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.

All launches

Developer Utilitiesmarkstream.simonhe.meJul 19, 2026

Markstream

Name: App Stack Builder
Availability: InStock

Streaming Markdown renderer for AI chat across five frontend frameworks

Visit Markstream Share on X

About

Markstream is an open-source streaming Markdown renderer built for AI chat interfaces. It renders incomplete Markdown progressively while tokens arrive, avoiding the flicker and broken formatting common in ordinary Markdown renderers. The project supports Vue and Nuxt, React and Next.js, Svelte, Angular, and Vue 2, with Mermaid diagrams, KaTeX math, syntax highlighting, safe HTML, custom components, and SSR support. It is designed for developers building assistants, copilots, documentation chat, and other real-time LLM experiences.

Pricing

Free and open source under the MIT License.

Submitted by

Simon He

Built something?

Submit your tool to get featured on our daily launches and a shoutout on social.

Submit your tool

Markstream

About

Pricing

More in Developer Utilities

BountySignal

Cadence Starter

Built something?