Bugsnag vs Prometheus

What Bugsnag is

Bugsnag monitors application errors and reports a stability score per release, so you can see whether a deploy made things worse. Grouping errors by release is what makes it useful in a deploy review: you can say whether the last ship raised the error rate rather than guessing. It is narrower than the full observability suites, so metrics and traces still come from somewhere else.

What Prometheus is

Prometheus scrapes metrics from your services and stores them as time series, with its own query language for alerting and dashboards.

What Bugsnag is built to do

Release health

Scores stability per release so a regression is visible after deploy.

Error grouping

Collapses duplicate exceptions into one issue with occurrence counts.

Breadcrumbs

Records the user actions leading up to an error for reproduction.

Choose Bugsnag if

• Teams that ship mobile or web releases and need to know if quality is slipping.

Choose Prometheus if

• Teams running services that need metrics and alerting they control.

Bugsnag: pros & cons

• Stability scores tie errors to releases
• Good mobile SDK coverage
• Clear grouping of duplicate errors
• Event pricing climbs with traffic
• Smaller ecosystem than Sentry
• Fewer performance features

Prometheus: pros & cons

• The de facto standard for metrics in Kubernetes
• Pull model means no agent pushing to you
• Free and open source
• Long-term storage needs an extra component
• PromQL takes time to learn
• Not built for logs or traces