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 PostHog: Which is Better in 2026?

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Analytics

Choosing between Amplitude and PostHog? 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.

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

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 PostHog if you want product analytics, session replay and feature flags without stitching three tools together.

Amplitude vs PostHog — Side by Side

	Amplitude	PostHog
Category	Analytics	Analytics
What it is	Product analytics platform	Product analytics suite
What it measures	User behaviour, cohorts, experiments	Product events, replays, flags, errors
Self-hosting	No (hosted)	Hobby deploy (about 100K events a month)
How you pay	Free tier, then event-based plans	Free allowance, then per-product usage
Free access	2M events and 10K replays a month	1M events and 5K recordings a month
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 — product analytics, session replay, feature flags

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

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

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

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

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 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

Frequently Asked Questions

Is Amplitude better than PostHog?⌄

What is the difference between Amplitude and PostHog?⌄

What it is — Amplitude: Product analytics platform. PostHog: Product analytics suite. What it measures — Amplitude: User behaviour, cohorts, experiments. PostHog: Product events, replays, flags, errors. Self-hosting — Amplitude: No (hosted). PostHog: Hobby deploy (about 100K events a month). How you pay — Amplitude: Free tier, then event-based plans. PostHog: Free allowance, then per-product usage. Free access — Amplitude: 2M events and 10K replays a month. PostHog: 1M events and 5K recordings a month.

Amplitude vs PostHog: which is cheaper?⌄

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

When should I skip both Amplitude and PostHog?⌄

Skip Amplitude if you want published per-event prices at every tier. Mixpanel lists Growth prices up to 20M events. Skip PostHog if you only need simple website traffic stats. Plausible and Fathom are simpler.

Sources · tool facts checked November 2026