Bulk voice calls vs conversational bulk calls
In India, "bulk calling" usually means a recorded announcement played to thousands of numbers. It is cheap and fine for one-way news. But the moment you need an answer — will you attend, do you confirm this order, when can you pay — a recording cannot help. Conversational bulk calling puts an AI agent on every call so each person can actually reply.
| Option | Two-way? | What you get back | Best for |
|---|---|---|---|
| Bulk SMS | No (links only) | Delivery reports, clicks | Short notices |
| Voice broadcast (Outpero offers this) | No | Answered or not answered | Announcements, simple reminders, offers, alerts |
| AI bulk campaign (Outpero) | Yes, natural speech | Transcript, summary, sentiment and custom fields for every call | Confirmations, reminders that need a reply, surveys, reactivation |
Outpero's voice broadcast plays one fixed message — an audio file you upload, or text synthesised in Outpero's voices — and ends the call. It is billed at a lower rate than AI conversation minutes. Use it when nobody needs to reply, and AI campaigns when the reply changes what you do next.
How an AI bulk campaign works on Outpero
- 01Prepare the CSV: one number per row, with names and whatever details the call is about.
- 02Write the agent's brief: the purpose of the call, what to ask, and the fields to capture.
- 03Set the schedule and calling window, and retries for numbers that do not pick up.
- 04DND screening runs on the list before calls go out.
- 05Choose your channels: each is one call at a time, the number includes 1 and each extra is ₹649/month.
- 06Watch outcomes arrive in the dashboard; export CSV or receive each call at your webhook.
List hygiene before you upload
- —Remove duplicates, so nobody gets the same call twice in one campaign.
- —Standardise numbers to one format (10 digits, or +91 followed by 10 digits) and drop obviously invalid entries.
- —Take out everyone who has asked not to be called, across all your past campaigns.
- —Split the list by language, so each contact hears Hindi, Tamil, Marathi or whichever language they speak.
- —Keep only contacts with a reason to hear from you — customers, applicants, people who enquired. A clean list of 2,000 beats a dirty list of 20,000.
How fast a bulk campaign finishes
Speed is concurrency (your channels) divided by call length. By simple arithmetic, 20 channels averaging two minutes per call, including ringing, come to roughly 600 attempts an hour; at 5 channels it is about 150. Each extra channel adds to that. In practice connect rates, retries and your calling window decide how long a whole list takes — not the software.
Bulk calling use cases
- —COD order confirmation for D2C brands before dispatch, to cut RTO.
- —Appointment reminders for clinics and diagnostic labs the evening before.
- —EMI and payment reminders for NBFCs and microfinance lenders.
- —Insurance and gym membership renewal reminders.
- —Event and webinar reminders, with the link sent on WhatsApp.
- —Feedback and NPS surveys after delivery or service.
- —Reactivation campaigns to customers who have not bought in six months.
Bulk calls generate callbacks. When people ring the number back, Outpero's AI employee answers 24/7 and handles the conversation, so a campaign does not leave a trail of unanswered returns.
Hear it on a real call before you read further?
Bulk calling in Hindi and regional languages
A bulk campaign across Maharashtra, Karnataka and Tamil Nadu needs Marathi, Kannada and Tamil, not a single Hindi recording. Outpero's agents speak Hindi, Telugu, Tamil, Marathi, Kannada, Malayalam and Indian English with natural English switching. Split lists by language and run them as separate campaigns. Bengali, Gujarati, Punjabi, Odia, Urdu and Assamese are not available for AI conversations.
नमस्ते, मैं StyleKart से बोल रही हूँ। आपका ₹1,299 का COD order कल dispatch होना है — क्या मैं इसे confirm कर दूँ?
Bulk calling cost
Outpero's Standard tier at ₹5 per connected minute suits bulk AI campaigns; Premium is ₹6.8. There is no setup fee, no monthly base and no contract; 1 credit = ₹1 and credits never expire. Unanswered calls are not billed, and a dedicated number is ₹649/month.
| Campaign | Connected calls | Average length | Tier | Talk-time cost |
|---|---|---|---|---|
| COD confirmation | 2,000 | 1 min | Standard | ₹10,000 |
| Appointment reminders | 800 | 1.5 min | Standard | ₹6,000 |
| Renewal reminders | 500 | 2 min | Standard | ₹5,000 |
For comparison, a human telecaller at ₹18,000 a month makes one call at a time, so a 2,000-number list is spread across many working days.
DND, DLT and bulk calling rules
Bulk calling is where TRAI enforcement bites hardest. Under TCCCPR 2018, promotional bulk calls — recorded or AI — cannot go to DND-registered numbers, senders must be DLT-registered, and TRAI has directed operators to disconnect unregistered senders making promotional calls. Transactional and service calls — order confirmations, appointment reminders, payment reminders on an existing account — are the safer, more useful core of bulk calling. Outpero screens bulk lists against DND and calls from a DLT-registered line; consent for the list is yours.
Choosing bulk calling software
- —Does it offer both a cheap one-way mode and a conversational mode?
- —Is DND screening automatic?
- —Can you set calling windows and retry rules?
- —What are the concurrency limits per campaign and per account?
- —Is billing per connected minute or per dial attempt?
- —What happens when people call the number back?
When bulk calling is the wrong tool
If the message is long, detailed or needs a document, WhatsApp or email is better than any call. If each contact needs a tailored negotiation, a bulk tool of any kind is the wrong shape — that is a job for people. Bulk calling works when the message or the question is the same for everyone and only the answers differ.