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.

Usage-Based Billing & Metering

Orb: Pricing, Features & Alternatives

Orb ingests raw usage events and lets finance and engineering define billable metrics in SQL, then runs pricing experiments, invoicing, credits and revenue reporting on top, with warehouse sync and NetSuite and Salesforce integrations on higher tiers. It is used by AI and infrastructure companies with complex contracts. Adyen agreed to acquire Orb for $335M in June 2026 (closed July 2026) and keeps it multi-PSP. Pricing is sales-led across Core, Advanced and Enterprise, charged on billings plus events, with a platform fee on Advanced and Enterprise.

Orb Pricing Plans (2026)

Plan	Price	Highlights
CorePopular	Custom (billings + events)	Real-time event ingestion · Usage and hybrid billing · Invoicing and tax integrations
Advanced	Custom + platform fee	Data warehouse sync · Salesforce and NetSuite · Customer hierarchies
Enterprise	Custom	Enterprise SLAs · Dedicated support

Pricing summary: Usage-based. Always confirm current pricing on the official site.

Key Orb Features

Real-time event ingestion
Usage and hybrid billing
Invoicing and tax integrations

Pros

+SQL-defined metrics are flexible and auditable
+Simulate pricing changes on historical usage
+Strong finance and warehouse integrations

Cons

−No self-serve plan or public prices
−Overkill for simple subscription billing
−Now owned by a payments company (Adyen)

Best Orb Alternatives

Compare all

Lago

Free · paid from $599/mo

Flexprice

Free · paid from $500/mo

Metronome

Usage-based

Orb Compared

Orb vs Lago Orb vs Metronome Orb vs Flexprice

Orb FAQ

What is Orb used for?⌄

Orb is a usage-based billing & metering tool. Usage-based billing and revenue platform for high-volume SaaS and AI companies, with real-time metering and SQL-defined metrics. Sales-led pricing.

Is Orb free?⌄

Orb does not offer a permanent free tier.

How much does Orb cost?⌄

Orb uses usage-based (pay-as-you-go) pricing — see the official pricing page for current rates.

What are the best Orb alternatives?⌄

Popular Orb alternatives include Lago, Flexprice, Metronome. Compare pricing and features on our Orb alternatives page.