Voice agents that
feel human.
Deploy intelligent speech-to-speech voice agents for customer support, sales, and more. Enterprise-grade text-to-speech and speech-to-text APIs.
Natural speech from text.
Generate natural speech from text with 80+ voices and multiple audio formats. Built for telephony and web — enter text, choose a voice, and press play.
I opened the door, [pause] and froze. <whisper> Something was wrong. </whisper> [long-pause] Then, from behind me, <build-intensity> a sound I will never forget. </build-intensity>
- 80+ natural voices across 25+ languages
- Speech tags for tone, pauses, whisper, and laughter
- PCM, MP3, Opus, FLAC, and WAV outputs
Enterprise-grade transcription.
Accurate transcription for phone calls, meetings, videos, and podcasts. Streaming and batch from one API, with speaker diarization built in.
Солнце ярко светило над рекой, отражаясь в спокойной воде и согревая берега. Птицы пели свои песни сидя на ветвях деревьев, где листья шептали под лёгким ветерком. Дети играли на лужайке и смеялись от радости, создавая атмосферу счастья.
- Entity recognition across medicine, law, and finance
- Inverse text normalization for numbers and currencies
- Streaming and batch endpoints, speaker diarization
Natural speech
from text.
Generate natural speech from text with 80+ voices and multiple audio formats. Built for telephony and web — enter text, choose a voice, and press play.
- 80+ natural voices across 25+ languages
- Speech tags for tone, pauses, whisper, and laughter
- PCM, MP3, Opus, FLAC, and WAV outputs
Enterprise-grade
transcription.
Accurate transcription for phone calls, meetings, videos, and podcasts. Streaming and batch from one API, with speaker diarization built in.
- Entity recognition across medicine, law, and finance
- Inverse text normalization for numbers and currencies
- Streaming and batch endpoints, speaker diarization
I opened the door, [pause] and froze. <whisper> Something was wrong. </whisper> [long-pause] Then, from behind me, <build-intensity> a sound I will never forget. </build-intensity>
Солнце ярко светило над рекой, отражаясь в спокойной воде и согревая берега. Птицы пели свои песни сидя на ветвях деревьев, где листья шептали под лёгким ветерком. Дети играли на лужайке и смеялись от радости, создавая атмосферу счастья.
The full voice stack.
Everything you need to build production voice experiences — from realtime agents to batch transcription.
Realtime voice agents
Full-duplex conversations with sub-second latency
Text-to-speech
Natural speech from text across 80+ voices
Speech-to-text
Accurate transcription with speaker diarization
Tool calling
Call APIs and take actions mid-conversation
Custom voices
Clone or create voices for your brand
25+ languages
Multilingual with natural intonation per locale
Sub-second latency
Fast enough for real conversations at scale
Speech tags
Control whisper, laughter, pauses, and tone
Speaker diarization
Identify who said what in multi-speaker audio
Streaming & batch
Realtime WebSocket or async batch processing
Multiple audio formats
PCM, MP3, Opus, FLAC, WAV, and more
Session control
Dynamic instructions, context, and tool updates
Enterprise ready
SOC 2, HIPAA eligible, and GDPR compliant
Text normalization
Proper formatting of numbers, dates, addresses
Interruption handling
Natural turn-taking with barge-in support
80+ voices across 25+ languages.
Multilingual voices with natural intonation. Preview any voice instantly.
Simple, transparent pricing.
Straightforward usage-based pricing with no hidden fees, minimums, or forced upgrades.
Realtime
Real-time voice conversations over WebSocket
Text to Speech
Convert text to natural speech
Speech to Text
Transcribe audio files and live streams
Need higher limits or rollout help?
Talk with Caether about onboarding, custom limits, and enterprise deployment.
Trust, controls, and deployment support.
Enterprise-ready controls, compliance, security, and scale.
Contact SalesAudited controls for security, availability, and confidentiality.
BAA available for healthcare applications handling protected health information.
Data processing agreements and EU data residency options.
Multi-region infrastructure for enterprise workloads.
Concurrent session and request limits scaled to your traffic.
SAML SSO, role-based access, and audit logging for your team.
Enable zero data retention for your deployments.
Ready to build with voice?
Get an API key and start building in minutes, or talk to our team about enterprise deployment.
Sub-second latency · 25+ languages · $0.05 / min