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Grafana Loki vs Sentry

Grafana Loki logo

Grafana Loki

Software

Log Aggregation for Grafana Stack

From
Free
Rated
-
Full reviewWebsite
Sentry logo

Sentry

Software

Application monitoring platform built by developers for developers

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Grafana Loki grafana Cloud Logs Pro plan includes only 30-day retention; retention beyond 30 days requires Enterprise plan with minimum $25,000 annual commitment; Sentry spending caps stop event ingestion when reached, eliminating visibility during critical moments
  • They diverge on capability: Grafana Loki covers Log aggregation, Sentry covers Error tracking.

Where they differ

Only the attributes on which Grafana Loki and Sentry actually diverge.

Attributes where Grafana Loki and Sentry differ
AttributeGrafana LokiSentry
Pricing modelfreemiumUnknown
PlatformsSelf-hosted (open source), Managed (Grafana Cloud Logs), Enterprise (self-managed with support)Web, iOS, Android, React Native, Desktop, 30+ frameworks and languages
Founded20142011

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

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 Grafana Loki

  • Log aggregation
  • Label-based indexing
  • LogQL language
  • Cost-effective
  • API
  • Webhooks
  • REST
  • Web support

Only in Sentry

  • Error tracking
  • Performance monitoring
  • Release tracking
  • Real user monitoring
  • Alerting
  • Issue assignment
  • Breadcrumbs
  • Source maps

What people use each for

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

Grafana Loki

  • Cost-sensitive organisations deploying Kubernetes and Prometheus ecosystemsnot Sentry
  • Teams needing index-free log aggregation for high-volume environmentsnot Sentry

Sentry

  • Error monitoringnot Grafana Loki
  • Performance trackingnot Grafana Loki
  • Debug production issuesnot Grafana Loki
  • Release managementnot Grafana Loki
  • User monitoringnot Grafana Loki

Where each one falls short

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

Grafana Loki

  • Grafana Cloud Logs Pro plan includes only 30-day retention; retention beyond 30 days requires Enterprise plan with minimum $25,000 annual commitment
  • Open-source version requires self-hosting all infrastructure including storage and scaling

Sentry

  • Spending caps stop event ingestion when reached, eliminating visibility during critical moments
  • Complex configuration required for filters, sampling rules, issue grouping, and alert policies
  • Difficult to configure custom alerts and alert content without creating email inbox bloat
  • Error grouping is imperfect with noise and filtering issues causing incorrect error prioritization
  • Weak for distributed tracing across microservices compared to dedicated APM tools
  • UI dashboard is less customizable than alternatives like Datadog APM for complex monitoring needs

Pricing, plan by plan

Grafana Loki

Free

No published plan breakdown. See the Grafana Loki review.

Sentry

Free
  • Developer (Free)Free
    • 5K errors per month
    • 1 user seat
    • 30-day data retention
  • Team$26/month
    • 50K errors per month
    • 5M transaction spans
    • 90-day data retention
  • Business$80/month
    • Higher quotas
    • Extended retention
    • Advanced filtering
  • Organization$199/month
    • SSO integration
    • Audit logs
    • Advanced security

Which should you pick?

Choose Grafana Loki if

  • You need log aggregation.
  • You want to start without paying.
  • You work on Self-hosted (open source), Managed (Grafana Cloud Logs), Enterprise (self-managed with support).
  • You also want label-based indexing.
Grafana Loki review

Choose Sentry if

  • You need error tracking.
  • You want to start without paying.
  • You work on Web, iOS, Android, React Native, Desktop, 30+ frameworks and languages.
  • You also want performance monitoring.
Sentry review

Questions people ask

Is Grafana Loki or Sentry better?
Neither clearly leads. Grafana Loki starts at Free and Sentry at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Grafana Loki or Sentry?
Grafana Loki starts at Free and Sentry at Free.
Does Grafana Loki or Sentry run on more platforms?
Grafana Loki runs on Self-hosted (open source), Managed (Grafana Cloud Logs), Enterprise (self-managed with support). Sentry runs on Web, iOS, Android, React Native, Desktop, 30+ frameworks and languages.
Can I use Grafana Loki for free?
Both have a free tier, so you can try either at no cost before committing.
What is Grafana Loki best used for?
Grafana Loki is most often used for cost-sensitive organisations deploying kubernetes and prometheus ecosystems, teams needing index-free log aggregation for high-volume environments. Of those, cost-sensitive organisations deploying kubernetes and prometheus ecosystems and teams needing index-free log aggregation for high-volume environments are not what Sentry is typically brought in for.
What can Grafana Loki do that Sentry cannot?
Grafana Loki covers Log aggregation, Label-based indexing, LogQL language, Cost-effective. Sentry covers Error tracking, Performance monitoring, Release tracking, Real user monitoring.

Answered from the vendors’ own pages

Sentry: Does Sentry have a free tier?

Yes. The free Developer tier includes 5,000 errors per month, one user seat, 30-day retention, and 50 session replays per month.

Source
Sentry: How much do Sentry's paid plans cost?

Team plan starts at $26/month (annual) or $29/month (monthly) with 50K errors and 5M spans included. Business plan is $80-89/month. Organization plans start at $199/month with SSO and advanced compliance features.

Source
Sentry: What programming languages does Sentry support?

Sentry supports over 30 languages and frameworks including JavaScript, Python, Go, Ruby, Java, .NET, PHP, Node.js, and mobile platforms including iOS, Android, and React Native.

Source
Sentry: Does Sentry support self-hosting?

Yes. Sentry can be self-hosted, and the open-source version is available for deployment in on-premises environments.

Source
Sentry: How does Sentry billing work if I exceed my quota?

Sentry offers spending caps that stop ingestion when reached, meaning you lose visibility exactly when you need it most. You can pre-purchase reserved capacity at 20% discount or pay per event on-demand when exceeding included allotment.

Source
Sentry: What integrations does Sentry support?

Sentry integrates with GitHub, GitLab, Jira, Slack, PagerDuty, most CI/CD pipelines, and many other developer tools.

Source
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