FastReact
FastReact is a production-ready SaaS starter kit built with FastAPI and React, designed to accelerate the development of modern web applications. It provides a fully integrated foundation with essential features like authentication (including Google OAuth), Stripe-based subscription billing, multi-tenant architecture for B2B/B2C scenarios, and a clean separation of admin and user dashboards. The kit ships with a conversion-optimized landing page template, transactional email support via Resend/SendGrid/Azure, and Docker containerization for easy deployment. Beyond typical boilerplate, FastReact includes advanced AI-ready capabilities: a built-in AI credit metering and billing system that tracks token usage, enforces monthly allowances per plan, and supports pay-as-you-go top-ups. A sample AI application (with LLM calls and streaming) is wired end-to-end, serving as a reference implementation. The backend follows a three-layer architecture (API, service, repository) with dependency injection, while the frontend is a React SPA with TypeScript, Tailwind CSS, and DaisyUI for a polished UI. FastReact aims to eliminate repetitive infrastructure work, allowing teams to focus on their unique product logic. It covers the entire SaaS lifecycle from user onboarding to subscription management and analytics. All code is included with a one-time purchase, and a detailed documentation site guides users through setup and customization. Regular updates keep the stack current.
- Category
- Productivity
- Pricing
- Paid
Problem solved
FastReact solves the problem of building a full-featured SaaS application from scratch by providing a pre-built, customizable foundation. Instead of spending months implementing authentication, billing, multi-tenancy, and admin interfaces, developers can start with a battle-tested codebase that covers these common requirements, significantly reducing time to market.
Use cases
- Building a B2B SaaS platform with multi-tenant organizations and team management
- Launching an AI-powered application with usage-based billing and credit metering
- Rapid prototyping of a new SaaS product with modern React and FastAPI stack
- Creating a subscription-based web app with Stripe payments and plan management
- Setting up an internal tool with role-based access and admin dashboards
Audience
- Developers
- Startups
- Product Managers
Pros
- Saves months of development time on common SaaS features
- Modern, performant stack (FastAPI, React, TypeScript)
- Includes advanced AI credit billing and metering out of the box
- Comprehensive multi-tenancy and role-based access control
- Detailed documentation and example AI app for quick adaptation
Cons
- Paid product (one-time purchase, not open source)
- Requires familiarity with FastAPI, React, and TypeScript
- Opinionated architecture may not fit all project structures
- Limited to Python/React ecosystem; not suitable for other stacks
Official website: https://fastreact.dev/
Canonical LambdaBase page: https://www.lambdabase.com/tools/fastreact