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.

Amplitude vs Umami: Which is Better in 2026?

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Analytics

Choosing between Amplitude 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.

Amplitude is for: Product teams who want behavioural analytics with a large free event allowance and a path to experiments and governance.

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 Amplitude if you want a free plan with up to 2M events a month. Choose Umami if you want to self-host free, MIT-licensed analytics on Postgres.

Amplitude vs Umami — Side by Side

	Amplitude	Umami
Category	Analytics	Analytics
What it is	Product analytics platform	Open-source web analytics
What it measures	User behaviour, cohorts, experiments	Website traffic and events
Self-hosting	No (hosted)	Yes (MIT, PostgreSQL)
How you pay	Free tier, then event-based plans	Free, or monthly plan plus per-event overage
Free access	2M events and 10K replays a month	100,000 events a month (Hobby)
Pricing	Free · paid plans by quote	Free · paid from $20/mo
Starting price	Free tier available	Free tier available
Free tier
Best for	Analytics — product analytics, large free tier, experiments	Analytics — open source, self-hosted, free tier

Pros & Cons

Amplitude

Free plan covers 2M events a month
Plus starts at $0 for the first 2M events
Experiments and SSO on Growth

Growth and Enterprise prices are not listed
Free plan keeps 1 year of data and 10 saved charts

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

Amplitude

Free: 2M events a month, 10,000 session replays, 1 year of data access, 10 saved charts
Plus: starts at $0 with the first 2M events free, up to 70M events, heatmaps and 2-year data retention
Growth: custom, event-based pricing with SSO, A/B testing and 20,000 replays
Enterprise: custom, with RBAC, data access controls and 50,000 replays
Free includes AI agents, MCP and agent analytics

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 Amplitude if…

You want a free plan with up to 2M events a month.
You expect to need experiments, SSO and access controls as the team grows.
You want heatmaps alongside product analytics on a paid plan.

Amplitude 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 Amplitude better than Umami?⌄

What is the difference between Amplitude and Umami?⌄

What it is — Amplitude: Product analytics platform. Umami: Open-source web analytics. What it measures — Amplitude: User behaviour, cohorts, experiments. Umami: Website traffic and events. Self-hosting — Amplitude: No (hosted). Umami: Yes (MIT, PostgreSQL). How you pay — Amplitude: Free tier, then event-based plans. Umami: Free, or monthly plan plus per-event overage. Free access — Amplitude: 2M events and 10K replays a month. Umami: 100,000 events a month (Hobby).

Amplitude vs Umami: which is cheaper?⌄

Amplitude pricing: Free · paid plans by quote. Umami pricing: Free · paid from $20/mo. Confirm current pricing on each tool's official site, as plans change.

When should I skip both Amplitude and Umami?⌄

Skip Amplitude if you want published per-event prices at every tier. Mixpanel lists Growth prices up to 20M events. Skip Umami if you want funnels and ecommerce revenue on an entry plan. Plausible Business includes both.

Sources · tool facts checked November 2026