Houston vs LangSmith
Houston
gethouston.ai
LangSmith
langchain.comSide by side
| Figure | Houston | LangSmith |
|---|---|---|
| Price from | $12/mo | $39/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 3 | 3 |
| Spec score · AI Agent Platforms | 8.4 (#14) | 9.0 (#4) |
| Data use | The privacy policy says Houston does not sell personal information or use agent files, prompts, or messages to train its own models. | LangChain states that LangSmith data is not used to train models and remains owned by the customer. |
| Integrations | Houston advertises more than 1,000 integrations and names Gmail, Slack, QuickBooks, HubSpot, and Google Drive as examples. | Documented integrations cover OpenAI, Anthropic, Bedrock, Gemini, Mistral, LiteLLM, OpenTelemetry, CrewAI, Vercel AI SDK, PydanticAI, AutoGen and many other frameworks and providers. |
| Security | The privacy policy lists HTTPS/TLS in transit, provider-supported encryption at rest, access controls, and audit logging as security measures. | LangSmith's trust center lists SOC 2 Type II, ISO 27001:2022, GDPR and HIPAA compliance. |
Plans
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.