Introducing Hertz · v0.1

Voice & video agents
for the AI-native era.

Ship a voice agent that calls, answers, transfers, and books — or drop an AI into a live audio or video room. One API. Zero glue code.

Start building free →   Listen to a demo call Read the docs
Live call · Hertz Demo p95 latency · 324ms · Ashburn 00:18
Nova · Hertz Agent
gpt-4o · eleven_v2 · en-US
Voice
Rachel · Warm
Tools called this session
lookup_calendar book_slot send_sms
Cost$0.0094

Live transcript

streaming
One platform · Four surfaces

Everything voice,
everywhere.

Voice Agents
Inbound, outbound, voicemail, human handoff, calendar booking.
TELEPHONY→
Web Parties NEW
Audio & video rooms with an AI host or co-host. The differentiator.
WEB RTC→
Video Avatars
Real-time lip-synced avatars. Studio quality, WebRTC speed.
BETA→
API & MCP
Drop into Claude, ChatGPT, Cursor as a first-class tool.
OPEN SPEC→
Trusted by teams shipping voice at scale
Harlowe & Co. Meridian Orbital Health Ferris & Sons Northfield Stanhope Alloy
Voice library

Latest from the library.

Explore all voices →
Noah · YA Audiobooks Narrator
Cynical but romantic. Hurt but hopeful. A flawed voice for emotional fiction.
en · 24kHz
Jenna · Warm & Articulate
Warm and articulate. A 30 year old female voice in American English.
en · 48kHz
Raju · Authentic and Relatable
Relatable Indian voice. Familiar warmth and measured tone.
hi-en · 24kHz
Connery · Mature AI Companion
Designed for romantic, one-to-one AI companionship. His calm presence...
en-GB · 48kHz
Beth · Calm, Gentle Nurturing
Gentle and nurturing. A warm, comforting, motherly British English voice.
en-GB · 48kHz
Create or clone a voice
Voice Design
Design an entirely new voice from a text prompt.
Clone your Voice
Create a realistic digital clone of your voice.
Voice Collections
Curated AI voices for every use case.
The shape of the category

Voice that doesn't sound like voice.
Infra that doesn't feel like infra.

2.4B
minutes served / yr
340ms
p95 end-to-end latency
64+
languages · code-switching
0 day
zero-retention mode

Built for every industry
that picks up the phone.

All solutions →

Healthcare

Clinic intake, refills, HIPAA zero-retention.

Sales SDR

Outbound discovery, lead qual, calendar bookings.

Recruiting

Candidate screening, scheduling, availability.

Real estate

Lead follow-up, tour scheduling, listing intake.

Collections

Compliant outreach, payment links, DNC respect.

Support

L1 triage, warm handoff, ticket deflection.

Insurance FNOL

Claim intake, document capture, dispatch.

Restaurants

Reservations, orders, waitlist, multilingual.

Logistics

Dispatch, ETAs, driver check-ins.
It starts with a call.

Give your product
a voice.

Free tier. 300 minutes. No card. Ship tonight.

Start building → Talk to sales