The Node.js monitoring toolkit you’ve been waiting for.

What if catching and understanding errors in your Node.js app was as easy as deploying it?With real-time error tracking, contextual debugging, session replay, and LLM-powered insights, Modulis has you covered.

Session Replay

Session Replay

Investigate hard-to-crack bugs by playing through issues in a youtube-like UI. With access to requests, console logs and more!

Error Monitoring

Error Monitoring

Continuously monitor errors and exceptions in your Node.js application, all the way from your frontend to your backend.

Performance Metrics

Performance Metrics

Monitor and set alerts for important performance metrics in Node.js like Web Vitals, Request latency, and much more!

LLM ANALYTICS

LLM ANALYTICS

If your application uses AI for chat, search, recommendations, or copilots, Modulis helps you understand how those AI features behave in production.

Reproduce issues with high-fidelity session replay.

Reproduce issues with high-fidelity session replay.

When an error happens, you shouldn’t be guessing what the user experienced.

  • Replay affected user interactions from start to finish
  • See clicks, navigation, input, and UI state leading up to an error
  • Understand context instantly without logs-only debugging
Know exactly when exceptions happen

Know exactly when exceptions happen

Modulis captures and categorizes Node.js errors in real time:

  • Uncaught exceptions
  • UI rendering errors
  • Promise rejections
  • Lifecycle failures
Monitor the Node.js metrics that matter

Monitor the Node.js metrics that matter

Modulis captures the performance signals that directly impact how users experience your Node.js app—so teams can optimize what matters, not chase vanity numbers.

  • Render & re-render timing to identify unnecessary component updates
  • User interaction latency across clicks, navigation, and inputs
  • Network request timing tied to UI state and user actions
  • Core Web Vitals (LCP, FID, CLS) mapped to real sessions
AI performance, usage, and cost—clearly tracked

AI performance, usage, and cost—clearly tracked

With the Modulis SDK, teams gain visibility into AI usage, performance, and cost—inside real user sessions.

  • Track usage by feature, user, or session
  • Measure latency and throughput
  • Monitor token consumption and cost trends
  • View AI interactions via session replay
  • Compare behavior across releases or prompts

See root cause in minutes, not hours.

Book a 30-minute demo — no commitment, no credit card. We'll show you exactly how Modulis works in your stack.

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