LangSmith vs OpenLLMetry: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for LangSmith and OpenLLMetry side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
LangSmith
Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
Best for you if:
- • You want provides deep visibility into non-deterministic LLM behavior
OpenLLMetry
Open-source observability for LLMs using OpenTelemetry.
Best for you if:
- • You want leverages open standards (OpenTelemetry)
| At a Glance | LangSmith | OpenLLMetry |
|---|---|---|
Starts at | Free plan, paid from $39/seat/mo, billed monthly Plus plan | Free plan |
Category | AI Agents Developer Tools | Monitoring DevOps |
Rating | n/a | n/a |
Free plan | Yes | Yes |
Watch out for | Traces over the included 5k/10k are pay-as-you-go. Seats are only the floor. | No clear pricing for exceeding 50K spans/month on free tier. |
Choose LangSmith or OpenLLMetry?
Choose LangSmith if
- You want provides deep visibility into non-deterministic LLM behavior
- You want helps improve application performance and response quality
- You work in AI agents, not monitoring
Choose OpenLLMetry if
- You want leverages open standards (OpenTelemetry)
- You want easy integration with minimal code changes
- You work in monitoring, not AI agents
In-Depth Analysis
LangSmith
Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
LangSmith Developer is $0 for one seat and 5,000 base traces/month.
Watch out
Traces over the included 5k/10k are pay-as-you-go. Seats are only the floor.
Strengths
- Pro: Provides deep visibility into non-deterministic LLM behavior
- Pro: Helps improve application performance and response quality
- Pro: Offers comprehensive monitoring and alerting capabilities
- Pro: Identifies systemic issues and user needs automatically
- Pro: Flexible integration with various frameworks and OTel
Weaknesses
- Con: Specific pricing details require visiting a separate page
- Con: Self-hosting is only available on the enterprise plan
- Con: Requires some setup (e.g., environment variables) to get started
Key features
OpenLLMetry
Open-source observability for LLMs using OpenTelemetry.
OpenLLMetry offers a generous "Free Forever" tier with up to 50K spans/month, which is excellent for small projects and individual developers.
Watch out
No clear pricing for exceeding 50K spans/month on free tier.
Strengths
- Pro: Leverages open standards (OpenTelemetry)
- Pro: Easy integration with minimal code changes
- Pro: Supports both Python and TypeScript/Node.js
- Pro: Provides visibility into LLM application workflows
- Pro: Vendor-neutral for data export
Weaknesses
- Con: Requires an OpenTelemetry backend for full visualization
- Con: Limited information on advanced features or customization options from the provided content
Key features
Plans and prices: LangSmith vs OpenLLMetry
| Tool | Plans and prices | Source |
|---|---|---|
| LangSmith |
| langchain.com/pricing read Oct 12, 2026 |
| OpenLLMetry |
| traceloop.com/pricing read Oct 2, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on LangSmith pricing and OpenLLMetry pricing.
Key Takeaways
LangSmith
- Choose if you want debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability
OpenLLMetry
- Choose if you want open-source observability for LLMs using OpenTelemetry
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- LangSmith starts at $39/seat/mo, billed monthly; OpenLLMetry has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do LangSmith and OpenLLMetry compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. LangSmith starts at $39/seat/mo, billed monthly; OpenLLMetry has no public paid plan price on file. Both have a free plan.
What are LangSmith and OpenLLMetry used for?
LangSmith: Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability. OpenLLMetry: Open-source observability for LLMs using OpenTelemetry.
What does LangSmith cost vs OpenLLMetry?
LangSmith's cheapest paid plan is Plus at $39/seat/mo, billed monthly; it also has a free plan. OpenLLMetry has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Oct 12, 2026.
What's the main difference between LangSmith and OpenLLMetry?
LangSmith's main strength: provides deep visibility into non-deterministic LLM behavior. OpenLLMetry's main strength: leverages open standards (OpenTelemetry).