What is App Stack Builder?

App Stack Builder is a free AI-powered tool that helps founders and developers choose the right tech stack for their projects based on budget, app type, team size, and skill level.

What is the best tech stack for SaaS in 2026?

The best tech stack for SaaS in 2026 typically includes Next.js 16 for frontend, Supabase for database and auth, Vercel for hosting, Stripe for payments, and PostHog for analytics. App Stack Builder can generate a personalized recommendation based on your specific budget and requirements.

Is App Stack Builder free to use?

Yes, App Stack Builder is completely free to use. You can generate unlimited tech stack recommendations without any cost.

What types of apps can I build with the recommended stacks?

App Stack Builder supports various app types including SaaS applications, web apps, mobile apps, e-commerce stores, internal tools, and AI/ML products.

How much does a SaaS tech stack cost per month?

A modern SaaS tech stack can cost anywhere from $0-50/month for bootstrapped startups using free tiers, $100-300/month for growth-stage startups, to $500+/month for enterprise-ready infrastructure. App Stack Builder helps you find the best tools within your specific budget.

What is the best tech stack for solo founders?

For solo founders, we recommend Next.js + Vercel (free), Supabase (free tier), Supabase Auth (free), Stripe (pay as you go), and Plausible or PostHog for analytics. This stack can run your entire SaaS for under $50/month.

Can I export my tech stack recommendations?

Yes, you can export your tech stack recommendations as a PDF document or copy them to your clipboard. You can also share a link to your stack with others.

AuthFree tier

NextAuth.js: Pricing, Features & Alternatives

NextAuth.js (now Auth.js) is a flexible, open-source authentication library for Next.js applications. It supports OAuth providers, email/passwordless login, credentials-based auth, JWT and database sessions, and integrates seamlessly with modern full-stack apps.

NextAuth.js Pricing Plans (2026)

Plan	Price	Highlights
Open SourcePopular	Free	Unlimited users · OAuth providers (Google, GitHub, GitLab, etc.) · Email / passwordless authentication
Auth.js Cloud (Optional)	Usage-based / Custom	Managed authentication infrastructure · Hosted OAuth and session handling · Reduced operational overhead

Pricing summary: Free. Always confirm current pricing on the official site.

Key NextAuth.js Features

Unlimited users
OAuth providers (Google, GitHub, GitLab, etc.)
Email / passwordless authentication
Credentials-based authentication
JWT and database sessions
Built-in CSRF protection
Secure cookie handling
Works with any database

Pros

+Completely free and open source
+Deep integration with Next.js
+No vendor lock-in
+Highly customizable auth flows
+Strong security defaults

Cons

−Requires backend setup and maintenance
−No built-in admin dashboard
−Not beginner-friendly compared to hosted auth services

Best NextAuth.js Alternatives

Compare all

Clerk

Free · paid from $25/mo

SuperTokens

Free · paid from $0.02/mo

Auth0

Free · paid from $35/mo

Firebase Authentication

Free

NextAuth.js Compared

NextAuth.js vs Clerk NextAuth.js vs SuperTokens NextAuth.js vs Auth0 NextAuth.js vs Firebase Authentication

NextAuth.js FAQ

What is NextAuth.js used for?⌄

NextAuth.js is a auth tool. Open-source authentication solution for Next.js with built-in providers, sessions, and security best practices.

Is NextAuth.js free?⌄

Yes — NextAuth.js has a free tier you can start with, and paid plans for more usage and features.

How much does NextAuth.js cost?⌄

NextAuth.js is free to use, with usage-based pricing on some features.

What are the best NextAuth.js alternatives?⌄

Popular NextAuth.js alternatives include Clerk, SuperTokens, Auth0, Firebase Authentication. Compare pricing and features on our NextAuth.js alternatives page.

Not sure if NextAuth.js fits your stack?

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