What is Reply Rate?
Definition: The percentage of prospects who respond to an outbound email sequence, calculated as (total replies / total emails delivered) x 100, serving as the primary effectiveness metric for cold outreach campaigns.
Reply rate is the metric that matters in outbound. Open rates can be gamed (tracking pixels aren't reliable). Click rates depend on whether you included a link. Reply rate measures whether someone cared enough to write back.
Benchmarks for cold email: 2-5% is average. 5-10% is good. 10%+ is excellent and usually means your targeting and personalization are dialed in. Multi-channel sequences (email + LinkedIn) run 15-25% because the extra touchpoints build familiarity.
What drives reply rate up: specificity (mentioning something about their company that shows you did homework), relevance (solving a problem they have right now), timing (reaching them when they're actively evaluating solutions), and brevity (under 100 words for the first email). What kills it: generic templates, wrong persona (emailing a VP about an intern-level problem), and sending to bad data (wrong company, wrong role).
GTM Engineers obsess over reply rate because it's the closest metric to revenue. A 2% reply rate on 1,000 emails means 20 conversations. If 25% of conversations convert to meetings, that's 5 meetings. If 20% of meetings close, that's 1 customer. Improving reply rate from 2% to 5% doesn't just increase replies by 2.5x. It increases pipeline by 2.5x.