A curated collection of free open source boilerplates and starter templates for SaaS, web, mobile and browser extension projects. Features stacks from React/Node.js to Python/Django and .NET.

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• Awesome Free SEO Backlinks - A curated list of free SEO backlinks and directories to help boost your site’s domain rating.

• Open Source SaaS Boilerplates
• Browser Extensions
• Web Development
  • React & Next.js
  • SvelteKit
  • Node.js
  • Python
  • Flask
  • Ruby on Rails
  • .NET Core
• Mobile Development
  • Android
  • iOS
  • React Native
• Star History

Production-ready, open source templates for building software-as-a-service applications, with authentication and billing included:

• Open SaaS - React, Node.js and Prisma stack with Stripe, Polar.sh or Lemon Squeezy, OpenAI, AWS S3, admin dashboard and blog.
• BoxyHQ SaaS Starter Kit - Enterprise-ready with SSO, audit logs, and multi-tenant features.
• Next.js SaaS Starter - Next.js with PostgreSQL, Stripe, and shadcn/ui.
• Nextacular - Next.js with workspaces and subscription management.
• djangorocket - Django SaaS boilerplate with Stripe subscriptions, REST API, Tailwind CSS, Celery and Docker.
• fireact.dev - React/TypeScript stack with Stripe, Firebase and i18n multilingual for B2B SaaS.
• LastSaaS - AI-native SaaS platform foundation with multi-tenant auth, Stripe billing, white-label branding, MCP server, webhooks, and admin dashboard. Built with Go, React, TypeScript, and MongoDB.
• SpeedPy - Django SaaS boilerplate with APIs, teams, billing, and an MCP server for AI agents.
• PageZERO - Cloudflare-native React/TanStack Start SaaS starter.
• Hikari - Next.js starter with Supabase authentication and Stripe subscription billing for individual-account apps.
• React Starter Kit - Full-stack React 19, tRPC, and Drizzle monorepo on Cloudflare Workers with Better Auth organizations, Stripe billing, and an Astro marketing site.

• Extro - TypeScript browser extension starter with OAuth, storage, messaging, i18n, hot reloading and one-click publishing.

• Next.js Boilerplate - Next.js starter with TypeScript, Tailwind CSS, Drizzle ORM, Vitest, Playwright, Storybook and Sentry.

• CMSaasStarter - SvelteKit, Tailwind CSS and Supabase template with marketing pages, blog, subscriptions, auth, user dashboard and pricing page.

• Graphile Starter - SaaS quick-start with user accounts and organizations, built on React, Node.js, GraphQL, PostgreSQL and PostGraphile.
• Hackathon Starter - Node.js and Express boilerplate with authentication via many OAuth providers and ready-made API examples.

• Rob's Awesome Python Template - A versatile and modern Python template.

• Enferno Framework - Flask starter with Vue 3 and Vuetify without a build step, plus auth with 2FA, passkeys and OAuth.

• Rails Tabler Starter - Rails 8 starter with Tabler UI, Hotwire, Devise, Pundit, multi-tenancy and Kamal deployment.

• Clean Architecture and Domain Driven Design Template - .NET Core solution template for creating your own application using Clean Architecture, utilizing building blocks from Domain-Driven Design.
• FullStackHero .NET Starter Kit - Multi-tenant .NET starter with ASP.NET Core Web API and a Blazor client.

• Android Architecture Blueprints - Official samples showcasing architecture patterns for Android apps, including Jetpack Compose and MVVM.

• Swift 6 Module Template - Boilerplate for reusable Swift 6 modules.

• Infinite Red Boilerplate - Infinite Red's battle-tested React Native project boilerplate, along with a CLI, component/model generators, and more.
• thecodingmachine boilerplate - React Native template for JavaScript or TypeScript apps that separates UI from business logic.
• obytes boilerplate - A template for your next React Native project: Expo, PNPM, TypeScript, Tailwind CSS, Husky, EAS, GitHub Actions, Env Vars, expo-router, react-query, react-hook-form.
• wataru-maeda boilerplate - Expo + Redux + React Navigation pre-setup TypeScript template (Expo SDK 51).
• Mobile App Code Template - Expo + Supabase starter with email auth, deep links for confirmation and password reset, in-app account deletion, row level security, and Jest tests for the auth flows (Expo SDK 57).