Error Tracking platforms capture, deduplicate, and prioritize application exceptions and crashes across client (browser, mobile) and server environments — giving engineering teams a real-time, aggregated view of what is failing in production and for which users. Core capabilities include automatic error capture and stack-trace symbolication (including source-map resolution for minified JS), deduplication by error signature, impacted-user and release tagging, breadcrumb and context attachment (HTTP requests, state, user actions), trend and regression detection on releases, and integration with issue trackers and on-call tooling. The category overlaps with the broader Observability Platform market but focuses specifically on application-level errors rather than metrics, logs, or traces — and is most often adopted by developers directly rather than centrally mandated. Leading vendors include Sentry, Bugsnag (SmartBear), Rollbar, Raygun, Honeybadger, and AppSignal.