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Logging · head to head

Logstash vs Loki

Logstash logo

Logstash

Logging

Data Processing Pipeline for Ingestion

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: 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; Loki the Grafana Cloud free tier caps log ingestion at 50 GB a month with 14 day retention
  • They diverge on capability: Logstash covers Data ingestion, Loki covers Log aggregation.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Logstash and Loki actually diverge.

Attributes where Logstash and Loki differ
AttributeLogstashLoki
Founded20112014

Identical on both: starting price (Free), pricing model (open-source), 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 Logstash

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

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.

Logstash

  • Log monitoringnot Loki
  • Application performancenot Loki
  • Security analyticsnot Loki
  • Troubleshootingnot Loki

Loki

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

Where each one falls short

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

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

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

Logstash

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

Loki

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

Which should you pick?

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

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 Logstash or Loki better?
Neither clearly leads. Logstash 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, Logstash or Loki?
Logstash starts at Free and Loki at Free.
Does Logstash or Loki run on more platforms?
Both run on Web, Api, so platform support will not decide this one for you.
Can I use Logstash for free?
Both have a free tier, so you can try either at no cost before committing.
What is Logstash best used for?
Logstash is most often used for log monitoring, application performance, security analytics, troubleshooting. Of those, log monitoring and application performance are not what Loki is typically brought in for.
What can Logstash do that Loki cannot?
Logstash covers Data ingestion, Event parsing, Data transformation, Multiple input sources. 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

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
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
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
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
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