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 AppsFlyer: Which is Better in 2026?

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Analytics

Choosing between Amplitude and AppsFlyer? 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.

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

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 AppsFlyer if you run paid campaigns for a mobile app and need to know which ones drive installs.

Amplitude vs AppsFlyer — Side by Side

	Amplitude	AppsFlyer
Category	Analytics	Analytics
What it is	Product analytics platform	Mobile attribution platform
What it measures	User behaviour, cohorts, experiments	Installs and conversions by campaign
Self-hosting	No (hosted)	No (hosted)
How you pay	Free tier, then event-based plans	Per conversion ($0.07 on Growth)
Free access	2M events and 10K replays a month	12,000 conversions in the first year
Pricing	Free · paid plans by quote	Free · then usage-based
Starting price	Free tier available	Free tier available
Free tier
Best for	Analytics — product analytics, large free tier, experiments	Analytics — mobile attribution, paid campaigns, ROAS

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

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

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

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

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 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

Frequently Asked Questions

Is Amplitude better than AppsFlyer?⌄

What is the difference between Amplitude and AppsFlyer?⌄

What it is — Amplitude: Product analytics platform. AppsFlyer: Mobile attribution platform. What it measures — Amplitude: User behaviour, cohorts, experiments. AppsFlyer: Installs and conversions by campaign. How you pay — Amplitude: Free tier, then event-based plans. AppsFlyer: Per conversion ($0.07 on Growth). Free access — Amplitude: 2M events and 10K replays a month. AppsFlyer: 12,000 conversions in the first year.

Amplitude vs AppsFlyer: which is cheaper?⌄

Amplitude pricing: Free · paid plans by quote. AppsFlyer pricing: Free · then usage-based. Confirm current pricing on each tool's official site, as plans change.

When should I skip both Amplitude and AppsFlyer?⌄

Skip Amplitude if you want published per-event prices at every tier. Mixpanel lists Growth prices up to 20M events. Skip AppsFlyer if you only need in-app usage analytics. Firebase Analytics is free.

Sources · tool facts checked November 2026