Project category
SaaS / Web App tech stacks
Multi-tenant products where users log in, manage data, and often pay subscriptions. 11 production examples.
Production SaaS / Web App projects
- Scheduling SaaS Classic Cal.com Splitting the tRPC-based web app from an independently versioned NestJS Platform API lets Cal.com serve both its own product and third-party developers from one monorepo, while Turborepo and per-integration app-store packages keep dozens of calendar/payment providers buildable and testable in isolation.
- Open-Source SEO Research Platform Hybrid OpenSEO Running on Cloudflare Workers with D1, Workflows and Durable Objects makes it free-tier friendly to self-host and to scale when hosted. Supporting both D1 and Postgres through Drizzle, plus a Docker path, keeps the project portable beyond Cloudflare.
- Personal Health Records & Medical EHR Engine Classic Fasten Health A single distroless Docker image embeds the Angular build inside the Go binary and defaults to file-based SQLite so a family can self-host medical records without provisioning a separate database or web server.
- Photo & Video Management Platform Hybrid Immich Machine-learning inference is split into its own FastAPI/Python service with pluggable CPU/GPU backends so heavy models stay off the request-serving NestJS process, while BullMQ and Redis move thumbnailing and job dispatch out of the request/response path.
- Open-Source SaaS Template AI-agent Taxonomy Built to demonstrate the App Router, server components, and Next.js 13 data fetching patterns in one realistic, full-featured codebase.
- Conversational Form Builder AI-agent Typebot The editor and the chat runtime are separate Next.js apps built from one Dockerfile, so the public chat runtime scales apart from the editor. Bot logic, Forge integration blocks and the Prisma schema live in shared Bun workspace packages that both apps use.
- Survey & Feedback SaaS AI-agent Formbricks A pnpm/Turborepo workspace with a shared dependency catalog lets the web app, background jobs, caching, and AI provider config ship as separate packages while a dedicated Authzed service keeps permission logic out of application code.
- Personal Finance AI-agent Maybe A Rails 7.2 monolith with Hotwire (Turbo and Stimulus) and ViewComponent avoids a separate frontend build, while PostgreSQL plus Redis-backed Sidekiq handle storage and background account-sync jobs; the project is now archived, reflecting its final v0.6.0 architecture.
- E-signature SaaS AI-agent Documenso Signing logic is isolated in its own package with a swappable transport (local certificate or Google Cloud KMS) so self-hosters can choose key custody, while Prisma and a generated Kysely client cover both everyday CRUD and the raw SQL that document/signature queries need.
- CRM SaaS Hybrid Twenty Twenty provides an extensible, modern CRM architecture featuring metadata-driven custom objects, GraphQL APIs, and clean UI design.
- Project Management Classic Plane Splitting web, admin, space, live, and api into independently buildable pnpm/Turborepo packages, and moving Yjs-based collaborative editing into its own Hocuspocus service, keeps the Django API and Node frontends decoupled while still shipping from a single monorepo.
AGENTS.md rules and agent skills for SaaS / Web App
django-postgres-redis/AGENTS.mdDjango + PostgreSQL + Redis + CeleryProduction guidelines for Django 6 enterprise applications, PostgreSQL connection pooling, Redis caching, and Celery async workers. intermediatefastapi-python-postgres/AGENTS.mdFastAPI + Python + PostgreSQL (Async SQLAlchemy & Pydantic v2)Production guidelines for FastAPI, Pydantic v2 validation, Async SQLAlchemy 2.0 (asyncpg), Alembic migrations, and PostgreSQL/Redis. intermediatenestjs-postgres-redis/AGENTS.mdNestJS + PostgreSQL + Redis + BullMQEnterprise backend architecture guidelines for NestJS modular design, PostgreSQL connection pooling, Redis BullMQ background jobs, and DTO validation. intermediatenextjs-ai-sdk-jev/AGENTS.mdNext.js + Vercel AI SDK + Jev (System One + LLM)Next.js rules for Jev: typed TypeSafe decisions route, classify and gate on the server, the Vercel AI SDK streams LLM text, and confidence decides what runs. intermediatelaravel-livewire-postgres/AGENTS.mdLaravel + Livewire + PostgreSQLProduction guidelines for Laravel 13 monoliths, Livewire reactive components, Eloquent ORM query discipline, and queued job workers. intermediatenextjs-drizzle-supabase/AGENTS.mdNext.js 16 + Drizzle ORM + SupabaseProduction guidelines for Next.js App Router, Drizzle ORM with postgres-js, Supabase Transaction Pooler (prepare: false), and RLS security. starternextjs-prisma-postgres/AGENTS.mdNext.js 16 + Prisma ORM + PostgreSQLProduction guidelines for Next.js App Router, Server Actions, Prisma connection pooling, PgBouncer/Neon tuning, and Zod schema validation. starternode-express-mongodb/AGENTS.mdNode.js + Express + MongoDBProduction guidelines for Express REST APIs, Mongoose schema design, and MongoDB indexing/transaction discipline. intermediatephoenix-liveview-postgres/AGENTS.mdElixir + Phoenix LiveView + PostgreSQLReal-time reactive web architecture for Elixir 1.20, Phoenix 1.8+, LiveView HTML-over-WebSockets, OTP supervision trees, and Ecto. advancednuxt-vue-postgres/AGENTS.mdNuxt 4 + Vue + PostgreSQLProduction guidelines for Nuxt 4 server routes and universal rendering, Vue 3 Composition API, and PostgreSQL via a typed query layer. starterrust-axum-htmx-askama/AGENTS.mdRust + Axum + htmx + Askama (Server-Rendered Web App)Server-rendered Rust web app rules: Axum 0.8, compile-time Askama templates, htmx partials, sqlx 0.9 + PostgreSQL, and a cargo check loop for AI agents. intermediaterust-leptos-fullstack/AGENTS.mdLeptos Full-Stack Rust (SSR + Hydration on Axum)Full-stack Rust web app rules: Leptos 0.8 SSR with hydration, server functions on Axum, sqlx + PostgreSQL, cargo-leptos and Tailwind, written for AI agents. advancedrust-loco-saas/AGENTS.mdLoco + SeaORM + PostgreSQL (Rails-Style Rust SaaS)Rails-style Rust SaaS rules for Loco: generators, SeaORM models and migrations, Tera views or htmx scaffolds, JWT auth, background workers and mailers. intermediatesveltekit-postgres-drizzle/AGENTS.mdSvelteKit + PostgreSQL + Drizzle ORMProduction guidelines for SvelteKit form actions and load functions, Drizzle ORM over PostgreSQL, and Svelte 5 runes-based reactivity. starterrails-postgres-redis/AGENTS.mdRuby on Rails + PostgreSQL + Redis + SidekiqProduction guidelines for Ruby on Rails monoliths, ActiveRecord pool tuning, Redis Sidekiq background jobs, and modern Hotwire or React UI architecture. intermediate
Questions about SaaS / Web App stacks
How many SaaS / Web App tech stacks are in the directory?
11 verified production SaaS / Web App projects are currently indexed, each with a full architecture breakdown and copy-paste AI scaffolding prompt.
What AGENTS.md rules or agent skills apply to SaaS / Web App projects?
Django + PostgreSQL + Redis + Celery, FastAPI + Python + PostgreSQL (Async SQLAlchemy & Pydantic v2), NestJS + PostgreSQL + Redis + BullMQ, Next.js + Vercel AI SDK + Jev (System One + LLM), Laravel + Livewire + PostgreSQL, Next.js 16 + Drizzle ORM + Supabase, Next.js 16 + Prisma ORM + PostgreSQL, Node.js + Express + MongoDB, Elixir + Phoenix LiveView + PostgreSQL, Nuxt 4 + Vue + PostgreSQL, Rust + Axum + htmx + Askama (Server-Rendered Web App), Leptos Full-Stack Rust (SSR + Hydration on Axum), Loco + SeaORM + PostgreSQL (Rails-Style Rust SaaS), SvelteKit + PostgreSQL + Drizzle ORM, Ruby on Rails + PostgreSQL + Redis + Sidekiq are battle-tested architecture rules for this category, each with a full AGENTS.md, CLAUDE.md, Cursor .mdc file and a Claude Code SKILL.md.
How do I get a custom stack recommendation for a SaaS / Web App project?
Take the STACK IT FAST architecture survey and select "SaaS / Web App" as your project type to get a ranked rule recommendation and an instant AI scaffolding prompt tailored to a "SaaS / Web App" project.