Smallest AI's Lightning is a real-time text-to-speech API delivering ~100ms latency with expressive voices and voice cloning from 5–15 seconds of audio. Murf AI targets studio-style voiceover production; Lightning is the stronger choice for developers building live voice agents and real-time applications where speed and API access matter.
Lightning Text-to-Speech
Hyper-realistic, expressive voices with ~100ms latency, built for real-time agents and long-form narration alike.
30+ Languages
Natural, human-like speech across 30+ languages, with voice cloning from just 5–15 seconds of audio.
Enterprise-Grade Compliance
SOC 2 Type II, GDPR, ISO 27001, and HIPAA-ready — with a Business Associate Agreement available for healthcare deployments.
Features
Benchmarks
Naturalness scores (higher is better) from listener evaluation. Source: Smallest AI Lightning v3.1 Pro model card.
Frequently
asked questions
Is Murf Falcon the fastest TTS API?
Does Lightning support professional voice cloning?
How much does Murf AI cost for voice agents?
What does switching from Murf to Lightning involve?