Inquiry on QZ Tray Integration for Multi-Tenant SaaS Web Application

[Mickael Raj]

Hello QZ Tray Team,

Greetings.

We are currently developing a SaaS-based web application using React (frontend) and Node.js (backend). Our platform follows a multi-tenant architecture, where multiple vendors (tenants) can log in and use the system independently.

Each vendor may:

• Have multiple user logins

• Access the system from multiple devices/systems

• Print receipts or documents from local printers using QZ Tray

We would like your guidance on the following points related to implementing QZ Tray in a SaaS environment:

1. Licensing & Pricing

   • Is QZ Tray free for commercial SaaS usage?

   • Do we need any premium or paid license for production use?

   • If licensing is required, is it per application, per vendor, or per device/system?

2. Implementation Details

   • Best practices for integrating QZ Tray with a React + Node.js stack

   • Handling multiple vendors and multiple user logins securely

   • Any recommended architecture for SaaS / multi-tenant usage

   • Sample or reference code for production-ready implementation (if available)

3. Security & Certification

   • Does QZ Tray require digital certificates for signing requests?

   • If yes:

     • How does certificate management work in a multi-tenant SaaS model?

     • Should certificates be managed per tenant or per application?

     • Are self-signed certificates allowed for production, or is a CA-signed certificate mandatory?

4. Deployment & Client Setup

   • Any limitations or recommendations when users access the ap