Real user monitoring for full-stack observability

Your APM traces tell you what happened on the server. Real user monitoring tells you what your users experienced in the browser. OpManager Nexus connects both, so you see the complete picture from the first click to the last database query, in one console.

Real user monitoring dashboard

Overview

OpManager Nexus extends full-stack observability to the browser. Real user monitoring (RUM) captures telemetry directly from actual user sessions, Core Web Vitals, JavaScript errors, resource timings, and session replay, and correlates it with the APM traces and infrastructure metrics already in your OpManager Nexus console. The result is complete end-to-end visibility from the user's first interaction to the server-side root cause, with no tool switching and no manual trace correlation.

See also
USER SESSIONS

Measure what users actually experience, not what your probes simulate

Synthetic tests prove your application is available. Real user monitoring tells you what users on real devices, real networks, and real geographies experience when it is working. OpManager Nexus captures telemetry from every actual user session and correlates it with the observability data you are already collecting.

  • Page load time segmented by geography, ISP, device, and browser so you know which user populations are experiencing degradation and why
  • AJAX and HTTP request timings capture every background call for response time and failure rate, per endpoint
  • Resource waterfall analysis breaks down load time per CSS, JavaScript, image, and third-party asset
  • Apdex scoring gives you a user-satisfaction index that translates performance data into a business-readable metric
  • Custom user attributes let you segment sessions by tenant ID, plan tier, user ID, or any dimension that maps to your business logic
Real user session performance
Session replay analysis
SESSION REPLAY

Reproduce any bug in seconds with session replay

When a user reports an issue your team cannot reproduce in a development environment, session replay shows exactly what they experienced. Pixel-accurate, video-like session recordings capture every click, scroll, form interaction, and navigation event in the production session, tied directly to the error event and APM trace that caused it.

  • Replays are tied to errors and performance events so you jump to the session where an exception fired or LCP exceeded threshold, without browsing recordings manually
  • Rage click, dead click, and error click detection surfaces UX friction automatically before it reaches your support queue
  • Privacy-safe by default, sensitive form fields, passwords, and PII are masked in all session recordings, configurable per field
  • Search by user ID or email to resolve support tickets with full production context and the exact session involved
CORE WEB VITALS

Track Core Web Vitals from every real user in production

Google uses Core Web Vitals as ranking signals. OpManager Nexus RUM captures LCP, INP, and CLS from actual user sessions and segments them by geography, browser, device, and ISP, giving you the field data that directly reflects how Google scores your application.

  • LCP, INP, and CLS tracked from every real session, segmented by any dimension in your user data
  • Threshold alerting fires when Core Web Vitals breach your SLO targets before the impact accumulates
  • Resource waterfall per metric shows which specific asset, script, or layout shift is responsible for each score
  • Long-term trend tracking measures the before-and-after impact of every performance optimization sprint
  • SPA route-level tracking supports React, Angular, Vue.js, and Next.js with per-route Core Web Vitals, not just aggregate page scores
Core Web Vitals monitoring
FULL-STACK CORRELATION

Connect a slow browser session to the backend query that caused it

Most RUM tools stop at the browser boundary. OpManager Nexus RUM connects directly to the distributed tracing, code profiling, and error tracking already in your application observability platform. When a user session shows a 4-second load, you pivot to the APM trace, identify the slow database query, and see the exact SQL, in one click.

  • Browser session to APM trace in one click, including every service, queue, and database call in the distributed trace
  • JavaScript error to server log, correlate a browser exception directly with the server log entry from the same request window
  • APM to infrastructure, the chain extends through APM to the underlying host, container, or Kubernetes pod metrics
  • Shared dashboards, frontend, backend, and SRE teams work from the same data in the same console
Browser session RUM JS error APM trace Server log DB query Infra metrics

All correlated automatically. No manual timestamp matching required.

BROWSER ERRORS

See every browser error before your users do

OpManager Nexus captures every unhandled JavaScript exception, AJAX failure, and resource timeout from real user sessions. Source map support de-obfuscates minified production code so stack traces point to your original source file. Every error links directly to the session replay showing the exact user interaction that triggered it.

  • Source map support for human-readable stack traces in production, pointing to the original file and line without a reproduction environment
  • Automatic error grouping clusters related exceptions by root cause so you see ten distinct problems instead of ten thousand individual events
  • Third-party script isolation identifies which external tag, ad script, or CDN asset is causing silent failures or performance regressions
  • Release attribution tags errors to the deployment that introduced them so regressions surface within minutes of rollout
  • Affected user count shows how many users encountered each error group, not just how many times it fired
Browser error report

Works with every framework, library, and infrastructure layer you already use

OpManager Nexus RUM supports every major frontend framework and mobile platform, out of the box, with a lightweight JavaScript snippet and no proprietary agents required.

