
AI sales platform for B2B prospecting, lead gen, and deal automation.

AI Agent & LLM Observability Platform
Apollo.io: AI sales platform for B2B prospecting, lead gen, and deal automation.. LangSmith: AI Agent & LLM Observability Platform. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. Apollo.io is freemium and LangSmith is freemium.
The best choice between Apollo.io and LangSmith depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Both are primarily designed for individuals. The choice depends on which specific features you need.
Apollo.io offers: Outbound Prospecting, Inbound Lead Qualification, Data Enrichment, Deal Execution. LangSmith offers: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts.
Based on our data, LangSmith currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.