Our verdict
We have not reviewed LangWatch yet
No one at Enterprise DNA has checked this listing against its sources. The description comes from public listings gathered automatically. Any fact below shows where it came from and when it was last checked.
From the listing
About LangWatch
LangWatch is an open-source platform for evaluating LLM outputs and testing AI agent behavior. It provides a framework for running automated evaluations, tracking performance, and debugging agent workflows using TypeScript.
Best for
Developers building and testing LLM-based agents in TypeScript who need a lightweight evaluation framework
Use cases
- Automate evaluation of LLM responses against custom criteria
- Test and debug multi-step AI agent interactions
- Monitor model performance over time with structured logs
Notes
3,275 stars on GitHub. Last updated 2026-06-01. Licensed Apache-2.0.
Pros
- Open-source with active community support
- TypeScript-native, easy to integrate into modern stacks
- Provides structured evaluation pipelines for reproducibility
Cons
- Limited to TypeScript ecosystem, not available for Python or other languages
- Community-driven, may lack enterprise-grade support or SLAs
- Relatively new project with evolving documentation
Key facts
What we have checked
- Latest version
- langwatch-3.21.0 (released 21 Oct 2026)
- GitHub stars
- 4,875
Each value shows when we last confirmed it and where it came from. Values we have not confirmed are left out, never guessed.
Stars and usage
How LangWatch is growing
3,275 to 4,875
Alternatives
Alternatives to LangWatch
| Record | Type | How we know | Checked |
|---|---|---|---|
| lm-evaluation-harnessThis is an alternative to it | Open source | Named in the listing | Not dated |
| OpikThis is an alternative to it | Open source | Named in the listing | Not dated |
| promptfooThis is an alternative to it | Open source | Named in the listing | Not dated |
| RagasThis is an alternative to it | Open source | Named in the listing | Not dated |
Compare
Compare LangWatch side by side
Sources
Where this comes from
- GitHubOfficial
- github api via nightly crawl, recovered from git history 20e874270887c1008f860ee0198e461a23c9e438Registry
A source shows what was published when we checked it. It does not certify security, performance or a working installation. Read our method.
Changelog
What changed
Released langwatch-3.21.0
Released mcp-server@v2.2.0
Released 3.21.0
Released langwatch@v3.21.0
Released typescript-sdk@v1.20.0
Released langwatch-3.20.1
Released 3.20.1
Released langwatch@v3.20.1
Released langwatch-3.20.0
Released 3.20.0
Open-source & AI alternatives
Swap-in tools that solve the same job. Weigh the trade-offs before you commit.
lm-evaluation-harness
Community
A framework for few-shot evaluation of language models.
Opik
Community
Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.
promptfoo
Community
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative config
Ragas
Community
Supercharge Your LLM Application Evaluations 🚀
Pairs with
Other entries in the index that connect to this one. Click through to see the chain.
Crewai
Community
Framework for orchestrating role-playing, autonomous AI agents. By fostering collaborative intelligence, CrewAI empowers agents to work together seamlessly, tackling complex tasks.
AutoGen
Various
A programming framework for agentic AI
LangChain
Various
LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents.
Get the free Developer’s Field Guide
A 27-page field guide to the AI coding workflow with Claude. Claude Code, MCP servers, the prompt patterns that work, and what to delegate. Free.
Enter your work email. We send it straight over, plus a few short notes worth knowing. Unsubscribe any time.