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Logging · head to head

Loki vs Retrace

Loki logo

Loki

Logging

Like Prometheus but for Logs

From
Free
Rated
-
Full reviewWebsite
Retrace logo

Retrace

Logging

Application Performance Monitoring and Logs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Loki the Grafana Cloud free tier caps log ingestion at 50 GB a month with 14 day retention; Retrace end of Life scheduled for March 31, 2027; the product is being discontinued
  • They diverge on capability: Loki covers Log aggregation, Retrace covers Log management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Loki and Retrace actually diverge.

Attributes where Loki and Retrace differ
AttributeLokiRetrace
Pricing modelopen-sourcesubscription
PlatformsWeb, ApiWeb, .NET, Java, PHP, Node.js, Python
Founded20142012

Identical on both: starting price (Free), free tier (Yes), 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 Loki

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

Only in Retrace

  • Log management
  • Application performance tracking
  • Error detection
  • Code profiling
  • Performance baselines

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.

Loki

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

Retrace

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

Where each one falls short

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

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

Retrace

  • End of Life scheduled for March 31, 2027; the product is being discontinued
  • Costs escalate quickly with per-server billing model, expensive at scale
  • User interface and dashboard criticisms; UI is outdated and difficult to use
  • Logging latency; logs can take time to appear and are not instant
  • Less mature support for Node.js, Python, and newer ecosystems
  • Reporting issues where process restarts provide only timeline without root cause data
  • Reliability concerns; monitoring has stopped collecting traces with no warning

Pricing, plan by plan

Loki

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

Retrace

Free
  • FreeFree
    • Log management
    • Application performance tracking
    • Error detection

Which should you pick?

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

Choose Retrace if

  • You need log management.
  • You want to start without paying.
  • You work on Web, .NET, Java, PHP, Node.js, Python.
  • You also want application performance tracking.
Retrace review

Questions people ask

Is Loki or Retrace better?
Neither clearly leads. Loki starts at Free and Retrace at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Loki or Retrace?
Loki starts at Free and Retrace at Free.
Does Loki or Retrace run on more platforms?
Loki runs on Web, Api. Retrace runs on Web, .NET, Java, PHP, Node.js, Python.
Can I use Loki for free?
Both have a free tier, so you can try either at no cost before committing.
What is Loki best used for?
Loki is most often used for aggregating application and infrastructure logs with label based indexing, querying logs alongside metrics in grafana. Of those, aggregating application and infrastructure logs with label based indexing and querying logs alongside metrics in grafana are not what Retrace is typically brought in for.
What can Loki do that Retrace cannot?
Loki covers Log aggregation, Label-based indexing, Real-time log streaming, LogQL query language. Retrace covers Log management, Application performance tracking, Error detection, Code profiling. Both handle API, Webhooks, REST, Web support.

Answered from the vendors’ own pages

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
Retrace: What does Retrace monitor?

Retrace provides application performance monitoring (APM), centralized log management, error tracking, code profiling, and real user monitoring (RUM). It aggregates logs from applications and servers in one place.

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
Retrace: What programming languages does Retrace support?

Retrace supports .NET, .NET Core, PHP, Node.js, Ruby, Python, and Java applications. Support for Node.js, Python, and newer ecosystems is noted as less mature.

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
Retrace: Is Retrace being discontinued?

Yes. Retrace will reach End of Life on March 31, 2027. Users should plan to migrate to alternative solutions.

Source
Retrace: What databases and services does Retrace integrate with?

Retrace supports SQL Server, Oracle, PostgreSQL, MySQL, Redis, MongoDB, Elasticsearch, and cloud platforms like AWS and Azure.

Source
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