What is first response time (FRT)?

First response time (FRT) is the time from a customer's first message to the first substantive reply, usually reported as a median or an average per channel: email, chat, phone, social. "Substantive" is doing the work in that sentence. An auto-acknowledgment ("We got your message") does not count under most definitions, because it answers nothing.

It matters because speed is the metric customers notice first and the one AI changes most. An AI agent replies in seconds, around the clock, so a channel it handles reports a first response time near zero. That is real for the questions it answers and misleading for the ones it hands off: the visitor's substantive reply from a person may come an hour later, and a dashboard that averages both hides it. Published benchmarks differ by channel by an order of magnitude; the benchmarks post lists them.

Where definitions split: whether an AI reply counts as the first response at all. Vendors say yes, which makes their figures look remarkable. Teams that want to know how long a person takes should measure human first response time after a handoff separately, from the moment of escalation to the first teammate reply, and report it beside the AI's instant figure rather than blended with it. Where it runs out: FRT says nothing about whether the reply helped. Pair it with resolution rate and CSAT, or a fast wrong answer scores perfectly.