QuickStartJS

QuickStartJS is a production-ready SaaS boilerplate for Next.js and SolidStart that provides pre-built features including authentication, payment processing, AI chat, and an admin dashboard. It is designed for developers and entrepreneurs who want to launch software products without spending months building foundational infrastructure from scratch. The project was created by a solo developer who experienced the high cost of building standard application components and decided to create a complete, reusable foundation.

Key Capabilities

• Authentication with Supabase Auth supporting email-password, Google, and GitHub sign-in methods with complete session management, protected route handling, password reset flows, and account management features.
• Payment processing through Stripe integration with subscription management, one-time payments, paywalls, billing workflows, embedded checkout, customer portal, order tracking, and webhook event handling for real-time synchronization.
• AI chat agent powered by OpenAI for building conversational features and intelligent assistants directly into SaaS applications without requiring separate AI infrastructure.
• Comprehensive admin dashboard with user management, analytics dashboards, business metrics tracking, and administrative controls for monitoring application health and user activity.
• 32 built-in themes for rapid UI customization allowing developers to quickly change the visual appearance without extensive CSS or design work.
• Email delivery via Resend with transactional email templates for onboarding sequences, password reset notifications, billing alerts, and system notifications.
• Input validation and type safety with Zod schemas applied consistently across API boundaries, form inputs, and data transformations throughout the codebase.

Technology Stack

• Next.js and SolidStart as the two supported framework options with full feature parity across both codebases so developers can choose their preferred rendering approach.
• Supabase for backend services including PostgreSQL database with pre-configured schemas and row-level security policies, authentication, and file storage.
• Stripe for payment processing with subscription management, customer portal integration, webhook synchronization, and billing infrastructure.
• OpenAI API integration for building AI-powered features directly into the SaaS product without additional third-party services.
• Resend for email delivery with transactional notification templates and programmatic sending capabilities.
• Zod for runtime schema validation ensuring type safety across API routes, database operations, and form submissions.

Target Audience

• Independent developers and solo founders building their first SaaS product who need a complete, production-quality foundation with all standard features ready to use.
• Small development teams that want to skip repetitive boilerplate code and focus their engineering effort on unique product differentiators and core business logic.
• Entrepreneurs who want to validate SaaS ideas quickly without investing weeks or months in authentication systems, payment integration, and admin infrastructure.

Pricing

• Basic plan at a one-time payment of $219 including Supabase Auth, Stripe Payments, Admin Dashboard, and 32 Themes with lifetime updates and access to both codebases.
• Pro plan at $249 adding the OpenAI Chat Agent, Analytics Dashboard, Blog engine, and Legal Templates on top of all Basic features.
• Ultimate plan at $1,499 including all Pro features plus a 2-hour code review session with the founder for personalized optimization advice.
• All plans include lifetime updates, comprehensive documentation, and access to both the Next.js and SolidStart versions of the boilerplate.