LastSaaS

The last SaaS boilerplate you'll ever need.

LastSaaS is a complete, production-ready SaaS foundation built entirely through conversation with Claude Code. It gives you multi-tenant account management, authentication, role-based access control, white-label branding, Stripe billing, API keys, outgoing webhooks, a full admin interface, system health monitoring, credit-based usage tracking, and product analytics with telemetry — everything you need to launch a SaaS business, ready to customize for your specific product.

The bottleneck for building software isn't engineering capacity anymore — it's imagination. LastSaaS proves it: a single person with a clear vision and an AI agent can stand up what used to require a team and months of work. And because it was built with Claude Code, the codebase is fork-ready for agentic engineering — point an AI agent at it and keep building your product through conversation.

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Why LastSaaS Exists

Every SaaS product needs the same boring foundation: user accounts, teams, roles, authentication, admin dashboards, billing, usage limits, branding, webhooks, API keys. Historically, building that foundation meant weeks of plumbing before you could write a single line of your actual product.

LastSaaS eliminates that. Fork it, point an AI agent at it, and start building your product on top of a foundation that already handles:

• Multi-tenant isolation with role-based access
• JWT authentication with refresh token rotation
• Google, GitHub, and Microsoft OAuth integration
• Magic link passwordless authentication
• MFA/TOTP with recovery codes
• Email verification and password resets
• Team invitations and member management
• Stripe billing with subscriptions, per-seat pricing, trials, and credit bundles
• Plan entitlements and billing enforcement middleware
• White-label branding with custom themes, logos, landing pages, and custom pages
• API key authentication (admin and user scopes)
• Outgoing webhooks with 19 event types and HMAC-SHA256 signing
• Credit-based usage tracking (subscription + purchased buckets)
• Promotion codes and coupon management via Stripe
• Product analytics dashboard (conversion funnel, KPIs, retention cohorts, engagement metrics)
• Telemetry event system with Go SDK and REST API for custom event tracking
• A full admin interface for managing everything
• Built-in API documentation (HTML and Markdown)
• Real-time system health monitoring
• Financial metrics dashboard (revenue, ARR, DAU, MAU)
• MCP (Model Context Protocol) server for AI-powered admin access
• CLI tools for server administration
• Auto-versioning with database migrations
• Production deployment on Fly.io

This is open-source infrastructure for the agentic era of software — where the person with the idea is also the person who ships it. The codebase follows consistent patterns that AI agents navigate fluently, so you can keep evolving it the same way it was built.

How It Compares

If you're evaluating SaaS boilerplates, you've probably looked at ShipFast, Supastarter, MakerKit, SaaS Pegasus, and Gravity. Here's why technical founders choose LastSaaS instead.

Free and open-source. ShipFast costs $169, MakerKit runs $199–599, Supastarter starts at $299, SaaS Pegasus charges $249/year, and Gravity is under $1K. LastSaaS is MIT-licensed — fork it, ship it, never pay a license fee. You own the code completely.

Go backend, not another Next.js project.

... View full README on GitHub