Frontend frameworks

  • React
  • Angular
  • Vue.js
  • Next.js
  • Nuxt.js
  • Svelte
  • Remix
  • Ember.js

Mobile platforms

  • iOS (Swift)
  • Android (Kotlin/Java)
  • React Native
  • Flutter
  • Ionic
  • Cordova
  • Progressive Web Apps

Backend correlation

  • Java (Spring Boot)
  • Python (Django, FastAPI)
  • Node.js (Express, NestJS)
  • Go (Gin)
  • .NET
  • Ruby (Rails)
  • PHP (Laravel)

Infrastructure

  • Kubernetes
  • Docker
  • AWS / EKS / Lambda
  • Azure / AKS
  • GCP / GKE / Cloud Run
  • Bare metal / VMs

Alerting and incident response

  • Zoho Cliq
  • Slack
  • Microsoft Teams
  • Jira
  • ServiceNow
  • PagerDuty
  • Webhooks

Why OpManager Nexus RUM is different from a standalone tool

Standalone RUM tools show you that users are experiencing slowness. OpManager Nexus shows you why, because the browser data and the backend data live in the same platform.

Full-stack in one console

Full-stack in one console

Browser session, APM trace, server log, database query, and infrastructure metrics, all correlated automatically. No manual timestamp matching. No tool switching during incidents.

Production context, not lab data

Production context, not lab data

Real sessions across real geographies, devices, ISPs, and network conditions. RUM captures what users actually experience when your application is running, not what probes simulate from controlled locations.

Open standards, no lock-in

Open standards, no lock-in

OpManager Nexus RUM is built on OpenTelemetry from the ground up. Instrument once with the OTel SDK. Your telemetry is portable and your instrumentation effort is reusable across vendors.

Privacy by default

Privacy by default

GDPR, HIPAA, CCPA, ISO 27001, and SOC 2 Type II compliant. Session replays mask sensitive fields automatically. EU data center options available. No PII is ever captured in raw form.

FAQ

How does OpManager Nexus RUM differ from a standalone real user monitoring tool?

The fundamental difference is that OpManager Nexus RUM is natively integrated with APM, infrastructure monitoring, and log management in the same platform. When a real user session shows a slow page load or a JavaScript error, you pivot directly to the distributed APM trace and the database query that caused it, without leaving the console or manually correlating data across separate tools.

Standalone RUM tools capture the browser-side signal but leave the root cause investigation to a different product. OpManager Nexus closes that gap by design.

Do I need a separate RUM agent if I have already instrumented my backend with the OpManager Nexus APM agent?

No additional backend configuration is required. Add the lightweight RUM JavaScript snippet to your page head and OpManager Nexus correlates browser sessions with the APM traces your existing agent is already generating. The correlation is automatic, using trace context propagation, without any additional configuration on the backend side.

If your team is using OpenTelemetry instrumentation, OpManager Nexus accepts OTLP natively, so your existing OTel setup works as-is.

How long does it take to get real user monitoring data flowing in production?

Most teams see live RUM data within 30 minutes of starting setup. Add the JavaScript snippet to your common layout file and data begins flowing from the first real user visit. For single-page applications built with React, Angular, or Vue.js, route-level tracking is automatic with no additional configuration needed to capture virtual page navigations.

What Core Web Vitals does OpManager Nexus RUM track?

OpManager Nexus RUM tracks all three Google Core Web Vitals from real user sessions: Largest Contentful Paint (LCP), Interaction to Next Paint (INP, which replaced First Input Delay), and Cumulative Layout Shift (CLS). Each metric is segmented by geography, browser, device type, and ISP, so you can pinpoint exactly which user populations fall below Google's recommended thresholds.

Does OpManager Nexus RUM work for microservices architectures with multiple backend services?

Yes. This is the environment OpManager Nexus is designed for. A single browser session can trigger calls to dozens of backend services written in different languages. OpManager Nexus propagates trace context automatically across service boundaries, so the full distributed trace from the browser request through every downstream service, queue, and database call appears in a single waterfall view.

Dependency maps are built from live trace data, so the topology reflects your actual running architecture, not a manually maintained service catalog.

Is OpManager Nexus RUM compliant with GDPR, HIPAA, and data residency requirements?

Yes. OpManager Nexus RUM complies with GDPR, HIPAA, CCPA, ISO 27001, and SOC 2 Type II. All data is transmitted over TLS and stored in geographically distributed, certified data centers. Session replays include configurable masking for sensitive inputs, form fields, and PII. EU-based data center options are available for organizations with data residency requirements.

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