LangSmith vs Yak
LangSmith
langchain.comYak
yak.ioSide by side
| Figure | LangSmith | Yak |
|---|---|---|
| Price from | $39/mo | $800/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 3 | 5 |
| Spec score · AI Agent Platforms | 9.0 (#4) | 7.5 (#53) |
| Security | LangSmith's trust center lists SOC 2 Type II, ISO 27001:2022, GDPR and HIPAA compliance. | Yak says it implements technical and organizational security measures, while noting that no internet transmission or electronic storage method is completely secure. |
| Support | The Developer plan includes community support, and the Enterprise plan lists a support SLA. | Yak says its support team will respond to email within one business day. |
Plans
Yak
- PAYGFree
- Growth$800 a month
- Business$2,100 a month
- Scale$4,500 a month
- EnterprisePriced on request
In their own words
LangSmith
LangSmith is a commercial agent-engineering platform for building, evaluating, deploying, monitoring, and improving AI agents. It supports offline evaluations on curated datasets and real-time scoring of production interactions. Evaluation methods include human review, heuristic checks, LLM-as-judge evaluators, pairwise comparisons, and custom Python or TypeScript evaluators. Annotation queues route runs to subject-matter experts for feedback that can calibrate evaluations, improve prompts, or augment datasets. The Playground compares prompt versions or model providers, and LangSmith chat can auto-improve prompts. Observability includes agent and retrieval tracing, token and general cost tracking, trajectory monitoring, online evaluations, and webhook or PagerDuty alerts. Traces can arrive through SDKs or an API from LangGraph, custom Python, or other stacks; SDKs are listed for Python, TypeScript, Go, and Java. Hosting ranges from cloud to hybrid and self-hosted Enterprise options. The Developer plan costs nothing, Plus costs $39 a month, and Enterprise pricing is custom.