Keywords AI vs LangSmith: Which Should You Choose in 2026?
Choosing between Keywords AI and LangSmith comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Keywords AI
The AI gateway with built-in observability for LLM applications.
Best for you if:
- • You need debugging features specifically
- • Unified platform for building, testing, and monitoring LLM applications.
- • Integrates with existing codebases using an OpenAI-compatible API.
LangSmith
Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
Best for you if:
- • You need real-time analytics features specifically
- • Debug LLM applications with detailed agent tracing.
- • Monitor key business metrics with live dashboards and alerts.
| At a Glance |  Keywords AI |  LangSmith |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | Debugging | Real-Time Analytics |
Rating | —/100 | —/100 |
| Feature | Keywords AI | LangSmith |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Editorial Score | — | — |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | DebuggingMonitoring | Real-Time AnalyticsDebugging |
How Keywords AI and LangSmith Compare
Keywords AI
The AI gateway with built-in observability for LLM applications.
Free tier available
LangSmith
Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability.
Free tier available
Keywords AI is a debugging tool. LangSmith is in real-time analytics.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Keywords AI
Want the highest-rated option?
Neither has been rated yet.
Go with: Keywords AI
Value user reviews?
Neither has user reviews yet.
Go with: Keywords AI
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Keywords AI is a debugging tool. LangSmith is in real-time analytics. Pick the category that matches your needs.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
Keywords AI
- Free tier available
- Our pick for this comparison
LangSmith
- Better fit for real-time analytics
The Bottom Line
Keywords AI is our pick.
Frequently Asked Questions
Is Keywords AI or LangSmith better?
Keywords AI scores high/100 in our evaluation. Both are freemium.
What are Keywords AI and LangSmith used for?
Keywords AI: The AI gateway with built-in observability for LLM applications.. LangSmith: Debug, monitor, and optimize your LLM applications and AI agents with comprehensive observability..
What does Keywords AI cost vs LangSmith?
Keywords AI is freemium (free tier + paid plans). LangSmith is freemium (free tier + paid plans). Visit their websites for detailed pricing.