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Head-to-head · LLM Observability Tools

Langfuse vs Opik

  • Updated Oct 2026
  • Both researched from official sources
  • 8 checks side by side
Higher score Langfuse #2 in LLM Observability Tools 9.3/10 Free plan Free plan✓ 6 of 6 features Visit Langfuse
Opik #4 in LLM Observability Tools 9.1/10 Free plan Free plan✓ 6 of 6 features Visit Opik

Langfuse leads on 0 checks, Opik on 1, and 7 are even. Who comes out ahead on the 8 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreLangfuse · 9.3/10
  • Lowest starting priceOpik · $19/mo
  • Free planboth

Langfuse scores higher on our rubric for llm observability tools: 9.3 against 9.1 out of 10; our editors rank them #2 and #4.

Opik is cheaper to start at $19/mo against $29/mo.

Langfuse is the better fit for teams seeking balanced open-source observability. Opik is the better fit for cost-conscious teams needing full-stack observability.

  • Langfuse fits best

    Teams seeking balanced open-source observability

  • Opik fits best

    Cost-conscious teams needing full-stack observability

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Langfuse 9.3/10 Visit ↗ Opik 9.1/10 Visit ↗
At a glance
Editor score 9.3 9.1
Ranking #2 in LLM Observability Tools #4 in LLM Observability Tools
Best for Teams seeking balanced open-source observability Cost-conscious teams needing full-stack observability
Pricing model Free plan + paid Free plan + paid
Starting price $29/mo $19/mo (best)
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Email, Live chat, Community, Docs Email, Community, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML
Integrations 100+ integrations 40+ integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Langfuse 6/6 · Opik 6/6
LLM tracing ✓ ✓
LLM evaluations ✓ ✓
Prompt management ✓ ✓
Agent tracing ✓ ✓
Retrieval tracing ✓ ✓
Token cost tracking ✓ ✓
Specs
Deployment options Both Both
Our review
Pros
  • Traces agents, tools, retrieval steps, prompts, costs, and evaluations
  • Supports managed cloud and self-hosted deployment
  • Includes OpenTelemetry, SDK, framework, model, and workflow integrations
  • Free self-hosted and cloud options cover core observability needs
  • Traces model calls, tools, retrieval steps, and agent actions
  • Tracks evaluations, prompts, human feedback, tokens, and model costs
Cons
  • Hobby limits usage, data access, and seats
  • Enterprise SSO and RBAC require the Teams Add-on
  • Advanced governance and SLA features are reserved for Enterprise
  • Enterprise pricing is custom rather than published
  • Self-hosted deployment requires your own infrastructure
  • Its broad scope may exceed teams needing only basic tracing
Our verdict

Langfuse is an open-source platform for teams building and operating LLM applications. It captures hierarchical traces for model calls, agents, tool calls, and retrieval steps, while also covering prompt versioning, evaluations, datasets,…

Read the review →

Opik is an open-source LLM observability and evaluation platform from Comet for teams building chatbots, retrieval-augmented generation pipelines, and multi-step agents. It records model calls, tool invocations, retrieval steps, and agent…

Read the review →
  1. LangfuseLLM Observability Tools 9.3Free plan
  2. OpikLLM Observability Tools 9.1Free plan

Strengths and trade-offs

  • Langfuse — where it wins

    • Traces agents, tools, retrieval steps, prompts, costs, and evaluations
    • Supports managed cloud and self-hosted deployment
    • Includes OpenTelemetry, SDK, framework, model, and workflow integrations

    Where it doesn't

    • Hobby limits usage, data access, and seats
    • Enterprise SSO and RBAC require the Teams Add-on
    • Advanced governance and SLA features are reserved for Enterprise

  • Opik — where it wins

    • Free self-hosted and cloud options cover core observability needs
    • Traces model calls, tools, retrieval steps, and agent actions
    • Tracks evaluations, prompts, human feedback, tokens, and model costs

    Where it doesn't

    • Enterprise pricing is custom rather than published
    • Self-hosted deployment requires your own infrastructure
    • Its broad scope may exceed teams needing only basic tracing
  • Langfuse9.3/10 · Free plan

    A broad observability platform with open-source deployment and accessible paid tiers.

    Visit LangfuseFull verdict →
  • Opik9.1/10 · Free plan

    A broad, cost-conscious stack for tracing, evaluation, prompts, monitoring, and agent debugging.

    Visit OpikFull verdict →

More comparisons

All LLM observability tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update