Glossary · Letter F
First Response Time
The time between an inbound lead arriving and the first human (or AI) response. Industry data: 78% of buyers pick the first vendor that responds. Pre-AI baseline: 4-6 hours average. With AI: 8-15 seconds. The difference is roughly 3-5x in demo-booked conversion rate. First response time is the single highest-leverage SMB sales metric in 2026.
Speed-to-lead playbook →Related terms
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