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

Permit.io: Pricing, Features & Alternatives

Name: App Stack Builder
Availability: InStock

Permit.io lets developers define permissions as code or in a web UI that product and support teams can use too, then enforces them through a policy decision point (PDP) that runs next to your app, so checks stay fast and keep working if Permit's cloud is unreachable. It supports role-based, attribute-based and relationship-based models, multi-tenancy, approval flows and embeddable user-management components, and it keeps policy in sync using OPAL, its Apache-2.0 open-source project. It has added permission controls for AI agents and MCP tools.

The Community plan is free forever for up to 1,000 monthly active users, 20 tenants, 25 roles and 3 environments. Pro and Enterprise are priced on request; Enterprise removes the limits and adds SOC 2, HIPAA BAA, on-prem deployment and an uptime SLA. Startups and open-source projects can ask for discounts. As of October 2026.

Permit.io Pricing Plans (2026)

Plan	Price	Highlights
CommunityPopular	Free	1,000 monthly active users · 20 tenants · 3 environments, 25 roles
Pro	Contact sales	Higher MAU and tenant limits · Paid support
Enterprise	Custom	Unlimited MAU and tenants · On-prem and multi-cloud · SOC 2, HIPAA BAA

Pricing summary: Free · paid plans by quote. Always confirm current pricing on the official site.

Key Permit.io Features

1,000 monthly active users
20 tenants
3 environments, 25 roles
Unlimited developers and PDPs

Pros

+RBAC, ABAC and ReBAC in one product
+UI that non-engineers can use to manage permissions
+Local decision point keeps checks fast

Cons

−Paid pricing is not published
−Free plan caps tenants at 20
−Another hosted dependency in the request path

Best Permit.io Alternatives

Compare all

Cerbos

Free · paid from $25/mo

OpenFGA

Free · paid plans by quote

SpiceDB

Free · then usage-based

Permit.io Compared

Permit.io vs Cerbos Permit.io vs OpenFGA Permit.io vs SpiceDB

Permit.io FAQ

What is Permit.io used for?⌄

Permit.io is a authorization & permissions tool. Hosted authorization with a UI for roles, attributes and relationships (RBAC, ABAC, ReBAC). Free for 1,000 monthly active users and 20 tenants; policy runs in a local decision point built on the open-source OPAL.

Is Permit.io free?⌄

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

How much does Permit.io cost?⌄

Permit.io is free to use, with usage-based pricing on some features.

What are the best Permit.io alternatives?⌄

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