform-as-a-service for identity and access management, while Verdaccio is a self-hosted open-source solution for private npm package management.
   
2. **Scope of Functionality**: Duo primarily focuses on multi-factor authentication, providing an extra layer of security for user authentication. On the other hand, Verdaccio is specifically designed for managing npm packages privately within an organization, offering features like access control and package caching.

3. **User Authentication vs Package Management**: Duo is geared towards enhancing user authentication through two-factor verification methods, such as push notifications, SMS, or phone calls. In contrast, Verdaccio is dedicated to managing npm packages, handling tasks like package publishing, permissions management, and proxying npm registries.

4. **Commercial vs Open-source**: Duo is a commercial product offered by Cisco, with a subscription-based pricing model and additional enterprise features like advanced reporting and integrations. Verdaccio, being open-source, is freely available to use and can be customized based on individual needs without any licensing fees.

5. **Integration Capabilities**: Duo integrates with a wide range of applications, platforms, and services to provide seamless multi-factor authentication solutions. In comparison, Verdaccio focuses on integrating with npm and Node.js ecosystem tools to streamline package management workflows within development teams.

6. **Support and Documentation**: Duo provides extensive support options, including dedicated customer support, documentation, and training resources to help users effectively utilize the platform. Verdaccio, being open-source, relies on community support through forums, GitHub issues, and documentation maintained by contributors and users.

In Summary, Duo and Verdaccio differ in their hosting approach, functionality focus, target use case, licensing model, integration scope, and support provisions.