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.

Payment Gateway

Paddle: Pricing, Features & Alternatives

Paddle acts as a Merchant of Record, handling payments, subscriptions, invoicing, VAT/GST compliance, and fraud. It is designed primarily for SaaS companies selling globally without managing tax or legal complexity.

Paddle Pricing Plans (2026)

Plan	Price	Highlights
Pay as you goPopular	5% + $0.50 per transaction	Merchant of Record · Global tax compliance (VAT/GST) · Subscriptions & billing
Custom	Custom pricing	Lower transaction fees at scale · Custom billing workflows · Dedicated account manager

Pricing summary: Usage-based. Always confirm current pricing on the official site.

Key Paddle Features

Merchant of Record
Global tax compliance (VAT/GST)
Subscriptions & billing
Fraud & chargeback handling
Checkout & invoicing
No setup or monthly fees

Best Paddle Alternatives

Compare all

Lemon Squeezy

Usage-based

PayPal / Braintree

Usage-based

Stripe

Usage-based

Paddle FAQ

What is Paddle used for?⌄

Paddle is a payment gateway tool. All-in-one payments, billing, and tax compliance platform for SaaS businesses.

Is Paddle free?⌄

Paddle does not offer a permanent free tier.

How much does Paddle cost?⌄

Paddle uses usage-based (pay-as-you-go) pricing — see the official pricing page for current rates.

What are the best Paddle alternatives?⌄

Popular Paddle alternatives include Lemon Squeezy, PayPal / Braintree, Stripe. Compare pricing and features on our Paddle alternatives page.

Not sure if Paddle fits your stack?

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