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.

AppsFlyer vs Umami: Which is Better in 2026?

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Analytics

Choosing between AppsFlyer 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.

AppsFlyer is for: Mobile app marketers who need to attribute installs and in-app actions to paid campaigns.

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 AppsFlyer if you run paid campaigns for a mobile app and need to know which ones drive installs. Choose Umami if you want to self-host free, MIT-licensed analytics on Postgres.

AppsFlyer vs Umami — Side by Side

	AppsFlyer	Umami
Category	Analytics	Analytics
What it is	Mobile attribution platform	Open-source web analytics
What it measures	Installs and conversions by campaign	Website traffic and events
Self-hosting	No (hosted)	Yes (MIT, PostgreSQL)
How you pay	Per conversion ($0.07 on Growth)	Free, or monthly plan plus per-event overage
Free access	12,000 conversions in the first year	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 — mobile attribution, paid campaigns, ROAS	Analytics — open source, self-hosted, free tier

Pros & Cons

AppsFlyer

Free Zero plan: 12,000 conversions in the first year
Pay-as-you-go Growth at $0.07 per conversion
Organic installs are not counted

Zero plan excludes apps with paid activities
Fraud protection is on Enterprise
Measures attribution, not product funnels

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

AppsFlyer

Zero (free): 12,000 free conversions in the first year; not for apps with paid activities
Growth: pay-as-you-go at $0.07 per conversion after the 12,000 free
Growth adds basic mobile attribution for paid campaigns
Enterprise: custom pricing with cross-channel attribution, ROAS optimization and fraud protection
Organic installs and actions are not counted and are free

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 AppsFlyer if…

You run paid campaigns for a mobile app and need to know which ones drive installs.
You want to start pay-as-you-go rather than sign an annual contract.
You need mobile fraud detection on an enterprise plan.

AppsFlyer 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 AppsFlyer better than Umami?⌄

What is the difference between AppsFlyer and Umami?⌄

What it is — AppsFlyer: Mobile attribution platform. Umami: Open-source web analytics. What it measures — AppsFlyer: Installs and conversions by campaign. Umami: Website traffic and events. Self-hosting — AppsFlyer: No (hosted). Umami: Yes (MIT, PostgreSQL). How you pay — AppsFlyer: Per conversion ($0.07 on Growth). Umami: Free, or monthly plan plus per-event overage. Free access — AppsFlyer: 12,000 conversions in the first year. Umami: 100,000 events a month (Hobby).

AppsFlyer vs Umami: which is cheaper?⌄

AppsFlyer 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 AppsFlyer and Umami?⌄

Skip AppsFlyer if you only need in-app usage analytics. Firebase Analytics is free. Skip Umami if you want funnels and ecommerce revenue on an entry plan. Plausible Business includes both.

Sources · tool facts checked November 2026