AI voice agents for business: what they are, what they do and how to launch one
An AI voice agent is software that holds a real phone conversation for your business: it answers inbound calls and places outbound calls, understands what the caller says in natural language, answers from your own information, takes actions such as booking an appointment or updating your CRM, and hands the call to a person when it should. Jelliu lets you launch AI voice agents without code, in English, Spanish and Portuguese, and follow up the same conversation on WhatsApp, email or web chat. Start on the Free plan (15 voice minutes every month, no credit card); paid plans start at $99/month.
What is an AI voice agent?
An AI voice agent is an autonomous AI agent whose main channel is the phone. Unlike a phone menu (IVR) that asks callers to press 1 or 2, or a voicemail that only records a message, a voice agent listens, understands the request, replies in a natural voice and gets the task done during the call. Businesses use them as an AI receptionist, an AI answering service, an AI SDR that calls leads, or a full AI call center.
How AI voice agents work
- Listen: the agent hears the caller and turns speech into text in real time.
- Understand: it works out what the caller needs, using the instructions, tone and limits you wrote for it.
- Answer: it replies in a natural voice with your own information — website, FAQ, services, prices and hours.
- Act: it books, moves or cancels appointments, looks up and updates records in your CRM, and triggers your tools through integrations, API, webhooks or MCP.
- Follow up: after the call it can send a WhatsApp message or an email with a confirmation, address or link, and it saves a summary and transcript of every call.
- Hand off: when a case needs a person, it transfers the call to the number or team you chose, with the context.
What AI voice agents can do for your business
- Answer every call 24/7, including after hours and when the line is busy — see <a href="/ai-agents/ai-answering-service">AI answering service</a> and <a href="/ai-agents/ai-receptionist">AI receptionist</a>.
- Book, confirm and reschedule appointments on your calendar — see <a href="/ai-agents/appointment-scheduling">appointment scheduling</a>.
- Call and qualify new leads within minutes, then book the meeting — see <a href="/ai-agents/lead-qualification">lead qualification</a> and <a href="/ai-agents/ai-sdr">AI SDR</a>.
- Run outbound call campaigns for reminders, renewals, surveys and offers — see <a href="/ai-agents/outbound-campaigns">outbound campaigns</a>.
- Resolve support questions and escalate the rest — see <a href="/ai-agents/customer-support">customer support</a>.
- Make polite, consistent payment reminder calls — see <a href="/solutions/collections">collections</a>.
AI voice agents by industry
The same agent adapts to how your industry uses the phone: healthcare and clinics (booking, reminders, after-hours calls), real estate (instant lead response and showings), e-commerce (order status and cart recovery), insurance (quotes and renewals), collections and fintech and BPO and contact centers.
How to choose an AI voice agent platform
Start with who will build and run the agent. Developer platforms such as Vapi, Retell AI and Bland AI give engineers APIs to assemble their own voice product. No-code builders such as Synthflow focus on getting a phone agent live quickly. Enterprise vendors such as PolyAI serve large contact centers on annual contracts. Jelliu is a no-code platform for business teams that need voice plus WhatsApp, email and chat, outbound campaigns and a CRM in one place.
Then check: the languages your customers speak; whether the agent can act in your calendar and CRM, not just talk; call transfer to people; outbound campaigns; transcripts and analytics; pricing you can predict; and whether you can run it privately. Our voice AI platform comparison 2026 puts the main options side by side.
How to launch an AI voice agent with Jelliu
- Create an agent: describe its job, tone and limits, or start from your website. Pick its voice.
- Add your knowledge: FAQ, services, prices, hours and policies.
- Connect your calendar and CRM, or use the API, webhooks and MCP.
- Get a phone number, make a test call on your own phone and adjust.
- Go live on inbound calls, or upload a list and launch an outbound campaign, and watch results in live analytics. You can also manage everything <a href="/ai-agents/manage-from-whatsapp">from a WhatsApp chat</a> with Bop, Jelliu's assistant.
Pricing and private deployment
Jelliu has a permanent Free plan with 15 voice minutes every month, no credit card, so you can try an AI voice agent before paying. Paid plans start at $99/month with voice minutes included — see pricing. Companies that need to keep calls and data in their own environment can run Jelliu on their own servers or private cloud — see private AI voice agents.
AI agents by industry
Real estate · Law firms · Auto dealerships · Gyms & fitness studios · Hotels & vacation rentals · Property management · Salons & spas · Recruiting & staffing · Plumbers · Dental & medical clinics · Home services & HVAC · E-commerce · Insurance · Restaurants
Guides
WhatsApp AI agent · How to build an AI agent · AI agent vs chatbot · AI cold calling · AI appointment setter · AI voice agent pricing · AI receptionist cost · AI agents for small business
Frequently asked questions
Launch your first AI voice agent
Free plan: 15 voice minutes every month. No code.