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.

PostHog vs Umami: Which is Better in 2026?

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Analytics

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

PostHog is for: Product teams who want analytics, session replay, feature flags, experiments and error tracking in one tool with a free monthly allowance.

Umami is for: Developers who want open-source, cookie-free analytics they can self-host on Postgres or buy hosted.

Quick verdict

There’s no single winner; pick on your constraint. Choose PostHog if you want product analytics, session replay and feature flags without stitching three tools together. Choose Umami if you want to self-host free, MIT-licensed analytics on Postgres.

PostHog vs Umami — Side by Side

	PostHog	Umami
Category	Analytics	Analytics
What it is	Product analytics suite	Open-source web analytics
What it measures	Product events, replays, flags, errors	Website traffic and events
Self-hosting	Hobby deploy (about 100K events a month)	Yes (MIT, PostgreSQL)
How you pay	Free allowance, then per-product usage	Free, or monthly plan plus per-event overage
Free access	1M events and 5K recordings a month	100,000 events a month (Hobby)
Pricing	Free · then usage-based	Free · paid from $20/mo
Starting price	Free tier available	Free tier available
Free tier
Best for	Analytics — product analytics, session replay, feature flags	Analytics — open source, self-hosted, free tier

Pros & Cons

PostHog

Free monthly allowance: 1M events and 5,000 recordings
Analytics, replay, flags and error tracking in one tool
Billing limit per product

Usage is billed separately for each product
Self-hosted hobby deploy suits about 100,000 events a month
Free plan keeps 1 year of data and 1 project

Umami

MIT licensed and self-hostable
Free tier covers 100k monthly events
Usage overage instead of forced upgrades

Self-hosting means running a database
Fewer advanced reports

Key Features Compared

PostHog

Free every month: 1M analytics events, 5,000 session recordings, 1M feature flag requests
Also free monthly: 100,000 error-tracking exceptions and 1,500 survey responses
Usage above the free allowance is billed per product, with a billing limit per product
Paid plans keep events 7 years (1 year on free) and allow 6 projects (1 on free)
Open source under MIT, except the ee directory; self-hosted hobby deployments suit about 100,000 events a month

Umami

Hobby (free cloud): 100,000 events a month, 1 website, 6 months of data
Pro $20 a month: 1M events, up to 20 websites, up to 10 team members, 2 years of data
Pro overage: $0.00003 per extra event
Business $200 a month: 10M events, unlimited websites and members, 5 years of data
Open source under the MIT license; self-hosting needs PostgreSQL v12.14+
Cloud adds email reports and a streaming API that self-hosting lacks

Choose PostHog if…

You want product analytics, session replay and feature flags without stitching three tools together.
You want a free tier that resets monthly, with or without a card on file.
You want to cap spend per product with billing limits.

PostHog review & pricing

Choose Umami if…

You want to self-host free, MIT-licensed analytics on Postgres.
You want a free hosted plan for one site.
You want usage-based overage rather than jumping to a bigger plan.

Umami review & pricing

Frequently Asked Questions

Is PostHog better than Umami?⌄

What is the difference between PostHog and Umami?⌄

What it is — PostHog: Product analytics suite. Umami: Open-source web analytics. What it measures — PostHog: Product events, replays, flags, errors. Umami: Website traffic and events. Self-hosting — PostHog: Hobby deploy (about 100K events a month). Umami: Yes (MIT, PostgreSQL). How you pay — PostHog: Free allowance, then per-product usage. Umami: Free, or monthly plan plus per-event overage. Free access — PostHog: 1M events and 5K recordings a month. Umami: 100,000 events a month (Hobby).

PostHog vs Umami: which is cheaper?⌄

PostHog pricing: Free · then usage-based. Umami pricing: Free · paid from $20/mo. Confirm current pricing on each tool's official site, as plans change.

When should I skip both PostHog and Umami?⌄

Skip PostHog if you only need simple website traffic stats. Plausible and Fathom are simpler. Skip Umami if you want funnels and ecommerce revenue on an entry plan. Plausible Business includes both.

Sources · tool facts checked November 2026