Lemlist has significantly boosted outbound reply rates by utilizing AI voice notes powered by ElevenLabs, which allow for scalable and personalized voice messaging in sales outreach. The integration of this technology has led to a 20% increase in engagement among early adopters, as voice messages generate twice the reply rate compared to traditional text-only outreach. Voice messaging is highlighted as an effective method to build trust and create genuine connections, while AI technology addresses the challenge of scalability by automating the creation of natural-sounding voices. This approach enables sales teams to efficiently personalize messages at scale, leading to more interactions, replies, and potentially increased revenue, while maintaining the authenticity and human touch that foster deeper relationships with prospects.