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.

Mobile Framework

Kotlin Multiplatform vs React Native (bare): Which is Better in 2026?

Name: App Stack Builder
Availability: InStock

Choosing between Kotlin Multiplatform and React Native (bare)? Both are popular mobile framework 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 Kotlin Multiplatform and React Native (bare) are strong mobile framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

Kotlin Multiplatform vs React Native (bare) — Side by Side

	Kotlin Multiplatform	React Native (bare)
Category	Mobile Framework	Mobile Framework
Pricing	Free	Free
Starting price	Free tier available	Free tier available
Free tier
Best for	Mobile Framework — kotlin, cross-platform	Mobile Framework — mobile, react-native

Pros & Cons

Kotlin Multiplatform

Native performance + shared code
Backed by JetBrains/Google
Gradual adoption possible
Great for existing native teams

Requires Kotlin knowledge
iOS UI story still maturing

React Native (bare)

Full native API access
No Expo abstractions or limits
Best for complex native integrations
Mature and battle-tested

Requires Xcode (Mac) and Android Studio
More complex setup than Expo
App store submissions require more manual work

Choose Kotlin Multiplatform if…

you want a free tier to start, and Kotlin Multiplatform Share business logic (and increasingly UI via Compose) across iOS, Android, web, and desktop from one Kotlin codebase.

Kotlin Multiplatform review & pricing

Choose React Native (bare) if…

you want a free tier to start, and React Native (bare) Meta's framework for building native mobile apps using JavaScript/TypeScript without Expo.

React Native (bare) review & pricing

Frequently Asked Questions

Is Kotlin Multiplatform better than React Native (bare)?⌄

Both Kotlin Multiplatform and React Native (bare) are strong mobile framework choices. The right pick comes down to your specific feature needs, existing stack, and team preferences.

What is the difference between Kotlin Multiplatform and React Native (bare)?⌄

Kotlin Multiplatform — Share business logic (and increasingly UI via Compose) across iOS, Android, web, and desktop from one Kotlin codebase. React Native (bare) — Meta's framework for building native mobile apps using JavaScript/TypeScript without Expo. Both are mobile framework tools; the comparison table above breaks down pricing, free tiers, and what each is best for.

Kotlin Multiplatform vs React Native (bare): which is cheaper?⌄

Kotlin Multiplatform pricing: Free. React Native (bare) pricing: Free. Confirm current pricing on each tool's official site, as plans change.

See more options in our guide to the best mobile framework tools for startups.

Still not sure which to pick?

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

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