LangSmith
8.0#1 in llm gateway software$39 usage-basedFree planWebAPILinuxmacOS
VisitLangSmith vs OpenRouter
OpenRouter
7.0#15 in llm gatewaysFree planFree planWebAPI
VisitWhat both publish
| Fact | LangSmith | OpenRouter |
|---|---|---|
| Founded | 2023 | 2023 |
| Integrations | Documented integrations cover OpenAI, Anthropic, Bedrock, Gemini, Mistral, LiteLLM, OpenTelemetry, CrewAI, Vercel AI SDK, PydanticAI, AutoGen and many other frameworks and providers. | The integrations directory lists tools including Open WebUI, Cline, LangChain, Vercel AI SDK, and Zapier as compatible with OpenRouter. |
| SDKs | Official SDK documentation is provided for Python, JavaScript/TypeScript, Go and Java. | The quickstart lists OpenRouter client SDK installation options for TypeScript and Python. |
LangSmith plans
- DeveloperFree
- Plus$39 a month
- EnterprisePriced on request
OpenRouter plans
- BusinessFree
- FreeFree
- StandardFree
- EnterprisePriced on request
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 OpenRouter if…
OpenRouter suits developers and teams who want to access multiple AI models through one API. Its listed plans address indie hackers, AI-native startups, growing teams and enterprises, with regional routing options for business requests.