/ AI SaaS Platform | 2026
A credit-based AI chat product combining persistent conversations, authentication, usage control, and Stripe Checkout.
/ Project overview
Zentiva is a full-stack AI SaaS experience built around an authenticated chat workspace. Users can create conversations, revisit saved threads, interact with Google Gemini, track their remaining credits, and enter a Stripe Checkout flow from the product's pricing experience.
/ Process
An AI chat interface becomes a real product only when identity, persistence, usage limits, billing entry points, and application state work together. The challenge was designing those systems as one coherent experience rather than treating the model call as the entire application.
Clerk handles authentication while Prisma and PostgreSQL store users, threads, messages, and credit state. The backend checks available credits before calling Gemini, stores completed exchanges, and deducts usage after successful responses. Stripe Checkout Sessions provide the payment-entry workflow.
/ The result
The project demonstrates the product infrastructure surrounding an AI model: persistent user data, authenticated access, credit-based usage rules, payment integration, and a polished SaaS workspace.
/ Next project
Northline