AI Infrastructure & MLOps Free

OpenLIT

Open-source observability and evaluation platform for LLM applications and agents

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PricingFree
Starting price$0
Free planYes
Free trialYes
APIYes
Open sourceYes
DeploymentSelf Hosted
Last verifiedAugust 3, 2026
Overview

Tool overview

OpenLIT is listed under AI Infrastructure & MLOps AI tools.

Summary

What is OpenLIT?

OpenLIT provides open-source observability for language-model applications and agents. It captures traces, metrics, costs, prompts, evaluations, and guardrail signals through OpenTelemetry-compatible instrumentation and a self-hosted platform.

Best fit

Best for

Engineering teams operating observable language-model applications and agents

Audience

Who is it for?

AI engineersPlatform teamsML operations teamsApplication developers
Recommendation

Decision note

Rebuilt from the original export under the complete V411 factual-source-verification workflow. Preview only. Apply remains blocked until Failures = 0, Warnings = 0, Unmapped = 0, Missing = 0, all explicit clears are reviewed, image import is disabled or V380 accepts the logo asset, one representative WordPress edit screen is compared with the export and proposed row, and a post-Apply zero-change Preview is completed.

Capabilities

Key features

OpenTelemetry-native LLM observability

Traces, metrics, costs, and prompt analysis

Evaluations and guardrail workflows

Self-hosted Docker and Kubernetes deployment

Workflows

Use cases

Monitor production LLM applications

Trace agent and tool calls

Evaluate prompts and responses

Track model usage and cost

Strengths

Pros

  • Apache-2.0 open-source platform
  • Free self-hosted edition
  • Supports multiple application SDKs
Considerations

Limitations

Telemetry can contain prompts, outputs, identifiers, and sensitive application data.

Teams must configure redaction, access control, retention, sampling, and secure deployment before production use.

Cost

Pricing details

Pricing modelFree
Starting price$0
Free planYes
Free trialYes
Pricing context

Billing options

Free self-hostedFuture managed cloud
Pricing context

Pricing note

OpenLIT is free to self-host under Apache-2.0. The official pricing page describes managed cloud access as coming soon rather than a currently priced plan.

View official pricing
Compatibility

Supported languages

  • English
Connectivity

Integrations

OpenTelemetry

OpenAI

Anthropic

LangChain

LlamaIndex

Specs

Technical details

PlatformsDesktop
Multilingual supportUnknown
Login requiredUnknown
Open sourceYes
LicenseApache-2.0
DeploymentSelf Hosted
CompanyOpenLIT community
Current version1.21.1
Data confidenceHigh
Last verifiedAugust 3, 2026
Documentation → Source code → Release notes → Data source →
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Answers

Frequently asked questions

OpenLIT provides open-source observability for language-model applications and agents. It captures traces, metrics, costs, prompts, evaluations, and guardrail signals through OpenTelemetry-compatible instrumentation and a self-hosted platform.
Engineering teams operating observable language-model applications and agents
The listed pricing model for OpenLIT is Free. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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