--- title: LLM Observability Pricing: What Do These Platforms... description: A comparison of LLM observability and evaluation platform pricing, breaking down billing units (spans, traces, events, seats) across Opik, LangSmith, Langfuse,... canonical: https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: LLM Observability Pricing: What Do These Platforms Actually Cost? | daily.dev og:description: A comparison of LLM observability and evaluation platform pricing, breaking down billing units (spans, traces, events, seats) across Opik, LangSmith, Langfuse,... og:url: https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac og:image: https://api.daily.dev/og/posts/s14EgxdaC.png og:image:alt: LLM Observability Pricing: What Do These Platforms Actually Cost? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # LLM Observability Pricing: What Do These Platforms Actually Cost? **[HEARTBEAT](https://daily.dev/sources/hrb)** · 9 min read · 1 upvotes · 0 comments ## Summary A comparison of LLM observability and evaluation platform pricing, breaking down billing units (spans, traces, events, seats) across Opik, LangSmith, Langfuse, and Arize as of August 2026. Covers free tiers, paid tiers, self-hosting options, whether evaluation is bundled with tracing, and how retention windows affect real cost. Includes a checklist of questions to ask vendors before signing a contract. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the difference between how LangSmith and Opik bill for LLM observability usage? LangSmith bills per trace, counting each full request as one unit regardless of how many steps it contains, while Opik bills per span, counting every discrete operation like an LLM call, retrieval step, or tool invocation. A single agent request can generate eight to fifteen spans, so per-span and per-trace pricing produce very different invoices at the same traffic volume. _Comparing tracing-cost models for LLM observability tools is easier with facts developers gather on daily.dev before signing a contract._ ### Can I self-host LangSmith without an enterprise contract? No, LangSmith's self-hosted deployment option requires an enterprise agreement and is not available on the free Developer or Plus tiers. By contrast, Opik is self-hostable free under Apache 2.0 with no span cap, and Langfuse is self-hostable free under MIT license, though some Langfuse cloud-only features are excluded from self-hosted deployments. _Developers weighing self-hosted versus managed observability platforms track these tradeoffs on daily.dev._ ### Does LLM evaluation cost extra on top of tracing in observability platforms? It depends on the vendor: Opik includes LLM-as-a-Judge evaluation in every tier, including the free cloud tier and self-hosted version, counting evaluation runs against the same span quota on cloud plans and with no cap on self-hosted deployments. Other platforms often price evaluation separately as a distinct tier or consumption charge, which can exceed base tracing costs at high volume. _Teams budgeting for tracing plus evaluation compute costs use daily.dev to stay ahead of pricing details like this._ ## Similar posts on daily.dev - [LLM Observability Tools Compared: LangFuse vs LangSmith vs Opik](https://daily.dev/posts/llm-observability-tools-compared-langfuse-vs-langsmith-vs-opik-qdjdhjilu) · BigData Boutique blog · 0 upvotes · 0 comments - [LLM Observability Tools for Reliable AI Applications](https://daily.dev/posts/llm-observability-tools-for-reliable-ai-applications-oy255bw6k) · Machine Learning Mastery · 1 upvotes · 0 comments - [Self-Hosted or SaaS: How Should You Deploy Your LLM Observability Platform?](https://daily.dev/posts/self-hosted-or-saas-how-should-you-deploy-your-llm-observability-platform--j6cnqwh3m) · HEARTBEAT · 0 upvotes · 0 comments - [Open Source or Commercial LLM Observability: How Do You Choose?](https://daily.dev/posts/open-source-or-commercial-llm-observability-how-do-you-choose--sb5knheph) · HEARTBEAT · 0 upvotes · 0 comments - [Using LLM Observability to Cut Costs and Improve Performance](https://daily.dev/posts/using-llm-observability-to-cut-costs-and-improve-performance-np55kgk3t) · finout · 0 upvotes · 0 comments --- Tags: [#langsmith](https://daily.dev/tags/langsmith), [#llm-observability](https://daily.dev/tags/llm-observability) [View this post on daily.dev](https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"LLM Observability Pricing: What Do These Platforms Actually Cost?","url":"https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac"},"datePublished":"2026-08-19T16:28:37.576Z","dateModified":"2026-09-13T19:32:57.190Z","description":"A comparison of LLM observability and evaluation platform pricing, breaking down billing units (spans, traces, events, seats) across Opik, LangSmith, Langfuse,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/9c95cb41140d3b18ca20b94fe0ce91c8?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/9c95cb41140d3b18ca20b94fe0ce91c8?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"HEARTBEAT","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"HEARTBEAT","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/hrb","url":"https://daily.dev/sources/hrb"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"langsmith,llm-observability","timeRequired":"PT9M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"HEARTBEAT","item":"https://daily.dev/sources/hrb"},{"@type":"ListItem","position":3,"name":"LLM Observability Pricing: What Do These Platforms Actually Cost?"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/llm-observability-pricing-what-do-these-platforms-actually-cost--s14egxdac#faq","mainEntity":[{"@type":"Question","name":"What is the difference between how LangSmith and Opik bill for LLM observability usage?","acceptedAnswer":{"@type":"Answer","text":"LangSmith bills per trace, counting each full request as one unit regardless of how many steps it contains, while Opik bills per span, counting every discrete operation like an LLM call, retrieval step, or tool invocation. 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