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.

Internal Tools & Admin PanelsFree tier

Retool: Pricing, Features & Alternatives

Retool is the default answer to "we need a screen for support to refund an order": a component library, query editor and permissions model that turn a Postgres connection into an internal app in an afternoon. Pricing splits builders ($10) from internal users ($5) on Team, which keeps read-only viewers cheap; Business at $50 per builder adds audit logs, granular permissions and embedded portals.

Retool Pricing Plans (2026)

Plan	Price	Highlights
Free	$0 (up to 5 users)	Unlimited web and mobile apps · 500 workflow runs / month · 5 GB storage
TeamPopular	$10 / builder / month (plus $5 per internal user)	5,000 workflow runs · Staging environment · App release versions
Business	$50 / builder / month (plus $15 per internal user)	Audit logging · Granular permissions · Portals and embedded apps

Pricing summary: Free · paid from $10/mo. Always confirm current pricing on the official site.

Key Retool Features

5,000 workflow runs
Staging environment
App release versions
Unlimited apps

Pros

+Fastest path from database to admin UI
+Huge library of components and integrations
+Cheap seats for read-only users
+Self-hosted option on higher tiers

Cons

−Costs climb quickly as builders are added
−Apps live in Retool, not your repo
−Custom logic gets awkward past a point

Best Retool Alternatives

Compare all

Appsmith

Free · paid from $15/mo

Budibase

Free · paid from $19/mo

ToolJet

Free · paid from $79/mo

Softr

From $19/mo

Retool Compared

Retool vs Windmill Retool vs Appsmith Retool vs Budibase Retool vs Softr Retool vs ToolJet

Retool FAQ

What is Retool used for?⌄

Retool is a internal tools & admin panels tool. Drag-and-drop admin panels and internal apps wired straight to your database and APIs, priced per builder.

Is Retool free?⌄

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

How much does Retool cost?⌄

Retool offers a free tier, with paid plans starting at $10/month.

What are the best Retool alternatives?⌄

Popular Retool alternatives include Appsmith, Budibase, ToolJet, Softr. Compare pricing and features on our Retool alternatives page.

Not sure if Retool fits your stack?

Get a free, AI-powered tech stack tailored to your budget, app type, and team size — including the best internal tools & admin panels pick for you.

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