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.

UI/UX

Figma vs Penpot: Which is Better in 2026?

Name: App Stack Builder
Availability: InStock

Choosing between Figma and Penpot? Both are popular ui/ux tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Quick verdict

Both are solid ui/ux options. Penpot is cheaper to start, but the right choice depends on the specific features and integrations you need.

Figma vs Penpot — Side by Side

	Figma	Penpot
Category	UI/UX	UI/UX
Pricing	Free · paid from $16/mo	Free · paid from $7/mo
Starting price	Free tier available	Free tier available
Free tier
Best for	UI/UX — design, prototyping	UI/UX — design, prototyping

Pros & Cons

Figma

Industry-standard ui-ux tool
Best-in-class collaboration
Strong design system support
Excellent developer handoff
Huge ecosystem and community

Advanced features require paid plans
Can become expensive at scale
Limited logic compared to UXPin

Penpot

True open-source with zero vendor lock-in
Strong collaboration between designers and developers
Affordable pricing for growing teams
Plugin extensibility
Capped pricing prevents cost explosion

Smaller ecosystem than Figma
Fewer built-in templates
Enterprise features require higher base cost

Choose Figma if…

you want a free tier to start, and Figma Collaborative ui-ux design platform for designing, prototyping, and handing off products in real time.

Figma review & pricing

Choose Penpot if…

you want a free tier to start, and Penpot Open-source design and prototyping platform with collaborative ui-ux tooling for teams.

Penpot review & pricing

Frequently Asked Questions

Is Figma better than Penpot?⌄

Both are solid ui/ux options. Penpot is cheaper to start, but the right choice depends on the specific features and integrations you need.

What is the difference between Figma and Penpot?⌄

Figma — Collaborative ui-ux design platform for designing, prototyping, and handing off products in real time. Penpot — Open-source design and prototyping platform with collaborative ui-ux tooling for teams. Both are ui/ux tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Figma vs Penpot: which is cheaper?⌄

Figma pricing: Free · paid from $16/mo. Penpot pricing: Free · paid from $7/mo. Confirm current pricing on each tool's official site, as plans change.

See more options in our guide to the best ui/ux tools for startups.

Still not sure which to pick?

Get a free, AI-powered tech stack — including the best ui/ux pick for your budget and team — in 60 seconds.

Build my stack free