LangSmith
8.0#1 in llm gateway software$39 usage-basedFree planWebAPILinuxmacOS
VisitLangSmith vs Prompt Builder
Prompt Builder
5.0#11 in prompting toolWebLinuxmacOSWindows
VisitLangSmith plans
- DeveloperFree
- Plus$39 a month
- EnterprisePriced on request
Prompt Builder plans
No prices published.
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 Prompt Builder if…
You want what its maker publishes above — check its page for the details.