---
title: "Amplitude vs GA4: different jobs, different tools"
canonical_url: https://ampl.webclat.com/compare/amplitude-vs-google-analytics
description: "Amplitude vs GA4: different jobs, different tools. Marketing attribution vs product analytics, sampling and retention limits, and when to run both."
source: Webclat | Amplitude Solutions (official Amplitude partner, independent consultancy)
---

# Amplitude vs GA4: different jobs, different tools

GA4 is a marketing-analytics tool that speaks some product analytics; Amplitude is a product-analytics tool that doesn't pretend to do ads attribution. Most teams comparing them actually need to split the job.

## Verdict

Keep GA4 for what it is genuinely good at - acquisition reporting and the ads ecosystem - and adopt Amplitude when product questions (retention, feature adoption, funnels your PMs self-serve) become decisions rather than curiosities. The teams unhappiest with GA4 are the ones asking it product questions; the answer is rarely 'configure GA4 harder.'

## Comparison

| Dimension | Amplitude | Google Analytics 4 |
| --- | --- | --- |
| Built for | Product behavior: retention, funnels, cohorts | Marketing: acquisition, attribution, ads integration |
| Sampling | Unsampled analysis | Sampling on complex explorations at volume |
| Data retention | Plan-based (2yr on Plus; longer on upper tiers) | User-level explorations capped at 2-14 months on standard properties (GA360 extends to 50); aggregates longer |
| Self-serve for PMs | Core design goal | Explorations exist; adoption outside analysts is notoriously low |
| Ads ecosystem | Not the job | Native, unmatched (Google Ads, Search Console) |
| Price | Free to 2M events/mo, then tiered | Free (GA360 for enterprise contracts) |

## When Amplitude is the right call

- Product decisions ride on retention, funnels, and feature adoption
- PMs should self-serve answers without an analyst queue
- Sampling or retention limits have burned you in a real meeting

## When Google Analytics 4 is the right call

- Acquisition and campaign reporting is the whole job
- The ads ecosystem integration is non-negotiable
- Budget is zero and the questions are marketing-shaped

## FAQ

### Should I replace GA4 with Amplitude?

Usually 'add', not 'replace': GA4 keeps acquisition and ads reporting, Amplitude takes product analytics. Fully replacing GA4 makes sense mainly when you don't run meaningful paid acquisition. Define which questions live in which tool - the failure mode is two tools competing to answer the same metric differently.

### Why do product teams leave GA4?

Four reasons we hear on repeat: sampling on the analyses that matter, user-level retention limits that delete history, an Explorations UX that PMs won't self-serve in, and thresholding that hides small segments. These are structural to GA4's design center - marketing analytics - not configuration mistakes.

### Is Amplitude harder to set up than GA4?

It is more deliberate. GA4's auto-collection gets numbers flowing instantly; Amplitude expects a designed event taxonomy. That upfront design is precisely why Amplitude data stays trustworthy - and if you skip it, you recreate GA4-grade chaos in a more expensive tool. Our GA4-to-Amplitude migration page covers the path, including what to do with your history.