Choose LangSmith if you need
- Integration with OpenAI SDK, Anthropic SDK or Vercel AI SDK. We haven't found them on PromptLayer's website.
At a glance
- Both have a free plan.
- LangSmith's lowest paid plan is Plus at $39 per seat per month, then pay as you go, as of November 14, 2026.
- PromptLayer's lowest paid plan is Pro at $49 per month, as of November 14, 2026.
- They list no integrations in common.
- Both list SSO.
- Only PromptLayer lists SOC 2, GDPR and HIPAA.
- PromptLayer has a public API. We haven't confirmed one for LangSmith.
- Both can be self-hosted.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose PromptLayer if you need
- Integration with Claude Code. We haven't found it on LangSmith's website.
- SOC 2, GDPR or HIPAA. We haven't found them on LangSmith's website.
LangSmith
Nobody has reviewed LangSmith yet. Its rating shows once it has 3 reviews.
Review LangSmith
PromptLayer
Nobody has reviewed PromptLayer yet. Its rating shows once it has 3 reviews.
Review PromptLayerThe facts
- What it does
- LangSmithComplete AI agent and LLM observability platform with tracing and real-time monitoring.
- PromptLayerThe prompt CMS, eval harness, and observability stack for AI engineering teams.
- Free plan
- LangSmithYes
- PromptLayerYes
- Pricing
- LangSmithNot confirmed
- PromptLayerNot confirmed
- Paid plans from
What they share
From the platforms and integrations each website lists.
Integrations
BothNone in common
Only LangSmith
- OpenAI SDK
- Anthropic SDK
- Vercel AI SDK
- LlamaIndex
- PagerDuty
- OpenTelemetry
Only PromptLayer
- Claude Code
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between LangSmith and PromptLayer yet.
Used either of them?
Your review makes this comparison better for the next person. Review LangSmith or review PromptLayer.