Galileo AI Eval vs LangSmith: 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 Galileo AI Eval and LangSmith side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, LangSmith leads on lower entry price. We do not name an overall 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:
Galileo AI Eval
The AI observability and evaluation platform to stop AI failures before they happen.
Best for you if:
- • You want enables proactive mitigation of AI failures and hallucinations
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
| At a Glance | Galileo AI Eval | LangSmith |
|---|---|---|
Starts at | Free plan, paid from $100/mo, billed monthly Pro plan | Free plan, paid from $39/seat/mo, billed monthly Plus plan |
Category | Analytics AI Observability | AI Agents Developer Tools |
Rating | 4.4/5 G2 4.4 17 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | Overage fees for traces not explicitly stated | Traces over the included 5k/10k are pay-as-you-go. Seats are only the floor. |
Choose Galileo AI Eval or LangSmith?
Choose Galileo AI Eval if
- You want enables proactive mitigation of AI failures and hallucinations
- You want accelerates AI deployment by providing clear debugging insights
- You work in analytics, not AI agents
Choose LangSmith if
- You want provides deep visibility into non-deterministic LLM behavior
- You want helps improve application performance and response quality
- Budget matters ($39/seat/mo, billed monthly vs $100/mo, billed monthly)
- You work in AI agents, not analytics
In-Depth Analysis
Galileo AI Eval
The AI observability and evaluation platform to stop AI failures before they happen.
Galileo AI Eval's pricing appears fair, offering a generous Free tier with 5,000 traces/month.
Watch out
Overage fees for traces not explicitly stated
Strengths
- Pro: Enables proactive mitigation of AI failures and hallucinations.
- Pro: Accelerates AI deployment by providing clear debugging insights.
- Pro: Offers both pre-built and customizable evaluation tools.
- Pro: Provides real-time protection and governance for AI applications.
- Pro: Scalable and cost-effective evaluation with Luna models.
Weaknesses
- Con: Specific cons are not explicitly mentioned in the provided text.
Key features
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
Plans and prices: Galileo AI Eval vs LangSmith
| Tool | Plans and prices | Source |
|---|---|---|
| Galileo AI Eval |
| galileo.ai/pricing read Oct 20, 2026 |
| LangSmith |
| langchain.com/pricing read Oct 12, 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 Galileo AI Eval pricing and LangSmith pricing.
Key Takeaways
Galileo AI Eval
- Choose if you want the AI observability and evaluation platform to stop AI failures before they happen
LangSmith
- Lower entry price: $39/seat/mo, billed monthly vs $100/mo, billed monthly
What the data shows
On the data below, LangSmith leads on lower entry price. We do not name an overall winner for this pair.
- Only Galileo AI Eval has a published user rating (4.4/5 from 17 reviews); LangSmith has none we can show.
- LangSmith has the lower entry price: $39/seat/mo, billed monthly (Plus) against $100/mo, billed monthly (Pro) for Galileo AI Eval.
- 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 Galileo AI Eval and LangSmith compare in 2026?
On the data below, LangSmith leads on lower entry price. We do not name an overall winner for this pair. Only Galileo AI Eval has a published user rating (4.4/5 from 17 reviews); LangSmith has none we can show. LangSmith has the lower entry price: $39/seat/mo, billed monthly (Plus) against $100/mo, billed monthly (Pro) for Galileo AI Eval. Both have a free plan.
What are Galileo AI Eval and LangSmith used for?
Galileo AI Eval: The AI observability and evaluation platform to stop AI failures before they happen. LangSmith: Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
What does Galileo AI Eval cost vs LangSmith?
Galileo AI Eval's cheapest paid plan is Pro at $100/mo, billed monthly; it also has a free plan. LangSmith's cheapest paid plan is Plus at $39/seat/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 20, 2026.
What's the main difference between Galileo AI Eval and LangSmith?
Galileo AI Eval's main strength: enables proactive mitigation of AI failures and hallucinations. LangSmith's main strength: provides deep visibility into non-deterministic LLM behavior.