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TL;DR: Rehearsals builds AI digital twins of your customers, watches every session automatically, and turns behavior into validated recommendations and ready-to-share research. Amplitude is a traditional analytics platform for teams who want to do the manual work of instrumenting data, building dashboards, and spending analyst time interpreting what the numbers mean.

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The only AI research team that watches every session for you

Rehearsals is an AI research and data science platform that does the work of an entire user research team. After adding a one-line script on your website, Rehearsals watches every session replay, understands why users pay and why they churn, and tells you exactly what you need to do next. This behavioral context powers AI digital twins, scientifically built replicas of your customers based on behavioral and preference data, that predict how pricing changes, design iterations, and messaging will perform before you ship. Amplitude, by contrast, is a product analytics and experimentation platform built around manual event tracking. While it offers autocapture and visual labeling, you’re still defining events and waiting for data to accumulate before making decisions. Its charts and dashboards show you what happened, but you’ll need to hire analysts to figure out what it means and what to do about it.

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Key Differentiators

Unlimited Session Replays

Rehearsals: Every visit recorded automatically with no capsAmplitude: 1k recordings/month on Starter tier, 10k on Plus, then requires custom enterprise pricing

AI Digital Twins

Rehearsals: Test pricing, copy, and features before shipping, powered by scientifically built digital twins of your customersAmplitude: AI assistant runs queries and creates charts, but doesn’t predict how customers will respond to changes

Retroactive Event Tracking

Rehearsals: Define any event in plain English and instantly get weeks of historical data from past session replaysAmplitude: Still requires defining events and properties, then waiting for data to accumulate

Revenue Opportunities, Delivered Daily

Rehearsals: AI surfaces pricing optimizations, copy improvements, and funnel fixes automaticallyAmplitude: You build dashboards and do the analysis yourself

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What Makes Rehearsals Different Than Amplitude?

Unlimited Session Replays

Rehearsals automatically records every visit with no caps, so you always have a complete picture.Amplitude caps recordings at 1,000 per month on the free tier and 10,000 on Plus plans. For high-traffic sites, you’ll quickly hit these limits and need custom enterprise pricing. You’ll never have complete coverage of your users’ journeys.
Our digital twins are scientifically built replicas of your customers based on behavioral and preference data collected from every session. They recreate each user’s decision process to test new features, copy, or pricing without waiting for live data.These digital twins simulate how real users would respond to changes, letting you validate ideas before shipping. Amplitude’s AI assistant helps you query existing data and build charts faster, but it can’t predict how customers will respond to changes you haven’t made yet. You’re left guessing until you ship to production.
Need to track something new? Describe it as if you were talking to a coworker and Rehearsals will instantly extract that data from weeks of historical session replays. No code changes required.
Example: "Extract the total cart value when users click checkout"
With Amplitude, even with autocapture and visual labeling, you’re still defining events and properties, then waiting for data to accumulate. Autocapture tracks clicks and form submissions but still requires you to label what matters. For custom behaviors, you need to instrument events, deploy to production, then wait 2+ weeks to collect enough data to make decisions. With Rehearsals, you describe what you want and get historical data instantly.
Ask your hardest strategic questions and Rehearsals will watch hundreds of sessions, synthesize behavioral data and user preferences, and deliver fully cited research briefs and slide decks. We focus on the three critical business outcomes: optimizing pricing strategy, improving advertising and messaging copy, and identifying product feature and conversion funnel improvements.
Example question: “Why are users abandoning checkout, and what should we test next?”
Rehearsals provides comprehensive answers backed by session evidence, complete with presentation-ready slides. Amplitude shows you the data in charts and dashboards but doesn’t interpret it. You’ll need to hire analysts or consultants to do this work.
Our Radar continuously scans user behavior to surface high-impact revenue opportunities your team might miss. Every day you get a feed of snackable, actionable insights discovered by AI, things you wouldn’t have known to look for.Amplitude requires you to manually set up dashboards, define metrics, and build alerts for everything you can think of. There’s no proactive scanning, so you only find what you already knew to look for.
Upload strategy decks, business goals, or target personas and Rehearsals’ AI will keep them in mind when analyzing sessions and answering questions, ensuring every recommendation aligns with your priorities.This contextual awareness means every insight is tailored to your specific business objectives. Amplitude is a generic analytics tool that treats every user the same way and requires you to remember your business context.

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Where Amplitude Falls Short

While Amplitude offers solid analytics tools, it lacks the AI-powered intelligence and automation that makes Rehearsals transformative.

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Limited Session Coverage

Amplitude caps session replays at 1,000 per month on the free tier and 10,000 on Plus plans. For growing teams, these limits mean you’re only seeing a fraction of your users’ journeys, and scaling up requires expensive enterprise contracts.

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Event Tracking Still Required

Even with autocapture and visual labeling, you’re still in the business of defining events and properties. Autocapture collects raw clicks and form submissions, but you must label what matters and build your taxonomy. For anything beyond basic interactions, you’re writing code and deploying updates before you can analyze. 
// Amplitude still requires event instrumentation
amplitude.track('checkout_completed', {
  cart_value: 99.99,
  items_count: 3
})

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Charts Over Actions

Amplitude visualizes data with funnels, cohorts, and retention charts (which looks great in a meeting) but it doesn’t tell you what to do about it. You still need to hire data analysts, user researchers, and consultants to interpret the data, run user interviews, and develop recommendations. Rehearsals, on the other hand, surfaces actionable next steps automatically: specific pricing adjustments to test, messaging copy that will resonate, and product features that will move conversion. It’s the difference between seeing a chart and getting a roadmap.

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No Proactive Intelligence

You’re responsible for setting up dashboards, defining metrics, and monitoring alerts. Amplitude’s AI assistant helps you query data faster, but there’s no AI scanning user journeys for patterns or missed opportunities you didn’t think to look for. If you don’t know to ask the question, Amplitude won’t surface the answer.

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Setup Comparison

<!-- Drop this in your <head> tag and you're done -->
<script src="https://app.runrehearsals.com/recorder.js" async></script>
Rehearsals: Sessions start recording immediately; revisit any moment and ask new questions without changing code.

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Side-by-Side Feature Comparison

FeatureRehearsalsAmplitude
Session Replay✅ Unlimited, automatic⚠️ Limited (1k-10k/mo)
AI Analysis✅ Watches & learns from every session❌ Query assistant for captured data only
Event Tracking✅ Zero-code, describe in plain English❌ Still requires defining events & properties
Digital Twins✅ Test pricing, copy & features before shipping❌ Not available
Actionable Recommendations✅ Daily AI-discovered revenue opportunities❌ Manual dashboard setup & analysis
Strategic Research & Slides✅ AI-generated briefs with presentation decks❌ Self-service analysis only
Business Context Awareness✅ Learns your goals & strategy❌ Generic analytics
Setup Complexity✅ One-line script⚠️ Script + event instrumentation + replay plugin
Cost ModelFixed pricing, unlimited usagePay per MTU/event/recording

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Choose the AI-Powered Future

For Teams Who Want Intelligence

Choose Rehearsals if you want to free your team from endless tagging and dashboard building. Get unlimited session coverage, AI-powered recommendations on pricing strategy, advertising copy optimization, and product funnel improvements, all without extra engineering work or hiring consultants.

For DIY Analytics

Choose Amplitude if you prefer full control and have engineering resources to instrument events, build dashboards, and manually analyze data. Good for teams with dedicated data analysts who want feature flags and experiments.
Ready to see the difference? Try Rehearsals and turn every session into actionable intelligence. No instrumentation required.