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.

Authorization & PermissionsFree tier

Cerbos: Pricing, Features & Alternatives

Name: App Stack Builder
Availability: InStock

Cerbos separates authorization logic from code: rules live in YAML policy files, versioned and tested like code, and a stateless decision point answers "can this principal do this action on this resource?" over gRPC or HTTP. Because it holds no data of its own, you pass in the attributes, which keeps it simple to deploy as a sidecar, a service or embedded via WebAssembly. It has about 4,600 GitHub stars and SDKs for the main languages. Cerbos Hub adds a policy editor, CI builds, rollout to every decision point, audit logs and multi-tenant policies.

The PDP is free forever under Apache-2.0 with no account. Hub has a free Proof of Concept tier for 100 monthly active principals, Development from $25 a month (100 principals included, three-month free trial) and Production from $933 a month with 5,000 included; extra principals start at $0.25 each and fall with volume. Enterprise is custom. Paying yearly saves 15%. As of October 2026.

Cerbos Pricing Plans (2026)

Plan	Price	Highlights
Open source PDP	Free (Apache-2.0)	Run anywhere, no account · YAML policies with tests · Audit logs
Hub DevelopmentPopular	From $25 / month	100 monthly active principals included · 5 developers, 10 PDPs · 3 months of audit logs
Hub Production	From $933 / month	5,000 monthly active principals included · Unlimited workspaces and PDPs · 1 year of audit logs
Enterprise	Custom	SSO · Self-hosted Hub · Enterprise support SLA

Pricing summary: Free · paid from $25/mo. Always confirm current pricing on the official site.

Key Cerbos Features

100 monthly active principals included
5 developers, 10 PDPs
3 months of audit logs
3-month free trial

Pros

+Free, stateless PDP that is easy to deploy
+Policies as code with built-in testing
+Published, usage-based Hub pricing

Cons

−You pass in all attributes on each check
−Relationship graphs are less natural than in Zanzibar engines
−Hub Production is a big step up from Development

Best Cerbos Alternatives

Compare all

Permit.io

Free · paid plans by quote

OpenFGA

Free · paid plans by quote

SpiceDB

Free · then usage-based

Cerbos Compared

Cerbos vs OpenFGA Cerbos vs SpiceDB Cerbos vs Permit.io

Cerbos FAQ

What is Cerbos used for?⌄

Cerbos is a authorization & permissions tool. Open-source (Apache-2.0) policy decision point: write RBAC and ABAC rules in YAML, run the stateless PDP next to your app for free, and add Cerbos Hub from $25 a month to manage and roll out policies.

Is Cerbos free?⌄

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

How much does Cerbos cost?⌄

Cerbos offers a free tier, with paid plans starting at $25/month. Some plans are usage-based (pay-as-you-go).

What are the best Cerbos alternatives?⌄

Popular Cerbos alternatives include Permit.io, OpenFGA, SpiceDB. Compare pricing and features on our Cerbos alternatives page.