Introducing telli voices: Authentic voices for every customer conversation

AI voice agents have the potential to scale a sales team’s reach like never before, so why do many businesses hesitate to fully embrace them?

In a recent survey, 76% of respondents said they believe AI voices lack emotion and nuance. They noted that subtle issues like a slightly unnatural tone or a poorly timed pause quickly reduce confidence and make a message feel less trustworthy.

This perception reveals a real gap: AI promises speed, efficiency, and scalability, but often lacks the authenticity needed to build genuine connections.

Until now, businesses felt forced to choose between technical power and emotional impact. But at telli, we believe you shouldn’t have to compromise. That’s why we’re launching telli voices. Our all-new suite of natural, persona-driven AI voices helps your agents connect with customers as authentically as your own team does. Now, you can scale truly authentic conversations without sacrificing trust.

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Why telli voices matter

In the beginning, telli agents relied on voice options from the biggest providers in the space. While these worked well for early use cases, there were minimal high-quality, expressive voice options for non-American languages. Customer feedback also emphasized that with some off-the-shelf solutions, there was room to grow with intonation, pauses, and phrasing — especially critical in sales interactions.

That’s because great sales calls are built on trust. And that trust depends not only on what is said but also on how it’s said, including the tone, timing, and natural flow of the conversation. Even the best script can fall flat if a voice sounds robotic or out of sync.

That’s where telli voices come in.

telli voices capture the subtleties of real human interaction, so customers feel like they’re talking to an actual salesperson. That authenticity has already led to more booked meetings, higher conversion rates, and re-engaged leads.

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How telli voices work

Every sales conversation follows the same secure, seamless workflow:

1. Incoming calls are routed through our telephony system.
2. Real-time speech recognition transcribes the caller’s voice, instantly analyzing intent and sentiment.
3. Our advanced language models, running on secure cloud infrastructure, generate the right response, customized for the context and your brand.
4. Your selected telli voice brings that response to life, delivering it naturally and clearly to your prospect.

telli voices combine real human nuance with the scalability of AI voice agents, fostering live conversations that convert, at scale.

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How to get started

Launching authentic, persuasive AI conversations with telli is simple:

Choose your voice

Begin by selecting the voice that feels right for your brand and sales approach:

Option 1: Browse professionally recorded voice personas

We offer a wide selection of voices from Europe, the UK, and the US, covering a variety of regional accents

Unlike voices designed for podcasts or narration, these personas are built for live, two-way sales conversations. They respond quickly, handle interruptions naturally, and maintain an approachable tone rather than an overly polished one.

Option 2: Clone your own top salesperson’s voice

For businesses that want a voice uniquely their own, telli can clone the voice of a top-performing professional. You can share recorded calls or participate in a two-hour guided session with our team.

With a custom voice clone, your top performer’s familiar tone and confidence can connect with hundreds of prospects simultaneously. This is especially valuable for businesses whose brand identities are closely linked to a recognizable voice, regional accent, or signature style.

Build the perfect agent for every interaction

Once your AI agent has its new voice, you have the flexibility to adapt its delivery for any sales role, campaign, or customer segment. Some examples:

• Quick, energetic delivery keeps momentum high in fast-moving conversations.
• Measured, patient tone works well in complex situations where clarity and care matter.
• Calm, reassuring approach helps put hesitant prospect at ease.
• Steady, knowledgeable presence supports clients in making important decisions.
• Warm, upbeat style re-engages dormant accounts.

These subtle details, such as tone, pacing, and intonation, make each conversation feel genuine. With this depth of customization, outreach sounds natural, trustworthy, and true to your brand.

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What customers can expect

When you implement telli voices, your team and prospects experience immediate, measurable benefits:

Fast go-live: Seamlessly integrate telli voices into your existing sales workflows with minimal setup time so your agents can book meetings or make follow-up calls within days.

Real results: Customers hear natural sounding voices, leading to higher response rates and longer conversations with prospects.

Consistency at scale: Every caller receives the same high-quality, branded experience.

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Ready to find your perfect sales persona?

In the first six weeks since launch, over 90% of telli customers have already adopted telli voices. By capturing the nuances that make conversations feel truly authentic — across multiple languages and regional dialects — telli voices transform routine AI calls into meaningful, high-converting interactions.

And we’re just getting started. We’re expanding into more languages and accents, striving to enhance our voices as technology evolves.

Ready to experience the difference? Book a demo and meet your next top-performing voice.