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.

Heroku vs Hetzner Cloud: Which is Better in 2026?

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Hosting

Choosing between Heroku and Hetzner Cloud? Both are popular hosting tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.

Heroku is for: Teams that want the original git-push PaaS with buildpacks for many languages and a large add-on marketplace.

Hetzner Cloud is for: Developers comfortable running their own Linux servers who want cheap VPS capacity in Europe, the US or Singapore.

Quick verdict

There’s no single winner; pick on your constraint. Choose Heroku if you want buildpacks that detect your language and build without a Dockerfile. Choose Hetzner Cloud if you can run Linux servers yourself and want low monthly costs.

Heroku vs Hetzner Cloud — Side by Side

	Heroku	Hetzner Cloud
Category	Hosting	Hosting
What it is	Managed platform as a service (PaaS)	Cloud VPS provider
How you pay	Fixed monthly price per dyno	Fixed monthly price per server
Free access	None; Eco dynos from $5 a month	None
What it runs	Web and worker dynos in most languages; Postgres, Key-Value	Linux VMs; load balancers, volumes, object storage
Who runs the servers	Fully managed	You run the servers
Pricing	From $5/mo	From $7/mo
Starting price	From $5/mo	From $7/mo
Free tier	—	—
Rating	4.2	4.6
Best for	Hosting — git-push deploys, buildpacks, add-on marketplace	Hosting — VPS, self-hosting, EU servers

Pros & Cons

Heroku

Dead-simple git-push deploys
Language-agnostic buildpacks
Rich add-on marketplace
Mature and reliable

No free tier since 2022
Expensive at scale
Eco dynos sleep when idle
Slower innovation under Salesforce

Hetzner Cloud

Unbeatable price-performance
Generous RAM/CPU for the money
Hourly billing
Now has US regions

Raw VPS — you manage the stack
No managed PaaS layer
Fewer managed services than AWS/Azure
Several 2026 price increases

Key Features Compared

Heroku

Eco dynos $5 a month; they sleep after 30 minutes idle
Basic dynos $7 a month, always on
Standard-1X $25 and Standard-2X $50 a month
Heroku Postgres from $5 a month (Essential-0)
Fir, a Kubernetes-based generation, from $25 a month in Private Spaces
No free tier

Hetzner Cloud

Cost-Optimized servers from €5.99 a month, Regular Performance from €6.49
General Purpose servers with dedicated vCPUs from €43.49 a month
Locations in Germany, Finland, Singapore and the US (Oregon and Virginia)
Load balancers, free stateful firewalls and S3-compatible object storage
Prices exclude VAT

Choose Heroku if…

Budget is tight — paid plans start lower ($5/mo vs $7/mo).
You want buildpacks that detect your language and build without a Dockerfile.
You rely on Heroku add-ons for databases, logging or email.
Your company already buys Salesforce, which owns Heroku.

Heroku review & pricing

Choose Hetzner Cloud if…

You can run Linux servers yourself and want low monthly costs.
You self-host tools such as Coolify, databases or n8n.
Your users are in Europe and you want EU-based servers.

Hetzner Cloud review & pricing

Frequently Asked Questions

Is Heroku better than Hetzner Cloud?⌄

What is the difference between Heroku and Hetzner Cloud?⌄

What it is — Heroku: Managed platform as a service (PaaS). Hetzner Cloud: Cloud VPS provider. How you pay — Heroku: Fixed monthly price per dyno. Hetzner Cloud: Fixed monthly price per server. Free access — Heroku: None; Eco dynos from $5 a month. Hetzner Cloud: None. What it runs — Heroku: Web and worker dynos in most languages; Postgres, Key-Value. Hetzner Cloud: Linux VMs; load balancers, volumes, object storage. Who runs the servers — Heroku: Fully managed. Hetzner Cloud: You run the servers.

Heroku vs Hetzner Cloud: which is cheaper?⌄

Heroku pricing: From $5/mo. Hetzner Cloud pricing: From $7/mo. Confirm current pricing on each tool's official site, as plans change.

Which is rated higher, Heroku or Hetzner Cloud?⌄

In our catalog, Heroku rates 4.2 out of 5 and Hetzner Cloud rates 4.6 out of 5, so Hetzner Cloud has a slight edge on reviews.

When should I skip both Heroku and Hetzner Cloud?⌄

Skip Heroku if you want a free plan. Render, Railway and Netlify have one. Skip Hetzner Cloud if you don’t want to manage servers. Render, Railway and Vercel are fully managed.

Sources · tool facts checked November 2026