Star onGitHub

Engineeredto the Core

A curated collection of high-performance & beautifully engineered blocks.

Browse Blocks

Why Marrow

Engineered, not assembled

Ship in Hours

Drop a `.ts` file into your project. Every block is a self-contained server action no wiring, no boilerplate.

Security First

bcrypt hashing, token expiry, account lockout, RBAC guards hardened defaults baked in at every layer.

Type-Safe to the Core

Strict TypeScript throughout. Zod-validated inputs, typed DB adapters, and exhaustive union types.

ORM Agnostic

Bring your own database adapter. Works with Prisma, Drizzle, Supabase, or any repository pattern.

Available Now

17 open-source blocks

Free MIT Sign in to copy

All 17 blocks

Auth & Users~20m

Auth System

Full authentication with email/password, GitHub and Google OAuth, email verification, password reset, account lockout, and role-based access control all wired to Supabase.

Monetization~3m

Billing & Subscriptions

PayPal REST API integration for one-time orders, monthly and yearly subscriptions, refunds, webhook verification, usage tracking, and invoice generation wired to Supabase.

Auth & Users~4m

Team Workspaces

Multi-tenant workspace management with RBAC, member invitations, role management, and a full dashboard UI backed by Supabase with row-level security.

Communication~3m

Email System

Transactional email via Resend welcome, verify, password reset, purchase receipt, refund, team invite, affiliate payout, and newsletter templates sharing one branded HTML layout.

Utility~3m

Rate Limiting

Sliding-window rate limiting for Next.js 14 API routes in-memory for dev, drop-in Upstash Redis upgrade for production, with per-IP and per-user strategies and standard headers.

UI~5m

Dark Mode

Flash-free dark mode for Next.js 14+ with Tailwind three-way light/dark/system toggle, localStorage persistence, OS preference sync, and hydration-safe rendering.

Browse all 17 blocks

Curated Collections

Start with a bundle

Free, curated sets of blocks that work well together. Pick one and ship faster.

SaaS Starter Bundle

Four production-ready blocks covering authentication, billing, transactional email, and multi-tenant workspaces everything to launch a SaaS in a weekend.

View bundle on GitHub

Platform Infrastructure Bundle

Four blocks covering analytics tracking, real-time notifications, rate limiting, and full-text search the infrastructure layer for a growing product.

View bundle on GitHub

What's next

On the roadmap

These are real things in development not vaporware. Sign up to be notified when they ship.

Soon

Solana Auth

Sign-In-With-Solana with server-side Ed25519 verification, sessions, and walletemail account linking.

Soon

Solana Payments

USDC checkout on Solana reference-keyed transfers, finalization checks, idempotent verification.

Coming next

MarrowStack CLI

One command per block: npx marrowstack add auth. Copy any block straight into your project.

Blocks Docs Changelog About CLI (soon)Privacy Terms

samarthofficial52@gmail.com github.com/Marrow-Stack

Built by Samarth Shukla open source, MIT, made in India.
2026