Voice AI Is Now Accessible to Every Business
Two years ago, deploying a voice AI agent required a team of engineers, a contract with a telephony provider, weeks of configuration, and a five-figure budget. Today, it takes under an hour and requires no code.
Callsup's voice AI agent lets customers speak to your AI — in the browser, on any device — and get instant spoken responses. The AI listens, understands, responds, and can even hand off to a human if needed.
This guide walks you through the full setup, from account creation to a live, tested voice agent.
What the Voice Agent Can Do
Before setup, understand what you're configuring:
Customer speaks: The customer clicks the microphone button in the Callsup widget and speaks their question in any language.
AI listens and transcribes: Speech is converted to text in real time using a high-accuracy speech recognition model.
AI understands and retrieves: The AI understands the intent, searches your knowledge base for relevant information, and retrieves real-time data (order status, stock) if connected to Shopify or other sources.
AI responds: The AI generates a natural-language response and speaks it back using high-quality voice synthesis. The customer hears the answer within 1–2 seconds.
Escalation: If the AI can't help, it says so clearly and connects the customer to a human — with the full voice transcript visible to the human agent.
Prerequisites
- A Callsup account (sign-up free)
- Your knowledge base documents (policy PDFs, FAQ docs)
- A website or app to embed the widget on (must be HTTPS for voice)
- Optional: Shopify store (for live order data)
- Company name — shown to customers in the widget header
- Industry — helps the AI calibrate its tone (e-commerce, SaaS, hospitality, etc.)
- Support email — used for escalation notifications
- Return and refund policy
- Shipping guide
- Product FAQs
- Troubleshooting guides
- Agent name: The name the AI introduces itself with ("Hi, I'm Aria, your support assistant.")
- Tone: Professional, friendly, or casual — match your brand voice
- Opening message: What the AI says when a voice conversation starts
- Multiple English voices (male/female, different accents: US, UK, Indian, Australian)
- Hindi voice options
- More regional languages (Tamil, Telugu, Bengali) coming soon
- "I want to speak to a person"
- "Give me a human"
- "This is urgent"
- "I want to complain"
- "This is unacceptable"
- Voice icon position: Bottom-right (default) or custom
- Auto-open on voice: If enabled, the widget opens automatically when a customer taps the voice button directly
- Voice message label: The text shown below the microphone icon ("Tap to speak" or "Talk to us")
Step 1: Create Your Account and Company
Go to callsup.ai and create an account. After email verification, you'll land in the dashboard.
Click "New Company" and fill in:
Step 2: Upload Your Knowledge Base
Click your new company → Documents → Upload Document.
Upload your key documents:
For voice specifically: Voice conversations tend to be shorter and more conversational than text chat. The AI works best when your documents include direct, short answers to common questions — not long paragraphs.
For your return policy, instead of:
"Items purchased from our store can be returned within a 30-day window from the date of delivery, provided that the items are unused and in the original condition in which they were delivered to you, with all original packaging and tags intact..."
Structure it as:
Return window: 30 days from delivery
Condition: Unused, original packaging, tags attached
Sale items: Non-returnable
Process: Visit the return portal or ask the chat agent
The AI reads both, but short structured answers create better voice responses (no long run-on sentences spoken aloud).
Allow 1–3 minutes for documents to process. A green checkmark confirms readiness.
Step 3: Configure the Voice Agent
Go to Settings → Agent in your company dashboard.
Agent Persona
Give your voice agent a name and configure its behavior:
Sample opening message for e-commerce:
"Hi, I'm your support assistant. I can help with orders, returns, shipping, and product questions. What can I help you with today?"
Sample opening for SaaS:
"Hi! I'm here to help with questions about your account, our features, or anything you need. How can I assist?"
Keep opening messages short — under 25 words. Long openings feel unnatural in a voice context.
Language Settings
Callsup auto-detects the customer's language. You can also set a primary language default if your customer base is primarily one language.
For businesses serving the Indian market, set primary language to Hindi or English and enable auto-detect — the system will handle language-switching naturally.
Voice Selection
Choose the AI's voice from the available options:
Tip: Pick a voice that matches your brand. A formal legal services brand should use a different voice than a casual D2C fashion brand.
Step 4: Configure Escalation Rules
Go to Settings → Escalation.
For voice specifically, set:
Max conversation turns: If the customer and AI have exchanged more than 6 turns without resolution, offer escalation. ("I want to make sure we get this resolved. Would you like to speak with a human specialist?")
Confidence threshold: If the AI's confidence in its answer is below 70%, it should say so and offer escalation rather than giving a uncertain answer.
Trigger phrases: Words that immediately escalate:
Escalation message (voice): "I'm connecting you with a specialist now. Your conversation history will be shared with them so you don't need to repeat anything. Please hold for a moment."
Step 5: Enable Voice in Widget Settings
Go to Settings → Widget.
Toggle Voice Enabled: ON.
Additional voice settings:
Step 6: Install the Widget
From Settings → Widget, copy the embed script:
``html
src="https://callsup.ai/widget.js" data-company-id="YOUR_COMPANY_ID" defer > Paste this before the closing