Talk to your Agents.
The Carbon Voice API is the voice interface your agents are missing — async, voice-first, and ready in seconds.
WHY MESSAGING INTERFACES BREAK DOWN
You've built the intelligence. Now it needs an interface.
You've built a powerful agent, but now it needs an interface to its intelligence.
Messaging is the preferred interface for users. It works from anywhere, it's familiar, and it's easy to connect an agent to a channel your users already live in. A Telegram bot, a WhatsApp integration, an iMessage shortcut. Done.
But when you want to talk to your agents — not type — consumer messaging apps weren't built for that. Voice is bolted on as an afterthought, which means a clunky experience for the end user and more work for the builder: another STT API, another TTS integration, more moving parts between a voice and a response.
There's a better way.
A VOICE INTERFACE BUILT FOR AGENTS
The full stack.
Out of the box.
Talking to your agent should feel as natural as talking to a colleague.
Carbon Voice gives your agent a voice — and you a better way to use it.
Speak your thought, move on, and hear or read the reply when it's ready. No interrupting your thoughts. No waiting on hold. No bolted-on voice notes in a messaging app.
Voice-first. Async-first. Anywhere.
Carbon Voice handles the technical details so you don't have to — speech-to-text, text-to-speech, delivery, and notifications all built in. No extra APIs. No extra accounts. Connect your agent and start talking.
Create a Voice Agent
Name it, paste your webhook URL, give the agent your send API. Done.
Your agent gets a voice
Carbon Voice handles STT in, TTS out. Your agent receives clean text and responds in text.
Your users just talk
Tap to record. Agent replies when ready. Get pinged like any message. Listen anywhere.
BUILT DIFFERENT. ON PURPOSE.
What makes it work
🎙️
Voice-first. Not voice-bolted-on.
Quick tap to record, press-and-hold to send, Play All to catch up. On mobile, desktop with keyboard shortcuts, and Watch. Voice is the default — not the fallback.
⚡️
Async is the superpower.
Real-time voice AI has a fundamental flaw: VAD. Voice Activity Detection struggles to know when you're done thinking versus done speaking. You get cut off. Carbon Voice puts you in control — speak your full thought, tap done, move on. Get pinged when the agent replies.
👥
People and bots. Together
Work rarely happens in a single bot thread. In Carbon Voice, people and agents live in the same conversation layer. Ask your agent something, loop in a colleague, bring the agent back — without switching apps.
📦
The full stack. Months of infra.
Searchable transcripts. Low-network resilience. Listen Later. AI catch-up summaries. Push notifications. iOS, Android, web, desktop. Years of engineering — ready on day one.
BUILT FOR DEVELOPERS. EASY FOR EVERYONE.
Who it's for.
NO-CODE / LOW-CODE
Talk to your agent like
a chief of staff.
You've built an agent in Tasklet or n8n. Now you want to talk to it from your phone — between meetings, on a walk, without opening a laptop. Create a Voice Agent, paste your webhook, start talking.
No engineering required.
DEVELOPER
Give your agent a voice interface worth using.
You're building an agent and want to expose a voice front-end to your users. Point Carbon Voice at your webhook. Your agent gets STT, TTS, and a full mobile — without building any of it. Works with any agent stack.
Works with any agent stack.
WHAT PEOPLE ARE BUILDING
Real conversations.
Real use cases.
The AI Chief of Staff
Replace everything you'd ask an executive assistant — on a walk, in the car, between meetings.
The Research Agent
Speak a question. Get a voice briefing back when it's ready. No sitting at a screen waiting for output.
Email & Calendar Agent
Ask on your commute. Hear the answer before you sit down.
HOW IT COMPARES
Compare what you get.
Title | Carbon Voice | Consumer Apps |
|---|---|---|
Built for voice | Yes — voice-first from the ground up | No — text-first, voice as afterthought |
Async (no interruptions) | Yes — speak, send, get pinged back | No — clunky voice note experience |
Play All / catch-up on the go | Yes | No |
Low-network resilience | Yes | No |
People + bots in one place | Yes — fluid between both | Bots only |
Listen Later | Yes | No |
AI catch-up summaries | Yes | No |
Apple Watch | Yes | No |
Desktop keyboard shortcuts | Yes | Limited |
YOUR AGENT. A VOICE. MINUTES.
Get started in three steps.
Create a free account.
Sign up for Carbon Voice. No credit card required.
Create a Voice Agent.
Name your agent, paste your webhook URL, and provide your send API.
Start talking.
Open Carbon Voice, tap to record, and speak to your agent. That's it.