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.

Bot Protection & CAPTCHAFree tier

Cloudflare Turnstile: Pricing, Features & Alternatives

Name: App Stack Builder
Availability: InStock

Turnstile replaces the picture puzzle with background checks in the browser, so most visitors never see a challenge. You drop in a widget, then verify its token on your server with one API call. It works on any site, whether or not your DNS is on Cloudflare, and it is WCAG 2.2 AAA compliant.

The free plan has unlimited challenges, up to 20 widgets with 10 hostnames each, and 7 days of analytics. Enterprise adds unlimited widgets, up to 200 hostnames per widget, 30-day analytics, ephemeral IDs and removing the Cloudflare branding, priced by quote. As of October 2026.

Cloudflare Turnstile Pricing Plans (2026)

Plan	Price	Highlights
FreePopular	$0	Unlimited challenges · 20 widgets, 10 hostnames each · 7-day analytics
Enterprise	Contact sales	Unlimited widgets, 200 hostnames each · 30-day analytics · Ephemeral IDs

Pricing summary: Free · paid plans by quote. Always confirm current pricing on the official site.

Key Cloudflare Turnstile Features

Unlimited challenges
20 widgets, 10 hostnames each
7-day analytics
WCAG 2.2 AAA

Pros

+Free with no request cap
+Most visitors never see a puzzle
+Works on sites that are not on Cloudflare

Cons

−Free plan keeps Cloudflare branding
−Only 7 days of analytics on Free
−A challenge widget, not full bot management for your API

Best Cloudflare Turnstile Alternatives

Compare all

hCaptcha

Free · paid from $99/mo

Google reCAPTCHA

Free · paid from $8/mo

Arcjet

Free · paid from $25/mo

Cloudflare Turnstile Compared

Cloudflare Turnstile vs Arcjet Cloudflare Turnstile vs hCaptcha Cloudflare Turnstile vs Google reCAPTCHA

Cloudflare Turnstile FAQ

What is Cloudflare Turnstile used for?⌄

Cloudflare Turnstile is a bot protection & captcha tool. Free CAPTCHA replacement from Cloudflare: an invisible or one-click check with unlimited challenges, and your site does not need to be on Cloudflare.

Is Cloudflare Turnstile free?⌄

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

How much does Cloudflare Turnstile cost?⌄

Cloudflare Turnstile is free to use, with usage-based pricing on some features.

What are the best Cloudflare Turnstile alternatives?⌄

Popular Cloudflare Turnstile alternatives include hCaptcha, Google reCAPTCHA, Arcjet. Compare pricing and features on our Cloudflare Turnstile alternatives page.