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Logstash vs Traceloop

Logstash logo

Logstash

Logging

Data Processing Pipeline for Ingestion

From
Free
Rated
-
Full reviewWebsite
Traceloop logo

Traceloop

Logging

LLM reliability platform with open-source observability and evaluation

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; Traceloop free tier limited to 50k spans per month and 24-hour retention, restricting production use
  • They diverge on capability: Logstash covers Data ingestion, Traceloop covers Open-source SDK (OpenLLMetry).
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Logstash and Traceloop actually diverge.

Attributes where Logstash and Traceloop differ
AttributeLogstashTraceloop
Pricing modelopen-sourceFreemium with pay-as-you-go enterprise option
PlatformsWeb, ApiCloud, On-premises, Air-gapped, Python, TypeScript, Go, Ruby
Founded2011Unknown

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 Logstash

  • Data ingestion
  • Event parsing
  • Data transformation
  • Multiple input sources
  • API
  • Webhooks
  • REST
  • Web support

Only in Traceloop

  • Open-source SDK (OpenLLMetry)
  • Multi-provider support
  • Observability platform integration
  • Framework support
  • Monitoring dashboard
  • Evaluation system
  • Deployment flexibility

What people use each for

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

Logstash

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

Traceloop

  • Monitoring LLM application performance in productionnot Logstash
  • Instrumenting LLM apps with minimal code overheadnot Logstash
  • Continuous evaluation and quality scoring of LLM outputsnot Logstash
  • Debugging LLM application issues with full trace visibilitynot Logstash
  • Integrating observability data into existing monitoring stacksnot 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

Traceloop

  • Free tier limited to 50k spans per month and 24-hour retention, restricting production use
  • Company acquisition by ServiceNow creates uncertainty about future roadmap
  • Requires integration with separate observability platforms for visualization
  • Less feature-rich than dedicated LLM evaluation platforms

Pricing, plan by plan

Logstash

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

Traceloop

Free
  • FreeFree
    • 50,000 spans per month
    • Up to 5 seats
    • 24-hour data retention
  • Enterprise$undefined/custom
    • Unlimited spans per month
    • Unlimited seats
    • Custom data retention

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 Traceloop if

  • You need open-source sdk (openllmetry).
  • You want to start without paying.
  • You work on Cloud, On-premises, Air-gapped, Python, TypeScript, Go, Ruby.
  • You also want multi-provider support.
Traceloop review

Questions people ask

Is Logstash or Traceloop better?
Neither clearly leads. Logstash starts at Free and Traceloop at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Logstash or Traceloop?
Logstash starts at Free and Traceloop at Free.
Does Logstash or Traceloop run on more platforms?
Logstash runs on Web, Api. Traceloop runs on Cloud, On-premises, Air-gapped, Python, TypeScript, Go, Ruby.
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 Traceloop is typically brought in for.
What can Logstash do that Traceloop cannot?
Logstash covers Data ingestion, Event parsing, Data transformation, Multiple input sources. Traceloop covers Open-source SDK (OpenLLMetry), Multi-provider support, Observability platform integration, Framework 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
Traceloop: Is OpenLLMetry open-source?

Yes, OpenLLMetry is Traceloop's open-source SDK built on OpenTelemetry standards. It allows teams to instrument LLM applications with just 2 lines of code and send data to 25+ observability platforms.

Source
Traceloop: What is the impact of ServiceNow acquisition?

Traceloop is joining ServiceNow, representing a strategic acquisition that will broaden enterprise adoption and integration capabilities. Current operations continue with free and enterprise options available.

Source
Traceloop: How many LLM providers and frameworks does Traceloop support?

Traceloop supports 20+ LLM providers including OpenAI and Anthropic, and integrates with frameworks like LangChain and LlamaIndex. It can send data to 25+ observability platforms.

Source
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