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📞 Voice Calls (OBD)

Automated Bulk Voice Calls
at Scale

Connect with thousands of customers instantly through pre-recorded voice messages. High delivery, IVR support, multilingual, and real-time call reports. No operator dependency.

Start Voice Calling ⚡ Book a Demo
What is OBD Voice?

Reach Customers with
Automated Voice Messages

Outbound Dialling (OBD) lets your business send pre-recorded voice messages to thousands of customers automatically. No need to depend on operators or manual reminders — simply record your voice message, upload the contact list, and our system will call the customers as scheduled.

In today's fast-paced world, communication needs to be quick, direct, and impactful. Voice calls ensure your message is heard loud and clear — through their ears, in the most personal way.

  • Upload contact list & schedule calls in advance
  • Pre-recorded MP3/WAV audio upload
  • IVR keypress response collection (Press 1/2)
  • Auto-retry for unanswered calls
  • Hindi + all major regional languages
  • Real-time call delivery reports
  • REST API for automated dialling
  • Works across all Indian telecom operators
📞 How a Voice Campaign Works
1
Upload Audio & Contacts
Record your message in MP3/WAV, upload contact list via CSV
2
Schedule Campaign
Set date, time, and retry settings. System auto-dials as scheduled
3
Calls Go Out Automatically
Customers receive the call, hear your message, respond via keypress (IVR)
4
Track Results in Real-Time
Monitor answered, unanswered, IVR responses in live dashboard
Complete Voice Solutions

Everything You Need for
Voice Communication

Choose from our comprehensive suite of voice calling features designed for every business need.

Simple IVR
Play pre-recorded voice messages without collecting inputs. Ideal for bulk campaigns like announcements, alerts, promotions, and reminders.
1 2 3
DTMF Input
Allow customers to respond using keypad options like "Press 1" or "Press 2". Capture customer choices in real time in detailed call reports.
Call Patch
Instantly transfer calls from IVR to your support or sales team. Ensure customers connect with live agents for quick and efficient assistance.
TTS (Text-to-Speech)
Convert text into natural-sounding voice messages automatically. Personalize calls using variables like customer name, amount, or date.
Custom IVR
Advanced IVR for banks, enterprises, and large organizations. Supports multi-level menus, complex routing, and priority call handling.
Smart Scheduling
Schedule voice calls in advance by selecting exact date and time. Automate reminders, alerts, and campaigns for better pickup rates.
How It Works

Your Voice, Delivered
to Every Customer

One campaign reaches thousands — automatically, instantly, personally.

Upload Audio

Record in Hindi or English. Upload MP3/WAV to the panel

Add Contacts

Import unlimited contacts via CSV — no cap on recipients

Schedule & Launch

Set date and time. System auto-dials as scheduled

11:15
INCOMING CALL
NESARK OBD
+91 98765 43210
"Hello! Press 1 to know our offers
Press 2 to speak to our team"
Decline
Accept
Live Call
Auto Playback

Audio message plays instantly when customer answers

IVR Response

Customer presses 1 or 2 — response captured in report

Live Dashboard

Track answered, missed, IVR data in real-time dashboard

10000s
Calls per minute
10+
Indian languages
MP3
& WAV supported
24/7
Auto delivery
Why Voice Calling?

More Effective than
Traditional Marketing

Paper-based and email-based marketing are extremely ineffective — junk letters go straight in the bin! Voice broadcasts reach customers in a much more direct manner — via their phone. Response rates go up, costs come down.

98%
Call Answer Rate
3x
Better than Email CTR
10000s
Calls Per Minute
10+
Indian Languages
🎯
High Engagement Rate
Voice messages have far higher engagement than email or SMS alone
🌐
Multilingual Delivery
Send voice messages in Hindi, Tamil, Telugu, Marathi, Bengali and more
👤
Personal Touch
A voice message builds stronger trust and connection than text messages
⚡
Scalable & Instant
Send thousands of calls per minute regardless of campaign size
Industries

Who Uses Bulk Voice Calls?

Any business that needs to communicate with large numbers of customers can benefit from voice broadcasting.

🛒

E-Commerce

Order confirmations, delivery updates, and feedback requests through automated voice calls

🏥

Healthcare

Appointment reminders, prescription alerts, and health tips to patients automatically

✈️

Travel

Booking confirmations, check-in reminders, and important travel updates for passengers

🏦

Financial Services

Payment due reminders, account updates, and fraud detection alerts to customers

🎓

Education

Upcoming events, exam schedules, and urgent notices to students and parents

💳

Collections & Recovery

EMI due reminders, overdue payment alerts, and follow-up calls for debt recovery

🏘️

Real Estate

Site visit reminders, new launch announcements, and payment schedule notifications

🗳️

Political & Government

Mass voter outreach, public awareness campaigns, and emergency alert broadcasts

Simple Process

Start Your First Voice Campaign

Get your voice broadcast campaign live in minutes.

1
Sign Up & Get Credits
Create your account at voice.nesark.com and get started with wallet credits
2
Upload Audio File
Record your message and upload in MP3 or WAV format to the panel
3
Upload Contacts
Import your contact list via CSV file with mobile numbers
4
Schedule & Launch
Set date, time and launch. Track live call reports from your dashboard
Start Bulk Voice Calling →
FAQ

Frequently Asked Questions

Everything you need to know about Nesark's Bulk Voice Call service in India.

A voice broadcast is a pre-recorded message automatically sent to customers via telephone. It's an incredibly effective way to communicate with large numbers of people very quickly — ideal for promotions, alerts, reminders, and announcements.
Our advanced systems can send thousands of calls per minute. No matter how demanding your requirements are, we have the capacity to deliver your message on time across India.
For Voice Broadcast you can upload audio in .WAV and .MP3 formats. Nesark also supports TTS (Text-to-Speech) which converts your written text into natural-sounding voice automatically — no recording needed.
Yes. When creating a campaign, use the Campaign Schedule option to select the exact date and time you want calls to start. The system will automatically begin dialling at the scheduled time — no manual action required.
Voice broadcasts reach customers directly via their phone — far more personal than email or printed mailers. Response rates are significantly higher, delivery costs are lower, and a voice message builds stronger engagement than text alone.
Any organization that needs to communicate with large numbers of customers quickly — from e-commerce, healthcare, banking and finance to education, government, logistics, and real estate. If you have customers with mobile phones, voice broadcasting works for you.
Nesark's voice call service starts at ₹2,500 for 10,000 calls. The more you send, the lower the per-call cost. View full Starter, Growth, and Enterprise plans at nesark.com/pricing-plan or contact us for custom volume pricing.
Once you deposit funds, credits are activated in your account within 30 minutes to 1 hour during business hours (Mon–Fri, 10AM–7PM). For urgent activation, contact our support team directly.

Start Reaching Customers by Voice Today

Set up your first voice campaign in minutes. Our team helps you record and upload your audio message — no technical knowledge needed.

Get Voice Call Credits ⚡ View Pricing Plans