Awesome list of open-source startup alternatives to well-known SaaS products 🚀

A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.

开源白板工具（SaaS），一体化白板，包含思维导图、流程图、自由画等。All in one open-source whiteboard tool with mind, flowchart, freehand and etc.

List of open-source alternatives to everyday SaaS products.

CSGHub is a brand-new open-source platform for managing LLMs, developed by the OpenCSG team. It offers both open-source and on-premise/SaaS solutions, with features comparable to Hugging Face. Gain full control over the lifecycle of LLMs, datasets, and agents, with Python SDK compatibility with Hugging Face. Join us! ⭐️

A free React / Next.js landing page template designed to showcase open source projects, SaaS products, online services, and more. Made by

Kimai is the #1 open-source time-tracking application. From freelancers to companies and organisations - everyone can manage timesheets, generate reports, create invoices and so much more... Web-based multi-user application, available as On-Premise or SaaS version: https://www.kimai.org

Open Source version of Claude Cowork with 500+ SaaS app integrations

Open-source SaaS Starter with User Roles & Admin Panel. Built using Next.js 14, Prisma, Neon, Auth.js v5, Resend, React Email, Shadcn/ui, Stripe, Server Actions.

SaaS Boilerplate - Open Source and free SaaS stack that lets you build SaaS products faster in React, Django and AWS. Focus on essential business logic instead of coding repeatable features!

Easy Email Editor is a feature-rich, top open-source SaaS email editor based on React and MJML.

The Open Source Ruby on Rails SaaS Template

Open-source meeting transcription API for Google Meet, Microsoft Teams & Zoom. Auto-join bots, real-time WebSocket transcripts, MCP server for AI agents. Self-host or use hosted SaaS.

A curated list of production-ready and free SaaS boilerplates and starter templates. Build your next software-as-a-service project with battle-tested open source foundations.

Open Source Next.js Saas Boilerplate

Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps

An open-source starter kit that will help you build full-stack multi-tenant SaaS platforms efficiently and help you focus on developing your core SaaS features. Built on top of popular and modern technologies such as Next JS, Tailwind, Prisma, and Stripe.

Open Brain — The infrastructure layer for your thinking. One database, one AI gateway, one chat channel — any AI plugs in. No middleware, no SaaS.

Play is free and open source Tailwind CSS template for - Startup, SaaS, Apps, Business and More. It comes with a high-quality design and all essential components & pages you need to launch a complete website.

Open source auth infrastructure for B2B SaaS

HC is open source Property Management Software(saas)

Free SaaS boilerplate (Python/PostgreSQL/ReactJS/Webpack)

An open source tool that lets you create a SaaS website from docker images in 10 minutes.

Open-source, AI-native, low-code platform for API orchestration, workflow automation, and AI agent integration across internal systems and SaaS products.

The Open Source SvelteKit SaaS boilerplate.

Best open-source SaaS boilerplate. Free, powerful & extendable.

Free HTML Template for - Startup, SaaS, Business, App, and Software Website & Landing Page. Play is 100% Free and Open-source template project that initiated by UIdeck Team.

Open-source toolkit to build an AI copilot for SaaS products

Open-source, customer support platform with fully customizable AI support agents for developers / startups shipping SaaS.

Open-source SaaS framework (React + Firebase + Stripe) with built-in Claude Code AI skills. Auth, billing, teams, and i18n in one command.