LangSmith
8.0#1 in llm gateway software$39 usage-basedFree planWebAPILinuxmacOS
VisitLangSmith vs ZenMux
What both publish
| Fact | LangSmith | ZenMux |
|---|---|---|
| Headquarters | San Francisco, California, United States | 11 Collyer Quay, #05-06C, The Arcade, Singapore 049317 |
| Integrations | Documented integrations cover OpenAI, Anthropic, Bedrock, Gemini, Mistral, LiteLLM, OpenTelemetry, CrewAI, Vercel AI SDK, PydanticAI, AutoGen and many other frameworks and providers. | The subscription guide lists integrations for Claude Code, CodeX, Cline, VS Code Copilot, OpenCode, Cherry Studio, Obsidian, Dify, and Open WebUI. |
| Observability | Its observability features include agent tracing, cost tracking, online LLM-as-judge and code evaluations, trajectory monitoring, and webhook or PagerDuty alerts. | The platform provides API request logs and analytics for costs, usage, and performance. |
LangSmith plans
- DeveloperFree
- Plus$39 a month
- EnterprisePriced on request
ZenMux plans
- FreeFree
- Starter$20 a month
- Max$100 a month
- Ultra$200 a month
Pick LangSmith if…
LangSmith suits teams building or operating AI agents that need evaluation, prompt workflows, and observability. It supports both hosted and self-hosted deployment options.
Pick ZenMux if…
ZenMux suits developers who want one interface for multiple AI model providers and routing options. Free access fits web experimentation, while paid plans add API use and higher Flow allowances.