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

Agent Infrastructureqarinah.ioJul 25, 2026

Qarinah

Name: App Stack Builder
Availability: InStock

Cited project memory for coding agents with 98.71% less repeated context

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About

Qarinah is a local-first project-memory compiler for coding agents. It turns decisions, code structure, tool outcomes, approvals, and evidence into small cited context packs for Codex, Claude Code, CLI tools, and MCP clients. Context stays portable across editors through deterministic Markdown and JSON views, a typed evidence graph, and import/export workflows. In the published evaluator, 442,113 estimated full-history input-context tokens became 5,682 - 98.71% less repeated context - while every required target was covered in the top five. Qarinah is installable from npm, works without a Qarinah API key, and is Apache-2.0 open source.