Sentry vs Firebase
Application monitoring, error tracking, tracing, session replay
vs. Google's mobile & web app development platform
Pricing tiers
Sentry
Developer (Free)
Single user. 5k errors + 5M spans + 5GB logs + 50 replays + 1GB attachments per month.
Free
Self-Hosted (OSS)
BSL-licensed. Docker-based deploy. Free for personal/internal, commercial requires license.
$0 base (usage-based)
Team
$26/mo annual ($29/mo). Unlimited users. 50k errors/mo. 20 custom dashboards. Third-party integrations.
$26/mo
Business
$80/mo annual. 90-day insights lookback, unlimited dashboards, anomaly-detection alerts, SAML + SCIM.
$80/mo
Enterprise
Custom. Dedicated TAM, premium support, single-tenant option.
Custom
Firebase
Spark (No-cost)
Free tier with generous quotas. No credit card required. Cannot exceed free quotas.
Free
Blaze (Pay as you go)
Usage-based billing. Includes Spark quotas free, then pay Google Cloud rates. Required for Cloud Functions outbound networking, scheduled jobs, some extensions.
Custom
Free-tier quotas head-to-head
Comparing self-hosted on Sentry vs spark on Firebase.
| Metric | Sentry | Firebase |
|---|---|---|
| auth mau | — | 50000 users/month |
| firestore deletes per day | — | 20000 docs/day |
| firestore egress gib month | — | 10 GiB/month |
| firestore reads per day | — | 50000 docs/day |
| firestore storage gib | — | 1 GiB |
| firestore writes per day | — | 20000 docs/day |
| functions cpu seconds | — | 200000 CPU-sec/month |
| functions gb seconds | — | 400000 GB-sec/month |
| functions invocations | — | 2000000 invocations/mo |
| functions outbound gb | — | 5 GB/month |
| hosting storage gb | — | 10 GB |
| hosting transfer gb month | — | 10.8 GB/month |
| phone sms verifications day | — | 10 sms/day |
| rtdb connections | — | 100 connections |
| rtdb downloaded gb month | — | 10 GB/month |
| rtdb stored gb | — | 1 GB |
| storage downloaded gb day | — | 1 GB/day |
| storage gb | — | 5 GB |
| storage operations day | — | 50000 ops/day |
Features
Sentry · 16 features
- Alerts — Metric + issue-based alerts routed to Slack/PagerDuty/email/etc.
- Cron Monitoring — Check-in pings for scheduled jobs. Alert on missed/failed runs.
- Distributed Tracing — Performance monitoring spans across services. Connect frontend → backend → DB.
- Error Tracking — Capture exceptions with stack traces, breadcrumbs, tags, release info, user cont…
- Insights — Pre-built dashboards per domain: Frontend, Backend, Mobile, AI, Database, LLM, e…
- LLM Monitoring — Track OpenAI/Anthropic/etc calls, token usage, cost, errors.
- Logs — Centralized structured logging correlated with errors + traces.
- Profiling — CPU profiling for Python, Node.js, Go, PHP, Ruby, Android, iOS.
- Release Health — Adoption + crash-free rate per release version.
- Releases — Track deploys, commit hooks, source map upload, bisect.
- Seer (AI Debug) — Root cause analysis + fix suggestions for issues via AI.
- Self-Hosting — Docker-based self-host. Feature parity.
- Session Replay — Record DOM + network to replay user sessions that hit errors.
- Source Maps — Auto-symbolicate minified code. Upload via CLI or Webpack/Vite plugin.
- Uptime Monitoring — Synthetic checks for HTTP endpoints.
- User Feedback — In-app feedback widget tied to sessions.
Firebase · 20 features
- A/B Testing — Experiments on Remote Config params, FCM notifications, and Analytics events. Ba…
- App Check — Attestation service: only requests from authentic, untampered app instances reac…
- App Hosting — Managed hosting for modern web apps (Next.js, Angular, SvelteKit). Git-based dep…
- Cloud Firestore — Serverless NoSQL document database. Real-time sync, ACID transactions, offline p…
- Cloud Functions — Serverless functions (Node.js/Python). Trigger on HTTP, Firestore, RTDB, Auth, S…
- Cloud Storage — Object storage for user files. Built on GCS. Security rules + signed URLs. Resum…
- Crashlytics — Real-time crash reporting for iOS/Android/Unity/Flutter. Stack traces, breadcrum…
- Data Connect — GraphQL API backed by Cloud SQL for PostgreSQL. Type-safe SDK generation. Previe…
- Dynamic Links — Deep links that survive app install. NOTE: deprecated, shutdown Aug 2025 — migra…
- FCM Topics — Publish/subscribe messaging: devices subscribe to topic names; backend sends one…
- Firebase AI Logic — Client-side SDK to call Gemini models directly from mobile/web. Formerly "Vertex…
- Firebase Authentication — Drop-in auth: email/password, phone, anonymous, 10+ federated providers, custom …
- Firebase Cloud Messaging — Push notifications for iOS, Android, Web (APNs/FCM transports). Topics, device g…
- Firebase Extensions — Pre-packaged Cloud Functions + config: Stripe, Algolia search, image resize, tra…
- Firebase Hosting — Static + dynamic hosting with global CDN. Preview channels, atomic deploys, rewr…
- Genkit — Open-source AI app framework. Unified API for Gemini, OpenAI, Ollama; tools, RAG…
- Google Analytics for Firebase — Free unlimited event tracking with audience building. BigQuery export on Blaze. …
- Performance Monitoring — App startup, HTTP network, and custom traces. Integrates with Google Analytics e…
- Realtime Database — Low-latency JSON tree database with WebSocket sync. Best for high-frequency pres…
- Remote Config — Feature flags / parameterized config with conditional targeting (user property, …
Developer interfaces
| Kind | Sentry | Firebase |
|---|---|---|
| CLI | Sentry CLI | Firebase CLI |
| SDK | sentry-android, @sentry/browser, sentry-cocoa (iOS), sentry-dotnet, sentry_flutter, sentry-go, sentry-java, @sentry/node, sentry-php, @sentry/react-native, sentry-ruby, sentry-sdk (Python), sentry-unity | Admin SDK (Go), Admin SDK (Java), Admin SDK (Node.js), Admin SDK (Python), Android SDK, Apple Platforms SDK, Flutter SDK (FlutterFire), JavaScript SDK, Unity SDK |
| REST | Sentry REST API | Auth REST API, Cloud Storage REST, Firebase Management API, Firestore REST API, Realtime Database REST |
| MCP | Sentry MCP | Firebase MCP Server |
| OTHER | Webhooks (Alerts) | Firestore gRPC, Realtime Database WebSocket |
Staxly is an independent catalog of developer platforms. Outbound links to Sentry and Firebase are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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