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Head-to-head · Llm Monitoring

LangSmith vs Helicone

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score LangSmith #1 in Llm Monitoring 9.3/10 Free plan Free plan✓ 2 of 3 features Visit LangSmith
Helicone #8 in Llm Monitoring 8.4/10 Free plan · 7-day trial Free planFree trial✓ 2 of 3 features Visit Helicone

LangSmith leads on 1 check, Helicone on 0, and 3 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreLangSmith · 9.3/10
  • Lowest starting priceLangSmith · $39/seat/mo
  • Free planboth
  • Free trialonly Helicone

LangSmith scores higher on our rubric for llm monitoring: 9.3 against 8.4 out of 10; our editors rank them #1 and #8.

LangSmith is cheaper to start at $39/mo against $79/mo.

LangSmith is the better fit for teams building and monitoring LLM applications and agents. Helicone is the better fit for teams needing a model gateway with observability.

  • LangSmith fits best

    Teams building and monitoring LLM applications and agents

  • Helicone fits best

    Teams needing a model gateway with observability

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Side by side

Feature LangSmith 9.3/10 Visit ↗ Helicone 8.4/10 Visit ↗
At a glance
Editor score 9.3 8.4
Ranking #1 in Llm Monitoring #8 in Llm Monitoring
Best for Teams building and monitoring LLM applications and agents Teams needing a model gateway with observability
Pricing model Free plan + paid Free plan + paid
Starting price $39/seat/mo (best) $79/mo
Free plan ✓ ✓
Free trial — 7 days
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Community, Email, Tickets, Docs · 24/7 Email, Community, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, SSO/SAML SOC 2, HIPAA, SSO/SAML
Integrations 7 integrations 10 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features LangSmith 2/3 · Helicone 2/3
LLM tracing ✓ ✓
Evaluation support ✓ ✓
Alerts Not checked yet Not checked yet
Specs
Deployment options Both Both
Trace retention Not checked yet Not checked yet
LLM providers Not checked yet Not checked yet
Our review
Pros
  • Combines tracing, evaluations, prompt tools, and production monitoring
  • Traces agent and tool calls, with human feedback and annotation workflows
  • Integrates with LangChain, OpenAI, Anthropic, Gemini, Bedrock, and OpenTelemetry
  • Routes requests to 100+ models through an OpenAI-compatible gateway
  • Combines tracing, prompt management, evaluations, and cost analytics
  • Offers cloud or Docker-based self-hosted deployment
Cons
  • Developer plan is limited to one seat and community support
  • Paid seat plans charge usage-based fees beyond included trace allowances
  • Enterprise pricing is custom
  • Pro starts at $79/month, with usage-based pricing also applying
  • Hobby limits usage to 10,000 requests and storage to 1 GB
  • The free plan is limited to one seat and one organization
Our verdict

LangSmith brings development, testing, evaluation, monitoring, and deployment tools for LLM applications and agents into one platform. It supports applications built with LangChain, LangGraph, or other frameworks, making it relevant to…

Read the review →

Helicone brings model routing and LLM observability into one platform for developers and teams building AI applications. Its OpenAI-compatible gateway supports 100+ models, while request logging and dashboards cover requests, sessions,…

Read the review →
  1. LangSmithLlm Monitoring 9.3Free plan
  2. HeliconeLlm Monitoring 8.4Free plan · 7-day trial

Strengths and trade-offs

  • LangSmith — where it wins

    • Combines tracing, evaluations, prompt tools, and production monitoring
    • Traces agent and tool calls, with human feedback and annotation workflows
    • Integrates with LangChain, OpenAI, Anthropic, Gemini, Bedrock, and OpenTelemetry

    Where it doesn't

    • Developer plan is limited to one seat and community support
    • Paid seat plans charge usage-based fees beyond included trace allowances
    • Enterprise pricing is custom

  • Helicone — where it wins

    • Routes requests to 100+ models through an OpenAI-compatible gateway
    • Combines tracing, prompt management, evaluations, and cost analytics
    • Offers cloud or Docker-based self-hosted deployment

    Where it doesn't

    • Pro starts at $79/month, with usage-based pricing also applying
    • Hobby limits usage to 10,000 requests and storage to 1 GB
    • The free plan is limited to one seat and one organization

More comparisons

All llm monitoring comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update