lemlist doubles outbound reply rates at scale with AI voice notes powered by ElevenLabs

LinkedIn voice messages outperform text by a significant margin, yet most sales teams avoid them due to the manual effort required. lemlist's outbound team discovered this firsthand through a simple experiment: adding a personalized LinkedIn voice message into their outreach sequence doubled the reply rates.

The experiment validated voice messaging as a powerful outreach method. It builds trust, feels genuine, and interrupts the typical pattern of impersonal sales messages. However, recording individual voice messages for every prospect quickly proved unsustainable.

Scaling personalized voice messaging with AI

To solve this challenge, lemlist partnered with ElevenLabs, leveraging our Text to Speech model and Voice Cloning technology to create natural-sounding voices and automate personalized voice messaging on LinkedIn.

“Our top priority at lemlist is to help our customers book more meetings with their prospects. What we’ve seen work the best is standing out in the cluttered inboxes and creating a relationship with personalized approaches. Voice is underused (making it perfect to break patterns) and brings a stronger human touch, creating more trust with prospects.

But, it had never been scalable until our partnership with ElevenLabs - our customers now get more replies (at scale!), resulting in more meetings and revenue. If our customers are more successful, we will be more successful.” - Kévin Moënne-Loccoz - VP Product & Design @lemlist

How it works

1. Seamless Integration: Embed LinkedIn voice notes directly into lemlist’s existing multichannel campaigns.
2. Smart Personalization: Use dynamic variables to adapt a single voice script into hundreds of individually tailored messages.
3. Voice Cloning in Minutes: Quickly clone your voice - or choose from high-quality pre-built voices - in under two minutes.
4. Multilingual Capabilities: Generate voice notes in any language, maintaining the exact tone and authenticity of your voice.
5. Optimization Tools: Preview, A/B test, and edit voice notes to continuously improve and amplify results.

See a full walkthrough here: I wish I knew about ElevenLabs AI voice notes for outreach sooner

Real outcomes: more engagement, efficiency & trust

lemlist has seen strong early signals after integrating with ElevenLabs' technology:

• Overall engagement has increased up to 20% among early adopters, with more campaigns launched and more frequent platform usage.
• Voice note campaigns consistently generate more interactions, more replies, and higher intent responses, which are leading indicators of activation and revenue.

Meanwhile, lemlist’s users are experiencing the benefits of personalized voice messaging without the usual drawbacks:

• Increased Engagement: Voice notes receive 2x higher reply rates compared to text-only DMs, capturing attention and driving conversions.
• Time Efficiency: SDRs save hours previously spent recording repetitive voice messages, enabling them to focus on higher-value tasks.
• Trust and Authenticity: AI-generated messages retain a genuine human feel, fostering faster rapport and deeper connections with prospects.

Voice messaging sets outreach apart while AI makes it scalable. With lemlist's AI-powered solution, meaningful connections and higher reply rates are now possible at scale.

Looking to build with voice AI at scale? Get in touch here.