Smallest.Ai Unveils Lightning V2 - World's Fastest, Most Human-Like AI Text-To-Speech In 16+ Languages

SAN FRANCISCO, May 21, 2025 /PRNewswire/ -- Foundational AI company Smallest.ai today announced the launch of Lightning V2, a next-generation Text-to-Speech (TTS) model delivering exceptional voice realism, ultra-low latency, and deep customization- engineered to meet the evolving needs of modern enterprises.

Supporting over 16 languages across the US, Europe, the Middle East, and India, Lightning V2 is designed to offer hyper-realistic, multilingual voice synthesis at a third of the cost of every competitor in the market.

With 100ms streaming latency, voice cloning from just 10 seconds of audio, and seamless language switching, it enables real-time, emotionally rich voice experiences across customer support, virtual assistants, booking systems, and more.

Voice That Feels Human- At Scale

Whether it's English with a Midwest accent, Hindi with natural pauses, or Arabic spoken with regional fluency, Lightning V2 delivers voices that are less synthetic and more realistic. Its voice cloning capabilities enable brands to create unique voice identities using a few seconds of sample audio-making it easy to replicate known voices or create localized personas for different regions.

One enterprise customer reported over 50% reduction in call drops and a 70% increase in average call time after switching to Lightning V2- attributing the change to the more natural and trustworthy sound of the new voices.

Built for the Real Demands of Modern Enterprises

Beyond voice quality, Lightning V2 is built on Smallest.ai's Full-Stack Voice AI Platform, a system where the AI model, infrastructure, and application layer are developed in-house. This allows for deep adaptability and control, especially for teams building dynamic voice products.

What is Full-Stack Voice AI?

It means businesses get not just a voice model- but a system that learns, adapts, and evolves with usage. Whether you're powering support lines or integrating into AI agents, Lightning V2 ensures voice responses can flex with context and complexity.

With Lightning V2, businesses can:

Switch prompts on the fly as conversations move through different stages
Tune speech outputs for specific domains like fintech, healthcare, or education
Identify errors in real time and adjust without full model retraining

Its streaming-first architecture, low time-to-first-byte (TTFB), and real-time responsiveness make it ideal for developers building interactive voice systems that need to feel intuitive and immediate.

Why Lightning V2 Stands Out:

16+ supported languages including English (US, UK, Indian), Hindi, Arabic, German, Tamil, Telugu, and more
100ms streaming latency for real-time dialogue applications
Fluent handling of numbers, currency, and special characters
On-premise support for high-compliance environments

"Conversations aren't static. They have stages, emotions, and shifts in intent," said Sudarshan Kamath, Co-founder of Smallest.ai. "Our platform gives teams the tools to adapt the AI mid-conversation, not just before deployment. That's the difference between good voice automation and great customer experience."

And because Smallest.ai trains its own models and controls the application layer, businesses get end-to-end visibility and customization, something rarely available in off-the-shelf AI products.

About Smallest.ai

Smallest.ai was founded in 2023 by Sudarshan Kamath and Akshat Mandloi, after years of building AI for electric vehicles, autonomous systems, and drones across the US, EU, Japan, and India. Their mission is to create foundational multi-modal AI that works in the real world, not just in the lab.

Smallest.ai was founded to answer a simple question: "why do a billion humans not speak to AI every single day?"

From voice interfaces to real-world deployment tools, every product we build brings us closer to making AI more human, accessible, and intuitive- across languages, accents, and cultures.

The company is backed by leading investors including 3one4 Capital, Better Capital, Upsparks Capital, Aarthi Ramamurthy, Michele Attisani, Peercheque, Global DeVC, Tiny VC, and a host of other global angels.

With Lightning V2, Smallest.ai takes a major step toward building intelligent, adaptable, and deeply human voice experiences—redefining how businesses interact with their customers, employees, and systems.

Website: https://smallest.ai/

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SOURCE Smallest.ai

Frequently Asked Questions

What is Lightning V2?

Lightning V2 is a next-generation Text-to-Speech (TTS) model from Smallest.ai, offering realistic voice, low latency, and customization for enterprises.

What languages does Lightning V2 support?

Lightning V2 supports over 16 languages, including English (US, UK, Indian), Hindi, Arabic, German, Tamil, and Telugu.

What is Full-Stack Voice AI?

Full-Stack Voice AI means businesses get a voice model and a system that learns, adapts, and evolves with usage.

First published on Wed, May 21, 2025

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