Softwr

Logging · head to head

Azure Monitor vs Logstash

Azure Monitor logo

Azure Monitor

Logging

Azure's Monitoring and Diagnostics Service

From
Free
Rated
-
Full reviewWebsite
Logstash logo

Logstash

Logging

Data Processing Pipeline for Ingestion

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Azure Monitor billed per GB ingested across three separate log plans, Auxiliary, Basic and Analytics, so the plan chosen changes the rate as much as the volume does; Logstash logstash's source is dual licensed: code outside the x-pack directory is Apache License 2.0, but code inside x-pack (which carries several of Logstash's monitoring and management features) is licensed under the Elastic License, not a fully open source license
  • They diverge on capability: Azure Monitor covers Log collection, Logstash covers Data ingestion.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Azure Monitor and Logstash actually diverge.

Attributes where Azure Monitor and Logstash differ
AttributeAzure MonitorLogstash
Pricing modelusage-basedopen-source
Founded20102011

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 Azure Monitor

  • Log collection
  • Metrics collection
  • Alerts and notifications
  • Custom dashboards

Only in Logstash

  • Data ingestion
  • Event parsing
  • Data transformation
  • Multiple input sources

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.

Azure Monitor

  • Collecting logs and metrics from Azure resourcesnot Logstash
  • Alerting on metric thresholds and log queriesnot Logstash
  • Application performance monitoring through Application Insightsnot Logstash
  • Long-term log retention for compliancenot Logstash
  • Querying operational data with KQLnot Logstash

Logstash

  • Log monitoringnot Azure Monitor
  • Application performancenot Azure Monitor
  • Security analyticsnot Azure Monitor
  • Troubleshootingnot Azure Monitor

Where each one falls short

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

Azure Monitor

  • Billed per GB ingested across three separate log plans, Auxiliary, Basic and Analytics, so the plan chosen changes the rate as much as the volume does
  • Only the first 5 GB a month of Analytics logs is free per billing account
  • Retention beyond the base period is charged per GB per month, up to 2 years interactive and 12 years long term
  • Log queries and search jobs are billed per GB scanned, so investigating an incident costs money
  • Alert rules are billed per time series for metrics and by execution frequency for logs
  • The pricing page shows placeholders rather than rates until a region and currency are chosen

Logstash

  • Logstash's source is dual licensed: code outside the x-pack directory is Apache License 2.0, but code inside x-pack (which carries several of Logstash's monitoring and management features) is licensed under the Elastic License, not a fully open source license

Pricing, plan by plan

Azure Monitor

Free
  • FreeFree
    • Log collection
    • Metrics collection
    • Alerts and notifications

Logstash

Free
  • FreeFree
    • Data ingestion
    • Event parsing
    • Data transformation

Which should you pick?

Choose Azure Monitor if

  • You need log collection.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want metrics collection.
Azure Monitor review

Choose Logstash if

  • You need data ingestion.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want event parsing.
Logstash review

Questions people ask

Is Azure Monitor or Logstash better?
Neither clearly leads. Azure Monitor starts at Free and Logstash at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Azure Monitor or Logstash?
Azure Monitor starts at Free and Logstash at Free.
Does Azure Monitor or Logstash run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Azure Monitor for free?
Both have a free tier, so you can try either at no cost before committing.
What is Azure Monitor best used for?
Azure Monitor is most often used for collecting logs and metrics from azure resources, alerting on metric thresholds and log queries, application performance monitoring through application insights, long-term log retention for compliance. Of those, collecting logs and metrics from azure resources and alerting on metric thresholds and log queries are not what Logstash is typically brought in for.
What can Azure Monitor do that Logstash cannot?
Azure Monitor covers Log collection, Metrics collection, Alerts and notifications, Custom dashboards. Logstash covers Data ingestion, Event parsing, Data transformation, Multiple input sources. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

Azure Monitor: How does Azure Monitor billing work?

Billing is based on data volume ingested into Azure Monitor. Additional charges apply separately for alerts, notifications, web tests, and data export. Activity log and platform metrics are automatically collected with an Azure subscription.

Source
Logstash: How much does Logstash cost?

Logstash is free and open-source. The data processing pipeline is available to download at no charge and can be deployed without licensing costs or commercial restrictions.

Source
Azure Monitor: What savings are available with Azure Monitor?

Capacity reservations offer up to 36% savings compared to standard pay-as-you-go pricing when you commit to reserved capacity upfront.

Source
Azure Monitor: Is there a free tier for Azure Monitor?

No dedicated free tier exists. Activity log and platform metrics are automatically collected with an Azure subscription, but detailed monitoring requires additional configuration and associated costs.

Source
Share

Related pages

More on Azure Monitor

More on Logstash

Keep looking

Other head to heads