LangSmith vs Traceloop
LangSmith
langchain.comTraceloop
traceloop.comSide by side
| Figure | LangSmith | Traceloop |
|---|---|---|
| Price from | $39/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 3 |
| Spec score · AI Agent Observability Tools | 9.1 (#4) | 8.1 (#18) |
| Spec score · Llm Monitoring | 8.9 (#6) | 8.1 (#14) |
| CI/CD | The evaluation workflow integrates with pytest, Vitest and GitHub workflows for automated regression checks. | Standard and custom evaluations can run on pull requests to enforce quality thresholds before release. |
| Company profile | LinkedIn lists LangChain as privately held, headquartered in San Francisco, with 201–500 employees and 469 employees shown on the page. | LinkedIn lists Traceloop as privately held, founded in 2022, headquartered in San Francisco and employing 2–10 people. |
| Deployment | Deployment provides managed or self-hosted agent servers with streaming, cron scheduling, authentication, MCP support and more than 30 API endpoints. | Traceloop says it supports cloud, on-premises, air-gapped, and other restricted deployments, including Kubernetes environments. |
| Funding | LangChain announced a $125 million Series B at a $1.25 billion valuation on October 20, 2025. | The company’s About page names Y Combinator, Ibex Investors, Sorenson Capital, Samsung Next, Grand Ventures and other backers. |
| Integrations | Documented integrations cover OpenAI, Anthropic, Bedrock, Gemini, Mistral, LiteLLM, OpenTelemetry, CrewAI, Vercel AI SDK, PydanticAI, AutoGen and many other frameworks and providers. | OpenLLMetry supports providers including OpenAI, Anthropic, Bedrock, Gemini, Cohere, Mistral, Ollama and Vertex AI. |
| Rating on G2 | 4.4 out of 5 from 78 reviews. | 5 out of 5 from 2 reviews. |
| Security | LangSmith's trust center lists SOC 2 Type II, ISO 27001:2022, GDPR and HIPAA compliance. | The homepage states that Traceloop is SOC 2 and HIPAA compliant. |
| Self-hosting | Enterprise customers can run LangSmith self-hosted or hybrid on Kubernetes in AWS, Google Cloud or Azure. | Full-platform self-hosting uses Kubernetes with ClickHouse, Kafka, PostgreSQL and S3-compatible storage, including air-gapped deployments. |
| Support | The Developer plan includes community support, and the Enterprise plan lists a support SLA. | The Enterprise plan includes dedicated Slack support, according to the pricing page. |
| Tracing | Tracing records agent conversations and runs step by step, including prompts, model calls, tools, errors, latency and token usage. | One-line instrumentation provides visibility into prompts, responses, latency and request execution traces. |
| What it does | LangSmith is LangChain's framework-agnostic platform for observing, evaluating and deploying AI agents. | Traceloop monitors, evaluates, debugs and tests LLM applications and agents in production. |
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.