Powering real-time text-to-speech that keeps conversations moving.
Human-like voices
Consistently Top-3 on Hugging Face TTS Arena in blind A/B — the same model you access via API. Real samples, no post-processing: what you hear in the demo is what ships in production.
10 times cheaper than competitors
Straighforward pay-as-you-go pricing starting from $0.5 per hour with no hidden fees. Free tier included, so you can start building without a credit card.
Ultra-low latency (just 166 ms TTFB!)
Best latency-to-quality ratio among low-latency leaders. Our model starts audio ~34% faster than ElevenLabs and ~74% faster than Cartesia (median TTFB 0.166 s vs 0.253 s / 0.628 s), while staying close on perceived quality (Elo 1514 vs 1598 ElevenLabs).
Enterprise reliability
99.9% uptime SLA, SOC 2 compliant infrastructure, and dedicated support. Scales seamlessly from prototype to millions of requests without breaking a sweat.
Drop-in integrations for popular frameworks. Get started in minutes.
Open-source framework for voice and multimodal AI agents
Real-time audio/video infrastructure for AI applications
Build voice experiences for calls, IVR, and contact centers
Workflow automation for voice-powered applications
A no-code AI workflow tool built for creative freedom
Multiple conversation contexts over a single connection. Perfect for parallel agents and complex workflows.
Drop-in audio player widget for your website. Preview voices directly in your UI with zero configuration.
Define exact pronunciations using IPA phonemes. Perfect for brand names, technical terms, and acronyms.
Pronounce numbers digit-by-digit for phone numbers, codes, and serial numbers.
Insert precise pauses with the <break> tag. Control timing for natural speech rhythm.
Fine-tune speech rate and consistency. Balance expressiveness with predictable output.
Create a natural-sounding voice clone instantly. No training, no waiting. Upload a short audio clip and get a production-ready voice in seconds.
Reach global audiences with native-quality speech in major world languages. Same API, same voices, consistent quality across markets.
Formerly known as AsyncFlow 1.0 - оur fastest model, designed for real-time and low-latency applications such as conversational AI and voice agents. Async Flash delivers instant responses with natural prosody, optimized for speed and responsiveness where every millisecond counts.
Built for premium voice quality and expressive pronunciation, Async Pro offers richer tone, clarity, and realism. While slightly slower than Flash, it’s ideal for content generation, storytelling, and scenarios where naturalness outweighs latency.
Async runs on hardened, enterprise infrastructure with global partners to meet your volume and latency requirements from day one. We back this with 24/7 SLAs, advanced security controls, and a privacy-first data policy that keeps your content out of model training.
