LangSmith
8.0#1 in llm gateway software$39 usage-basedFree planWebAPILinuxmacOS
VisitLangSmith vs ProofHound
ProofHound
6.7#7 in prompting toolFrom $29 a monthFree planWebAPISelf-hosted
VisitWhat both publish
| Fact | LangSmith | ProofHound |
|---|---|---|
| Integrations | Documented integrations cover OpenAI, Anthropic, Bedrock, Gemini, Mistral, LiteLLM, OpenTelemetry, CrewAI, Vercel AI SDK, PydanticAI, AutoGen and many other frameworks and providers. | The site lists Web UI, Webhook, API Token, and MCP as connection options for business systems and AI agents. |
| Purpose | LangSmith is a commercial agent engineering platform for building, testing, deploying, monitoring, and improving AI agents. | ProofHound automates prompt optimization for LLM classification tasks by analyzing error cases, iterating prompts, validating results, and supporting deployment and rollback. |
LangSmith plans
- DeveloperFree
- Plus$39 a month
- EnterprisePriced on request
ProofHound plans
- FreeFree
- Self-hosted open sourceFree
- Pro$29 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 ProofHound if…
ProofHound suits operations, risk, and analyst teams working on classification tasks such as risk control, financial judgment, content moderation, or customer service intent recognition. The self-hosted edition may suit teams that need private deployment and data storage on their own infrastructure.