Voice agents that answer every call.
Callwisp builds AI agents that pick up instantly, talk like your best rep, book appointments, answer questions from your own knowledge and hand off to a human when it matters — around the clock, in 55+ languages.
Everything a great phone agent needs
Natural, interruptible speech
Streaming speech recognition and voice generation with barge-in, so callers can interrupt and the agent adapts mid-sentence.
Visual call flows
Design structured conversations — collect details, branch on intent, call your APIs — or let the agent talk freely from a prompt.
Knowledge bases
Upload documents, paste text, add URLs or Q&A pairs. The agent answers from your content, not guesses.
Human handoff
Transfer to a person or department the moment a caller needs one, with the context already captured.
Bring your phone system
Connect over SIP to Twilio, Asterisk or any PBX. Each agent gets its own SIP address.
Web calls
Let visitors talk to your agent straight from the browser — no phone, no app, one click.
Transcripts & summaries
Every call is recorded and transcribed, with an AI summary emailed to your team after it ends.
55+ languages
Pick from a library of natural voices per language, with emotion and speaking-speed control.
From idea to answering calls in four steps
- Create — Start from a template or a blank agent. Name it, choose its voice and language, and describe its job in plain words.
- Teach — Add your FAQs, price lists and policies to a knowledge base, and optionally map the conversation in a flow.
- Test — Call it from your browser, listen back, read the transcript and refine the instructions until it sounds right.
- Go live — Point a phone number or your PBX at the agent's SIP address, or embed a web call — and start taking calls.
Questions, answered
What is an AI voice agent?
It's software that answers and makes phone calls on your behalf. It listens to the caller, understands what they need, responds out loud in a natural voice and takes actions — like booking an appointment or transferring the call.
Will callers know they're talking to AI?
Callwisp agents use natural voices and handle interruptions, so conversations flow. We recommend being transparent — many teams have the agent introduce itself as a virtual assistant — and in some regions this disclosure is required by law.
Which languages are supported?
More than 55 languages and accents, each with a choice of voices. An agent speaks the language you configure for it, and you can run separate agents for each market.
Can I keep my existing phone number?
Yes. Your number stays with your current provider. You route calls from it — or from a queue or extension in your PBX — to the agent's SIP address.
How is usage billed?
By the minute of live conversation, billed per second. Every plan includes a monthly allowance, and extra minutes are billed at your plan's rate.
What if the agent can't help?
You decide when it should hand off. The agent can transfer the call to a person or department, and a summary of the call is sent to your team.
What happens to call recordings and transcripts?
They're stored in your account so you can review and improve your agent, and are kept for your plan's recording-history period. You can delete them at any time.
Can I try it before paying?
Yes. The free plan includes 30 minutes and everything you need to build and test an agent from your browser. No credit card needed.