Top SAAS GitHub Repositories & Tools (2026)

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

Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.

Open-source auth gateway connecting 1500+ SaaS providers to AI agents through SDK, CLI, MCP, HTTP, and OpenAPI.

Open-source SaaS Starter with User Roles, Organizations & Admin Panel. Built using Next.js 16, Better Auth, Drizzle, Neon, Fumadocs, Shadcn/ui, Stripe, Server Actions.

Open Source CRM for Startups and enterprises. Django + SvelteKit · Self-hosted · Multi-tenant · Free forever

Open-source CRM with native AI agent support. 37 MCP tools, REST API, self-hosted. Built with Laravel & Filament

Creates CycloneDX Bill of Materials (BOM) for your projects from source and container images. Supports many languages and package managers. Integrate in your CI/CD pipeline with automatic submission to Dependency Track server

The application framework for vertical AI SaaS — auth, workspaces, billing, credits, execution boundary, page registry. You build the agent.

Modern data layer for TypeScript apps - type-safe ORM, built-in access control, automatic query services

AI-powered README generator for GitHub. Paste a repo URL and instantly create a professional, well-structured README.md file.

A modern, open-source full-stack SaaS starter built with Next.js, TypeScript, MongoDB, and shadcn/ui a solid foundation for building scalable SaaS applications.

All AI developers deserve to get paid. Turn your AI prototype into a paid SaaS with open-source infrastructure for usage billing, payments, attribution, affiliates, anti-abuse, and deployment.