nextsaas.ai Kit
The AI-first Next.js SaaS Boilerplate
A complete AI ecosystem that powers your product — and your entire development workflow.
Production-ready from day one. Multi-provider AI integration with intelligent cost management for your end users,
plus a dedicated AI-powered dev toolkit that transforms the way you build.
Built to ship fast and grow faster.
One Line of Code.
Your Billing System. Ready to Go.
Two ways to monetize your AI features. Pick the model that fits your business. Switch anytime with a single environment variable.
# NEXT_PUBLIC_PRICING_MODEL=classic_saas
NEXT_PUBLIC_PRICING_MODEL=credit_based
Credit-Based System
Usage-based monetization where you control the pricing. Charge per AI request, per feature, or per action — you set the credit value for every call.
Classic SaaS Model
Fixed-tier subscriptions with predictable revenue. Ideal when you can estimate AI costs upfront or your margins work with flat monthly pricing.
Payments without the headache.
Get Paid. Stay Compliant. Ship Faster.
Lemon Squeezy handles global taxes, subscriptions, and checkout so you can focus on building your product.
Instant Checkout. Pre-built hosted checkout pages. No custom payment forms needed — just redirect and get paid.
Subscription Management. Monthly and yearly billing, plan upgrades, cancellations, and a self-service customer portal.
Real-time Webhooks. Lifecycle events for every subscription change with SVIX signature verification built-in.
EU Merchant of Record. VAT collection, tax compliance, and professional invoices — zero legal setup on your side.
Boilerplate Stack
AI Actually Understands
No hallucinations. No outdated API calls.
Just code that works.
Version-Locked Stack
Every dependency in this boilerplate is pinned to the exact version Claude was trained on. That means AI coding assistants don't guess. They know your APIs, your patterns, your stack.
The result: fewer errors, faster iterations, and code you can actually ship.
Why this matters
- Version-locked to AI training data
- Zero deprecated API suggestions
- Every library pairing conflict-free
- AI gets it right on the first prompt
Research proves it: “AI coding assistants generate 2x more accurate code for APIs they were trained on.*”
14+ versions locked. to the exact releases Claude was trained on. Every dependency is pinned for maximum AI compatibility.
Zero hallucinations. from deprecated APIs. Claude never suggests removed methods or outdated patterns with a version-locked stack.
Ship faster. with AI that gets it right the first time. Less debugging, less correcting AI output, more shipping.
Battle-tested combos. Every library pairing is verified to work together. No version conflicts, no peer dependency warnings, no midnight debugging.
*Based on the CloudAPIBench Study (arXiv)
React2Shell
Protected.
React2Shell affects Next.js 15 and 16 versions
so new they're outside AI training data.
Our Next.js 14 stack is immune.
Affects Next.js v15 + v16. Our v14 stack is immune — and in AI training data.
React2Shell safeZero Recurring Costs.
One Payment. Lifetime Access.
Pick your license. Start building today.
Features
Differences
Included Products
Available Upgrades
FAQ
Frequently
Asked Questions.
Everything you need to know about nextsaas.ai
Hey, I'm Sash
Founder & Developer · @heysash
The person behind the product.
Built for my own ideas first.
Now it's yours.
20+ years building for the web, always with the next idea in mind, never with the right foundation to just start. I kept jumping from concept to concept, rebuilding basics every time.
So I built what was missing: a system flexible enough for any idea, with AI at its core from day one. Not a starter template. A real foundation.
This is what I build on. And now, it's yours too.
One codebase. Flexible enough for classic SaaS,
credit-based AI apps, or anything in between.