Signups go up. Paying customers don’t.
Stop guessing where users leak.
Traditional analytics gives you useless brochure metrics. MetricTrail connects real visitor journeys, automatic React Error Boundary diagnostics, and Core Web Vitals into one blazing-fast, real-time dashboard.
Live Visitor Journeys
Real-Time Visitor StreamYou’re not bad with data. Your analytics was built for someone else.
GA4, Plausible, and traditional tools were created for marketing teams tracking brochure pageviews. You have a SaaS product, measured by user activation, system performance, and code issues that block revenue.
Vanity pageviews and 24h delays
You open the dashboard, see high-level bounce rates, and close the tab 10 seconds later because it never answers what you came to ask.
A person behind every metric
Every signup becomes a chronological journey: where they arrived from, every screen they viewed, the exact error that stopped them, and who subscribed.
The 6 pillars that set MetricTrail apart.
We took the best parts of product analytics, web vitals monitoring, and error tracking, and fused them into a single, unified real-time architecture.
Ultra-Lightweight (<5KB)
A fraction of the size of GA4, Mixpanel, or PostHog. Zero external dependencies. Loads asynchronously without blocking the DOM or hurting your Core Web Vitals.
Real-Time Speed
Query billions of unaggregated events in milliseconds. No data sampling, no 24-hour waiting periods. What happens in your app appears live on your screen.
Auto Error Boundary & RUM
Catch uncaught exceptions and unhandled Promise rejections automatically. Every crash is mapped to the user’s previous 5 actions so you can reproduce it in seconds.
Real User Core Web Vitals
Automatic Real User Monitoring (RUM) measuring P75 LCP, INP, CLS, and TTFB per page route. Instantly identify when a slow route causes visitors to bounce.
Channel Attribution & ROI
Track which channel actually brings paying customers instead of vanity clicks. Automatic classification for Direct, Google, X/Twitter, Instagram, LinkedIn, and UTM campaigns.
100% Cookieless & GDPR
No cookies, no local storage tracking across domains, and zero personal data leakage. Compliant with GDPR, CCPA, and PECR out-of-the-box. Raw data export and full workspace deletion, self-serve, in one click — no support ticket needed.
A complete platform, not just a tracking snippet.
Every module you need to understand your product end to end, without stitching together six different tools and six different invoices.
Natural-Language AI Insights
Ask your data plain-English questions like "why did conversion drop on Tuesday?" MetricTrail uses Google Gemini to answer with real evidence from your events, plus proactive insights you never had to ask for.
MCP Server for AI Tools
Connect Cursor, Claude Desktop, or Antigravity straight to your data via Model Context Protocol. Your coding copilot can query sessions, traffic, and errors without leaving the editor.
Session Explorer
Reconstruct any visitor’s full journey: every screen, every click, every error, in chronological order. Stop guessing what happened and just watch it.
Conversion Funnels
Define multi-step funnels and find exactly where users drop off, with automatic period-over-period comparison.
Issues, Event Catalog & Releases
Errors auto-grouped into triageable issues with stack traces, a searchable catalog of every event type you’ve ever captured, and metric comparisons across app releases.
Revenue Analytics
Track events like purchase_completed and see total revenue, average order value, and channel breakdown — without bolting on a separate e-commerce analytics tool.
One tag, two minutes, and the leak shows up.
Drop the script into your React, Next.js, or HTML app. In minutes, live visitor journeys and performance signals start streaming into your dashboard.
// 1. Install our tiny <5KB SDK
npm install @metrictrail/react
// 2. Wrap your Next.js / React root layout
import { MetricTrailProvider } from '@metrictrail/react';
export default function RootLayout({ children }) {
return (
<MetricTrailProvider
writeKey="mt_live_k82f91a0c7e2..."
autoWebVitals={true}
autoErrorBoundary={true}
>
{children}
</MetricTrailProvider>
);
}How MetricTrail compares against the alternatives.
Built specifically for modern SaaS developers who need truth over bloated marketing reports.
| Feature / Capability | MetricTrail | Google Analytics 4 | PostHog | Plausible |
|---|---|---|---|---|
| SDK Bundle Size | < 5 KB | ~85 KB | > 120 KB | ~1.4 KB |
| Data Latency (Real-time) | Real-time, no batch delay | 24 - 48 Hours | 5 - 15 Seconds | 1 - 5 Seconds |
| React Error Boundary Tracking | Native Auto-Capture | None | Heavy Sentry Plugin | None |
| Real User Core Web Vitals (RUM) | Built-in P75 LCP/INP/CLS | Limited / Partial | Separate Plugin | None |
| Cookieless / No GDPR Banner | 100% Compliant | Requires Banner | Configurable | 100% Compliant |
| Individual Visitor Timelines | Full Journey Stream | Aggregated only | Available | Aggregated only |
| Channel ROI & Comparative Deltas | Built-in (▲ +X%) | Complex attribution | Manual setup | Basic referrers |
| AI Natural Language Insights | Included (Pro & Scale) | None | Add-on / Heavy | None |
Simple pricing. No surprises.
Every plan starts with a 7-day free trial. Upgrade, downgrade, or cancel yourself from the dashboard — no support ticket needed. Powered by global Merchant of Record with automated sales tax and VAT compliance worldwide.