Bugsnag

Bugsnag is an error monitoring and application stability platform that automatically detects, diagnoses, and prioritizes software errors across web, mobile, and backend applications. Unlike traditional error trackers that overwhelm teams with noise, Bugsnag uses stability scores and impact analysis to surface errors affecting the most users or revenue-critical features. With breadcrumbs, diagnostics, and release tracking, teams fix issues faster.

Best for: Mobile and web development teams that need stability-focused error tracking with business impact prioritization. Particularly valuable for apps with millions of users where you need to understand which errors affect the most people, or for teams that deploy frequently and need to quickly identify regressions in new releases. Strong mobile support for iOS, Android, and cross-platform frameworks.

Common Questions

What is Bugsnag's stability score?
Bugsnag calculates a stability score (percentage of error-free sessions) for each release and feature. A score of 99.5% means 99.5% of user sessions had zero errors. This metric helps teams understand overall application health and identify which releases degraded stability. Scores are tracked over time and can trigger alerts when they drop below thresholds.

What platforms does Bugsnag support?
Bugsnag supports JavaScript, React, Vue, Angular, Node.js, Python, Ruby, PHP, Java, Kotlin, .NET, C#, Go, iOS (Swift, Objective-C), Android, React Native, Flutter, Unity, Xamarin, Electron, and more. Both frontend and backend errors are captured with full context, including device information, custom metadata, and user attributes.

How does Bugsnag prioritize errors?
Bugsnag prioritizes errors based on number of affected users, error frequency, and release recency. Errors affecting 10,000 users appear before errors affecting 5 users, even if the latter occurs more frequently. You can also set custom severity levels and filter by release stage (production vs. development) to focus on what matters most.

Does Bugsnag provide crash reporting for mobile apps?
Yes, Bugsnag excels at mobile crash reporting for iOS and Android with automatic symbolication (mapping obfuscated stack traces to readable code). It captures device model, OS version, memory state, battery level, network connectivity, and custom breadcrumbs leading up to the crash. React Native and Flutter are fully supported with platform-specific diagnostics.

Pricing & Plans

• Free: 7,500 errors/month, 30-day retention, 7-day data retention, 1 project
• Standard: $59/month for 25,000 errors/month, 90-day retention, 5 projects, unlimited users
• Pro: $199/month for 100,000 errors/month, 180-day retention, 15 projects, advanced features
• Enterprise: Custom pricing for millions of errors, unlimited projects, priority support, SAML/SSO

Annual billing available with discount. Additional errors available in blocks.

Limitations

• Error event limits: High-traffic applications or those with noisy third-party errors can quickly consume monthly error quotas. Requires careful filtering and rate limiting configuration.
• Limited performance monitoring: Bugsnag focuses on errors and stability, not full application performance monitoring (APM). No transaction tracing or database query monitoring—pair with dedicated APM tools.
• Mobile-first design: While backend support is solid, Bugsnag's feature set and UI are optimized for mobile app use cases. Server-side-only teams might find other tools (Sentry, Rollbar) more tailored to their workflows.

Getting Started

1. Sign up at bugsnag.com (free tier available, no credit card required)
2. Create a project and select your platform (React Native, Python, etc.)
3. Install the Bugsnag SDK via npm, CocoaPods, Gradle, or your package manager
4. Initialize Bugsnag in your application code with your API key
5. For mobile, upload symbol files (dSYMs for iOS, ProGuard mappings for Android) for readable stack traces
6. Deploy and errors will begin appearing with stability scores
7. Configure release stages to separate production from development errors

The free tier (7,500 errors/month) works well for small apps. Use Bugsnag's release tracking to correlate errors with deployments and quickly identify regressions.