v1.6 — Check out the current featuresThe production-ready
The production-ready
foundation for AI-built SaaS.
AI can generate features. Cornerstone provides the architecture.
Build software that survives success.
One-time payment · Full source code · Lifetime updates
Skip 3+ months of setupBuilt on Next.js 16 + TypeScriptA production codebase, not a demo
Demo
Look how easy Saas
creation will be
Used by builders shipping real SaaS products with AI tools
Next.js 16StripePostgreSQLMulti-tenant architectureProduction-tested systems
The problem
AI builds apps. It does not build systems.
AI tools can generate a working prototype in minutes.
But real SaaS is not a prototype.
It needs:
Most apps fail not at launch.
They fail when real users arrive.
Because the foundation was never built for production.
The cost of ignoring this
Every SaaS builder repeats the same cycle.
01
Rebuild auth
02
Rebuild Stripe integration
03
Rebuild roles and permissions
04
Fix scaling issues later
05
Patch architecture under pressure
AI makes this worse.
It accelerates building the wrong foundation faster.
The solution
Cornerstone is that foundation.
A complete production-ready SaaS system designed for AI-assisted development.
You don't start from scratch.
You start from a real system.
What you get
Everything needed to run a real SaaS.
Core Systems
- Authentication (email, Google, GitHub)
- Multi-tenant organizations
- Role-based access control (Owner / Admin / Member)
- Session management with security controls
- MFA (TOTP + recovery codes)
Business Layer
- Stripe billing (subscriptions, upgrades, trials, proration)
- Plan limits enforcement
- Customer portal integration
System Infrastructure
- Feature flags (gradual rollout system)
- Webhooks (signed + retry system)
- Background jobs system (Postgres-based queue)
- Email system (verification, billing, alerts, invites)
Admin & Control
- Full admin dashboard
- User, org, and subscription management
- Audit logs for every critical action
Developer Infrastructure
- API key system (scoped + revocable)
- File uploads (S3-compatible)
- Rate limiting
- Security headers & protections
Observability
- Error tracking integration
- Product analytics integration
- Health check endpoints
White-label system
Key differentiator
Fully customizable without touching core code.
Rebrand the entire application instantly.
No rebuild required.
Logo upload
Brand colors
Fonts
Theme system (runtime changes)
Engineering quality
Not a starter kit. A production system.
20Database models
230+Automated tests
- Real migration system (not "db push hacks")
- Strict TypeScript setup
- Production-grade security defaults
Built for real usage, not demos.
Who this is for
Vibe Coders
You can build fast with AI, but your apps break when they get real.
Cornerstone fixes the foundation layer AI does not handle.
Indie SaaS Founders
Stop rebuilding the same infrastructure for every idea.
Start from a complete system.
Agencies
Standardize SaaS delivery for clients.
Reduce dev time. Increase margins. Reuse everything.
What makes this different
AI can write the code. You still have to own it.
Authentication
Cornerstone: Email + Google/GitHub sign-in, TOTP 2FA, session management
With AI from scratch: You prompt it, review it and test it: email, OAuth, 2FA, sessions
Billing
Cornerstone: Stripe subscriptions, trials, customer portal, signed idempotent webhooks
With AI from scratch: You wire up Stripe, trials and webhooks, and test the edge cases
Multi-tenancy
Cornerstone: Organizations, invitations, tenant scoping on every query
With AI from scratch: You design the data model and scope every query yourself
Permissions
Cornerstone: Owner / Admin / Member roles, enforced on server and client
With AI from scratch: You build the role checks and enforce them on server and client
Admin
Cornerstone: Super-admin panel: users, organizations, plans, flags, branding
With AI from scratch: You build the internal tools you need to run it
Security
Cornerstone: Strict CSP, hardened headers, rate limits, SSRF and open-redirect guards
With AI from scratch: You research and add the protections you know to ask for
Testing
Cornerstone: 230+ unit tests plus Playwright end-to-end tests
With AI from scratch: Untested unless you write the tests
Beyond login and Stripe
- Runtime white-label: logo, colors and fonts, changed without code changes
- Feature flags with user/org allowlists and percentage rollouts
- Outgoing webhooks for your customers, HMAC-signed with retries
- Scoped, revocable API keys, stored hashed
- Per-organization audit log
- Postgres-backed background jobs, with no separate queue service to run
- 230+ unit tests plus Playwright end-to-end tests
- One-time price, full source code, unlimited projects
Outcome
Without Cornerstone
- 2–3 months rebuilding infrastructure
- Debugging auth and billing issues
- Scaling problems after launch
- Fragmented AI-generated architecture
With Cornerstone
- Start building features immediately
- Launch faster
- Scale safely
- Focus only on what makes your product unique
The offer
Cornerstone — $499 one-time
Includes:
- Full source-code access
- Unlimited commercial usage
- Lifetime updates
- Complete SaaS foundation system
- White-label branding system
- Documentation
- Email support
$499/ one-time
Pay once · Full source · Lifetime updates
14-Day "Not as Described" Guarantee
If Cornerstone materially fails to match what's described here, tell us within 14 days of delivery and you get a full refund. Terms, section 7
The real fix you may not know you need
AI is accelerating software creation.
But most software is still breaking for the same reason:
No real foundation.
Cornerstone exists to fix that.
Why buy now
Why it's in your best interest to buy it right now
Price won't stay the same forever.
When future modules are added to refine it further, a price hike is certain.
If you buy today, every update is yours at no extra cost.
Want to be an early bird? Now's your chance.
FAQ
Before you ask — we already answered.
Price & Value
Cheaper ones skip multi-tenancy, RBAC, webhooks, and admin panels — the exact parts that break you at scale.
You can. It'll take 2–3 months. That's 2–3 months you're not building what actually makes you money.
AI builds features. It doesn't build systems. That's exactly why Cornerstone exists.
Trust & Risk
14-day 'Not As Described' guarantee — if it materially differs from what's shown, you get a full refund.
200+ automated tests and our demo video showcasing exactly that. Plus the info material included in your download will show you how to get there every step of the way.
Real builders who got tired of rebuilding the same infrastructure on every project. Just like you.
Technical
Next.js, React, Node.js, PostgreSQL, Prisma, Redis, Tailwind — the exact stack most modern SaaS products are already using.
It's a foundation, not a plugin — best adopted at the start of a project or a clean rebuild.
Full documentation included in addition to info materials to show you how to run everything smoothly straight out of the box.
Yes — multi-tenancy is built in from day one, not bolted on later.
It's your source code. Change anything, remove anything, extend anything.
Agency-Specific
Unlimited commercial use — one purchase, unlimited projects, forever. And you keep all the money. No hidden fees, subscriptions.
Under 10 minutes via the branding dashboard — logo, colors, fonts, no code required.
No. It's fully white-labeled. Your brand, their brand — Cornerstone is completely invisible.
Scope & Fit
No — it's the right foundation even for your first real product. Especially for your first.
If you're charging real money to real users, yes. Data leaks and broken auth kill trust faster than a bad idea.
Auth, billing, multi-tenancy, RBAC, admin panel, audit logs, webhooks, feature flags, white-label, 200+ tests, full docs, installation tutorials.
Every update is included at no extra cost — you get every improvement we ship to it, as set out in the licence.
Urgency
You'll need it the week after launch. That's too late to start building it.
Every week you spend rebuilding infrastructure is an advantage for your competitor, be ahead by 2-3 months.
Stop rebuilding infrastructure.
Start from a production-ready foundation.
Buy Cornerstone — $499
One-time payment · Full source code · Lifetime updates