Error tracking is one of the few categories where two tools genuinely compete head to head, and this is that comparison. Both catch exceptions, group them and give you enough context to fix them. Sentry, founded in 2012, is the broader product: full stack traces, source map support for frontend JavaScript, AI-suggested fixes through Autofix, and real user monitoring beside the error inbox. Bugsnag, from 2013, is narrower and organised around releases, with stability scores per version, good iOS, Android and React Native SDK coverage, and an inbox that carries device and breadcrumb context. The free tiers run counter to expectation: Bugsnag gives 7,500 events a month, Sentry 5,000 errors.
Pick Sentry if you want one tool covering errors across a mixed stack. It is the stronger option on frontend source maps, and Bugsnag's performance monitoring is the thinner of the two. Pick Bugsnag if you ship mobile releases and want a stability number to hold releases against, and note its Team plan starts around $22 a month against Sentry's $26. Whichever you pick, run a month of real traffic before signing anything annual: Sentry's pricing jumps quickly at volume and Bugsnag's climbs fast once you clear the event quota, so headline tier prices stop meaning much after that. Both need noise tuning too, or the inbox stops getting read.
Application error monitoring and performance management
Pricing: Developer (Free - 5k errors), Team from ~$26/mo, Business from ~$80/mo
Founded: 2012
Best for: Developers, Frontend Teams, Backend Engineers
Error monitoring with stability scoring, built mainly around mobile and web apps
Pricing: Free tier (7,500 events/mo), Team from ~$22/mo
Founded: 2013
Best for: Mobile Engineers, Frontend Teams, Release Managers
1 of 18 capabilities separate these two. Those come first.
| Feature | Sentry | Bugsnag |
|---|---|---|
| Where they differ (1) | ||
| Uptime Monitoring | Sentry: yes | Bugsnag: no |
| Both tools have (9) | ||
| Real User Monitoring | Sentry: yes | Bugsnag: yes |
| AI-Powered | Sentry: yes | Bugsnag: yes |
| Alerting | Sentry: yes | Bugsnag: yes |
| Slack Integration | Sentry: yes | Bugsnag: yes |
| CI/CD Integration | Sentry: yes | Bugsnag: yes |
| On-Premise / Self-Host | Sentry: yes | Bugsnag: yes |
| Free Tier | Sentry: yes | Bugsnag: yes |
| API Access | Sentry: yes | Bugsnag: yes |
| Dashboards | Sentry: yes | Bugsnag: yes |
| Neither tool has (8) | ||
| Synthetic Monitoring | Sentry: no | Bugsnag: no |
| API & Browser Testing | Sentry: no | Bugsnag: no |
| Self-Healing Tests | Sentry: no | Bugsnag: no |
| Multi-Location Checks | Sentry: no | Bugsnag: no |
| SSL Monitoring | Sentry: no | Bugsnag: no |
| Status Page | Sentry: no | Bugsnag: no |
| Open Source | Sentry: no | Bugsnag: no |
| Incident Management | Sentry: no | Bugsnag: no |
Pros
Cons
Pros
Cons
Sentry is application error monitoring and performance management, while Bugsnag is error monitoring with stability scoring, built mainly around mobile and web apps. Sentry adds Uptime Monitoring on top of the shared feature set.
Sentry pricing: Developer (Free - 5k errors), Team from ~$26/mo, Business from ~$80/mo. Bugsnag pricing: Free tier (7,500 events/mo), Team from ~$22/mo. Evaluate against your check volume and team size; entry pricing rarely reflects total cost at scale.
Sentry is designed with Developers, Frontend Teams, and Backend Engineers in mind, whereas Bugsnag targets Mobile Engineers, Frontend Teams, and Release Managers. If your team matches the former profile, Sentry is usually the closer fit.
No. It does a different job. Error trackers tell you an exception fired. They can't see the failures that never throw: a checkout that silently breaks, an expired SSL certificate, a page that returns 200 and renders blank. ObserveOne monitors those user-facing journeys in production; teams run it alongside an error tracker, not instead of one.
Error trackers tell you an exception fired. They can't see the failures that never throw: a checkout that silently breaks, an expired SSL certificate, a page that returns 200 and renders blank. ObserveOne monitors those user-facing journeys in production; teams run it alongside an error tracker, not instead of one. The free tier covers enough to try it on one critical journey.
Each tool has its own alternatives page too, not just this matchup.