Staxly

LangSmith vs ReadMe

LLM observability, testing & evaluation — by LangChain
vs. Developer hub: interactive API reference + guides with usage analytics

LangSmith websiteReadMe website

Pricing tiers

LangSmith

Developer (Free)
Free forever. 5,000 traces/month. 14-day retention. 1 seat. Basic evaluations.
Free
Plus
$39/seat/month. 10k base traces included ($2.50 per 1k overage). Full evaluations, custom dashboards, email support.
$39/mo
Enterprise
Custom. Self-host option, SSO, custom retention, dedicated support.
Custom
LangSmith website

ReadMe

Free
$0. 1 project. ReadMe branding. Public docs only. Basic features. Intended for evaluation.
Free
Startup
$99/mo. 1 project. Custom domain, remove branding, 3 admins, API Explorer.
$99/mo
Business
$399/mo. Unlimited projects, SSO, usage analytics (Metrics Starter), versioning.
$399/mo
Enterprise
Custom (typically $10k+/yr). SLA, SAML, advanced metrics, large teams, localization.
Custom
ReadMe website

Free-tier quotas head-to-head

Comparing developer on LangSmith vs free on ReadMe.

MetricLangSmithReadMe
No overlapping quota metrics for these tiers.

Features

LangSmith · 14 features

  • AlertsThreshold alerts on latency, cost, eval metrics.
  • Annotation QueuesHuman-review workflows for trace quality rating.
  • Custom DashboardsAggregate metrics dashboards per project/tag.
  • DatasetsCollect examples → use as eval sets or training data.
  • EvaluationsLLM-as-judge, embedding similarity, custom Python evaluators, offline batch eval
  • LangChain IntegrationAuto-trace any LangChain/LangGraph run with env var.
  • LangGraph IntegrationFirst-class trace + eval for LangGraph agents.
  • LLM TracingAutomatic trace every LLM call + tool call + chain step.
  • OpenTelemetry ExportExport traces as OTLP to Datadog/Honeycomb/etc.
  • PlaygroundTest prompts + models inline before deploying.
  • Prompt CanvasVisual prompt editor with live test + eval.
  • Prompt HubPublic + private prompt library with versioning.
  • Self-Hosted (Enterprise)Docker + k8s deployment in your infra.
  • Threads + SessionsGroup traces into conversational sessions.

ReadMe · 15 features

  • API ReferenceOpenAPI → interactive reference.
  • ChangelogVersioned release notes.
  • Custom BrandingLogo, colors, fonts.
  • Custom Domaindocs.yourco.com.
  • Discussion ForumDeveloper community.
  • GuidesMarkdown-style conceptual docs.
  • Interactive TutorialsGuided walkthroughs.
  • LocalizationMulti-language docs (Enterprise).
  • MetricsAPI usage logging + analytics.
  • RecipesMulti-step tutorials.
  • SearchFull-text search.
  • SSOSAML + OIDC.
  • Suggested EditsCommunity-contributed edits.
  • Try It ConsoleIn-browser request runner.
  • VersioningMulti-version docs.

Developer interfaces

KindLangSmithReadMe
CLILangSmith CLIrdme CLI
SDKlangsmith-js, langsmith-pythonMetrics SDK
RESTLangSmith REST APIReadMe API v2
MCPLangSmith MCP
OTHERLangSmith DashboardOpenAPI Upload, ReadMe Dashboard, ReadMe Webhooks
Staxly is an independent catalog of developer platforms. Some links to LangSmith and ReadMe may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.

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