LangWatch vs DeepEval: Which Should You Choose in 2026?
Choosing between LangWatch and DeepEval 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 22, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
LangWatch
The #1 AI engineering platform to stress-test your AI agents pre- and in production.
Best for you if:
- • Provides a comprehensive platform for testing, evaluating, and monitoring AI agents throughout their lifecycle.
- • Enables continuous quality assurance for AI systems through simulations, automated evaluations, and production observability.
DeepEval
The comprehensive LLM evaluation framework for building reliable AI applications.
Best for you if:
- • An open-source LLM evaluation framework for testing AI systems.
- • Offers 50+ research-backed metrics, including G-Eval, DAGA, and QAG.
| At a Glance |  LangWatch |  DeepEval |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | Testing & QA | Testing & QA |
Rating | —/100 | —/100 |
| Feature | LangWatch | DeepEval |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Editorial Score | — | — |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Testing & QAAI Agents | Testing & QAAI Research |
How LangWatch and DeepEval Compare
LangWatch
The #1 AI engineering platform to stress-test your AI agents pre- and in production.
Free tier available
DeepEval
The comprehensive LLM evaluation framework for building reliable AI applications.
Free tier available
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: LangWatch
Want the highest-rated option?
Neither has been rated yet.
Go with: LangWatch
Value user reviews?
Neither has user reviews yet.
Go with: LangWatch
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?
Both are testing & qa tools. Compare their specific features to decide.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
LangWatch
- Free tier available
- Our pick for this comparison
DeepEval
The Bottom Line
LangWatch is our pick.
Frequently Asked Questions
Is LangWatch or DeepEval better?
LangWatch scores high/100 in our evaluation. Both are freemium.
What are LangWatch and DeepEval used for?
LangWatch: The #1 AI engineering platform to stress-test your AI agents pre- and in production.. DeepEval: The comprehensive LLM evaluation framework for building reliable AI applications..
What does LangWatch cost vs DeepEval?
LangWatch is freemium (free tier + paid plans). DeepEval is freemium (free tier + paid plans). Visit their websites for detailed pricing.