Kuoll vs Sentry vs TrackJS

Real-Time Updates: For the first time, developers can fix code-level issues anywhere in the stack well before users even encounter an error.;Complete Context: Spend more time where it matters, rather than investing in low-impact issues.;Integrate Everywhere: Drop-in integration for every major platform, framework, and language -- JavaScript, Python, PHP, Ruby, Node, Java, .NET, mobile.;Root Cause: See the events that lead to errors so you always debug the right thing the first time.;Private & Secure: Sentry is SOC-2 compliant with GDPR, PCI DSS, HIPAA, and Privacy Shield by default.;Open Source: Sentry is 100% open source and available on GitHub.

Telemetry Timeline: More than just an error. The Telemetry Timeline shows the user, network, and console events that preceded an error, like an airplane's BlackBox for your webapp.;Realtime Dashboard: Compare the hits and errors for your webapp over time. See if a recent change is causing failures, and where to prioritize debugging.;Intelligence Alerting: Get notified when issues important to you are happening, right to your email or chat room.;Sourcemaps: Apply a private sourcemap to any stacktrace and see real functionnames and files, along with inline code snippets;Applications: Setup TrackJS on multiple environments or applications for easy comparison;

Revenue loss reports - Take an overview of your revenue losses. Navigate down to specific issues (such as checkout errors) and user sessions. Fix bugs to get your revenues back.; Data analytics - Analyze missed profits with the detailed data provided, including user events, network error codes, their descriptions, etc.; Timely alerts - Keep your dev team up to date on production status. Smart, no-spam alerts allow developers to fix critical issues ASAP.; Steps to reproduce - User session steps provide insights on how to reproduce a particular problem on a e-commerce server or front-end. DOM snapshots and XmlHttpRequest calls allow investigating issues even further.