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Logging · head to head

Bugsnag vs Loki

Bugsnag logo

Bugsnag

Logging

Application Stability Monitoring

From
Free
Rated
-
Full reviewWebsite
Loki logo

Loki

Logging

Like Prometheus but for Logs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Bugsnag owned by SmartBear rather than being independent; Loki the Grafana Cloud free tier caps log ingestion at 50 GB a month with 14 day retention
  • They diverge on capability: Bugsnag covers Error tracking, Loki covers Log aggregation.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Bugsnag and Loki actually diverge.

Attributes where Bugsnag and Loki differ
AttributeBugsnagLoki
Pricing modelfreemiumopen-source
Founded20122014

Identical on both: starting price (Free), free tier (Yes), platforms (Web, Api), user rating (Not yet rated), category (Logging).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bugsnag

  • Error tracking
  • Crash reporting
  • Release tracking
  • Trend analysis

Only in Loki

  • Log aggregation
  • Label-based indexing
  • Real-time log streaming
  • LogQL query language

Both cover

  • API
  • Webhooks
  • REST
  • Web support
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

Bugsnag

  • Crash and error reporting for mobile and web applicationsnot Loki
  • Stability scores per releasenot Loki
  • Grouping errors by root cause across deploysnot Loki
  • Alerting when a release regressesnot Loki

Loki

  • Aggregating application and infrastructure logs with label based indexingnot Bugsnag
  • Querying logs alongside metrics in Grafananot Bugsnag

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bugsnag

  • Owned by SmartBear rather than being independent
  • The free tier covers 7,500 events a month
  • Paid tiers are usage-priced by event volume rather than by seat, so a noisy release raises the bill
  • Enterprise pricing is quote-only

Loki

  • The Grafana Cloud free tier caps log ingestion at 50 GB a month with 14 day retention
  • Paid log pricing is split across three separate meters, at $0.050 per GB processed, $0.400 per GB written and $0.100 per GB retained
  • Retaining logs is billed separately from ingesting them, so keeping data costs on an ongoing basis rather than once
  • The Pro plan carries a $19 a month platform fee before any usage charges

Pricing, plan by plan

Bugsnag

Free
  • FreeFree
    • 1 user
    • Error and performance monitoring
    • 7500 events monthly
  • SelectFree
    • 50000-3 million error monitoring events monthly tiered
    • 1-150 million performance monitoring spans
    • Unlimited users
  • PreferredFree
    • 100000-3 million error monitoring events tiered
    • 1-300 million performance monitoring spans
    • Automatic error prioritization
  • Enterprise$null/month
    • Custom pricing
    • All Preferred features plus
    • Automatic error assignment

Loki

Free
  • FreeFree
    • Log aggregation
    • Label-based indexing
    • Real-time log streaming

Which should you pick?

Choose Bugsnag if

  • You need error tracking.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want crash reporting.
Bugsnag review

Choose Loki if

  • You need log aggregation.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want label-based indexing.
Loki review

Questions people ask

Is Bugsnag or Loki better?
Neither clearly leads. Bugsnag starts at Free and Loki at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bugsnag or Loki?
Bugsnag starts at Free and Loki at Free.
Does Bugsnag or Loki run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Bugsnag for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bugsnag best used for?
Bugsnag is most often used for crash and error reporting for mobile and web applications, stability scores per release, grouping errors by root cause across deploys, alerting when a release regresses. Of those, crash and error reporting for mobile and web applications and stability scores per release are not what Loki is typically brought in for.
What can Bugsnag do that Loki cannot?
Bugsnag covers Error tracking, Crash reporting, Release tracking, Trend analysis. Loki covers Log aggregation, Label-based indexing, Real-time log streaming, LogQL query language. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

Bugsnag: Is BugSnag free?

BugSnag Free plan is free and includes 1 user, error and performance monitoring with 7500 events and 1 million spans monthly, 50+ platforms, 30+ integrations, and 7-day data retention for solo developers and passion projects.

Source
Loki: What does it cost to use Grafana Loki?

Loki is open source and free under the AGPLv3 license for self-hosted deployments. Grafana's managed Cloud Logs service includes a free tier up to 50GB of logs at no cost.

Source
Bugsnag: What are the event and span limits by BugSnag plan?

Free plan: 7500 error events and 1 million spans monthly. Select plan: 50000-3 million error events and 1-150 million spans tiered. Preferred plan: 100000-3 million error events and 1-300 million spans tiered. Enterprise plan: custom limits with pricing on request.

Source
Loki: Are there paid options for Loki beyond the free tier?

Yes. Grafana Cloud Logs offers paid tiers for teams and enterprises, and Enterprise Logs provides self-managed options with expert support for organizations with data localization or privacy requirements.

Source
Bugsnag: How long does BugSnag retain error data?

BugSnag Free plan retains data for 7 days. Select and Preferred paid plans retain error data for 60 days. Enterprise plans offer custom data retention periods negotiated with sales.

Source
Loki: What license does open source Loki use?

Loki is released under the AGPLv3 license, which requires you to share modifications and publish your source code if you deploy modifications publicly.

Source
Bugsnag: What features does BugSnag Preferred plan add?

BugSnag Preferred plan (pricing tiered by volume, not published) adds automatic error prioritization, stability benchmarks, advanced segmentation, custom notifications, SAML SSO, and system metrics monitoring compared to Select plan.

Source
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