Callnai is a 24/7 AI-powered voice receptionist service. It answers your incoming calls, answers client queries, books meetings directly on your calendar, and blocks telemarketers or spam callers automatically.

How does the calendar scheduling work?

You connect your Google Calendar to Callnai in one click. When a caller wants to book an appointment, the AI checks real-time slots, proposes dates/times, collects their details, logs the meeting, and hangs up politely.

What are Model Context Protocol (MCP) integrations?

MCP is an open standard that lets the AI voice agent safely query your company database, ERP, or CRM during a call. For instance, the assistant can query order status or check product stock levels live for the caller.

Does it filter robocalls and spam?

Yes. Callnai features built-in spam defense. It identifies robocalls, telemarketers, and solicitors, handles them politely, logs them as spam, and terminates the call immediately so your lines stay clean.

How natural does the AI voice sound?

We use next-generation, ultra-low-latency realtime streaming models that sound incredibly natural, carry correct inflections, and handle conversational context without lag or robotic pauses.

Next-Gen Voice AI Receptionist

Never Miss a Customer Call With 24/7 AI

Callnai fields your incoming business calls with custom-trained, natural voice agents. Book calendar meetings, answer FAQs, filter robocall spam, and route urgent calls instantly.

Open App Connect with us

Zero Latency LiveKit Audio

Google Calendar Sync

Automatic Spam Defense

Inbound Call

+1 (555) 234-5678

Active Demo

Hi, I'd like to book an appointment for dental cleaning this Friday afternoon.

Sure! I can help you book that. I see a slot open at 2:00 PM on Friday. Would that time work for you?

Yes, 2:00 PM works perfectly. Let's lock that in!

Google Calendar: Appointment Booked for 2:00 PM Friday

Duration: 0:42Synced with CRM

The Cost of Unanswered Calls

62% of Calls to Small Businesses Go Unanswered.

When clients call your business and get sent to voicemail, they rarely call back—most immediately call your competitor. Callnai answers instantly in a natural voice, booking clients and defending your line.

Unanswered Leads

Missing a call means missing a booking, sale, or appointment. Voicemail is a lead-killer. Callnai keeps clients engaged, schedules them via Google Calendar, and saves the deal.

Spam Defense

Telemarketers, spam robocalls, and solicitors interrupt your focus and drain productivity. Callnai filters them automatically, hanging up politely and logging them without disturbing you.

Core Assistant Metrics

100%

Answer Rate

Every call fielded instantly, 24/7

< 1s

Response Latency

Ultra-fast natural conversational pace

60%+

Lead Retention

Keep callers engaged instead of going to competitors

24/7

Receptionist

Always available, nights, weekends, and holidays

Trusted by 100+ local businesses & agencies globally

Simple Setup

Deploy Your Assistant in 4 Simple Steps

No complex coding or machine learning experience required. Set up in less than 10 minutes.

1. Provision Your Number

Get a dedicated Twilio business phone number in seconds, or route calls from your existing office line.

2. Define AI Guidelines

Instruct your voice receptionist on how to represent your business, answer FAQs, and handle specific client needs.

3. Link Integrations

Connect Google Calendar to enable real-time booking, or plug in custom HTTP/SSE MCP servers to query your database.

4. Go Live 24/7

Your voice agent answers calls immediately. Access call summaries, full transcripts, and spam filters inside the dashboard.

Dynamic MCP Integrations

Connect external systems seamlessly using Model Context Protocol (MCP). Your AI receptionist can look up active orders, check warehouse inventory, or update customer tickets in real-time.

Enterprise-Grade Security

We handle authentication, webhook handshakes, and call recordings using encrypted protocols to ensure your data and your callers' privacy remain completely secure.

Open App Connect with us

Start with our free trial on the basic plan.

Client Reviews

Real Businesses. Real Efficiency.

Hear from dentists, restaurant managers, and agencies automating calls with Callnai.

“Callnai fields our patients' calls during lunch breaks and after-hours. It automatically books cleanings on our Google Calendar. Our booking rates are up 30% without hiring extra staff.”

Dr. Sarah Miller

Owner, Miller Dental Practice

Healthcare

“Our restaurant was losing customers because we couldn't pick up the phone during the evening rush. Now Callnai answers instantly, answers table/FAQ queries, and routes urgent catering calls to me.”

David Ross

General Manager, Bistro Bistro

Hospitality

“We were plagued by constant telemarketer and robocall spam. Callnai's automatic spam defense filters them out completely. We save hours of productive time every single day.”

Maria Torres

Operations Director, CleanCo

Local Services

Simple Pricing

Choose the Perfect Plan for Your Business

Unlock unlimited assistants, custom integrations, and calendar sync. Find the ideal fit to field your incoming leads.

Standard Plan

For small businesses starting with voice AI

Free/ forever

1 Custom Voice Assistant
Standard voice library
Standard call handling
Basic transcripts & call logs
Community support

Open App

Active / Recommended

Agency Plan

For growing businesses & agencies

Premium/ contact for billing

Unlimited AI Voice Assistants
Ultra-low latency LiveKit engine
Google Calendar scheduling sync
Custom HTTP/SSE MCP server tools
Interactive analytics & graphs
Advanced spam defense & routing
Priority founder support

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FAQs

Your Questions, Answered

Everything you need to know about Callnai.

Still have questions?

We are here to help you get started or explain custom integration details.