Skip to content

Finds your leads.Calls them right away.Follows up until they decide.

Stack19 is an AI workforce for Indian businesses. Its assistant, Vijaya, calls every lead in their own language, carries on over WhatsApp and keeps following up, so your team only talks to people who are ready to buy.

Opening to businesses soon. Book a demo and we will tell you when your place is ready.

Ravi KumarSri Sai Homes, Hyderabad
01:48

నమస్కారం అండీ, నేను Vijaya, శ్రీ సాయి హోమ్స్ నుంచి. ఒక్క నిమిషం మాట్లాడొచ్చా?Hello, I'm Vijaya from Sri Sai Homes. Do you have a minute?

హా చెప్పండి. 2BHK ఎంత అవుతుంది?Yes, tell me. How much is a 2BHK?

Kondapur లో 2BHK అరవై లక్షల నుంచి ఉందండీ. Photos WhatsApp లో పంపమంటారా?2BHKs in Kondapur start at 60 lakh. Shall I send photos on WhatsApp?

పంపండి. శనివారం చూడొచ్చా?Send them. Can I see it on Saturday?

Vijaya, speaking TeluguSite visit booked, Saturday 11:00

Example with made-up names. AI calls are in early access.

Leads we find for you

The Lead Finder looks for businesses that should buy from you, and the Researcher checks each one first.

  • Retail shops in nearby towns
  • Builders and contractors
  • Dealers and distributors

Leads you already get

New enquiries are picked up the moment they arrive.

  • Meta and Instagram ads
  • WhatsApp
  • IndiaMART
  • JustDial
  • 99acres
  • MagicBricks
  • Your website
  • Excel and Google Sheets

A day with Stack19

Find, research, call, WhatsApp, outcome, follow-up. You set the rules once, and your AI workforce runs them every day, while you run the business.

  1. New customers found

    The Lead Finder looks for shops, builders or dealers that fit your business. The Researcher notes what each one sells and where.

    Waiting for your approval
    14 retail saree shops within 40 km, researched
  2. A lead arrives late

    Ravi filled in your Meta ad form. It's after calling hours, so Vijaya sends a WhatsApp message straight away and books the call for the morning.

    WhatsApp to Ravi
    Thanks for asking about Sri Sai Homes. I'll call you tomorrow at 9:30. Here is the brochure.
  3. Vijaya calls

    In everyday Telugu, with the questions you chose: budget, area, when the customer plans to buy. If asked, Vijaya sends photos on WhatsApp during the call.

  4. The outcome is saved

    Interested or not, and why, with every answer recorded on Ravi's page.

    Outcome
    Interested, budget 60–70 lakh, 2BHK in Kondapur, site visit on Saturday at 11
  5. Your salesperson takes over

    Hot leads go straight to the right person on WhatsApp, with a reminder if nobody acts.

    To Suresh, sales
    Hot lead: Ravi, 2BHK, budget 60–70 lakh, visiting Saturday 11:00. Call now.
  6. Follow-up, without reminders from you

    Ravi gets a reminder of his visit. Leads that said "call me later" are called at the time they asked for. Those who said no are left alone.

Lead Desk

The heart of Stack19, included for every business. Everything your calling team would do, done the same way every time.

Approve a whole list in one go

Upload 400 leads, or set a rule like "call every new Meta lead". You see who will be called, what Vijaya will ask and what it will cost, then approve once.

Leads
412 ready. 23 duplicates merged, 31 on DND get WhatsApp only.
Goal
Book a site visit
Questions
Budget, area, when they plan to buy
Hours
10 am to 7 pm, Monday to Saturday

Tell Vijaya what you need

Type or say it in your language. Vijaya plans the calls and messages, does them, and comes back with the answer.

Ask these 3 suppliers the price of 50 bags of 53-grade cement, delivered to Dharmavaram.

Cheapest is Sri Venkateswara Traders, delivered on Thursday. All three answers are in Tasks.

Talks the way your customers talk

Everyday language with the English words people really use, not textbook sentences. Pick the voice and style for each language.

  • నమస్కారంTelugu
  • வணக்கம்Tamil
  • ನಮಸ್ಕಾರKannada
  • നമസ്കാരംMalayalam
  • नमस्तेHindi
  • HelloEnglish

Your words open every call

Write the opening line yourself, rename the assistant, choose a voice, or use your own voice with recorded consent.

“Namaskaram {customer} garu, nenu Vijaya, {business} nunchi matladutunnanu…”

Fast, while they're still interested

Website, Meta ad and WhatsApp leads are called about a minute after they arrive, within your calling hours. Portal leads such as IndiaMART follow within minutes.

Website form
about 1 minute
Meta ads
about 1 minute
IndiaMART
within minutes
After hours
WhatsApp now, call in the morning

Built deeper for three industries

Every business gets Lead Desk. For these three, Stack19 also runs the work that comes after the call.

  • Sarees and textiles

    For wholesalers and shops

    • Finds retail shops to sell to
    • Saree photos from your catalogue on WhatsApp
    • Store visits booked and reminded
    • New arrivals sent to people who asked
  • Building materials

    For plants, dealers and suppliers

    • Finds builders and contractors near you
    • IndiaMART and JustDial enquiries called first
    • Quotes worked out, sent after you approve
    • Delivery trips and follow-ups
  • Schools

    For schools, colleges and coaching

    • Admission enquiries called the same day
    • Campus visits booked and reminded
    • Fee reminders from your fixed templates
    • Marks sent to parents from your file, never written by the AI

Any other business with leads

Start from a ready playbook and change the questions to suit you.

  • Real estate
  • Coaching
  • Clinics
  • Insurance and loans
  • Auto dealers
  • Interiors and solar
  • Travel
  • Gyms
  • Wholesale

Two ways to start

Prices are announced at launch. Every plan has a 14-day trial that starts when your WhatsApp is connected.

Lead Desk

For businesses that already get leads and need them called and followed up.

Pay as you go, Lead Desk 300 or Lead Desk 1,000

  • AI calls in six languages
  • WhatsApp follow-ups included
  • Every lead source and import
  • Outcomes, follow-ups and reports
  • Tell Vijaya what you need

Price at launch

AI workforce

For businesses that want new customers found, and the work after the call handled too.

Starter, Growth or Business

  • Everything in Lead Desk
  • Lead Finder and Researcher
  • Your industry's tools: catalogue, quotes, visits, fees
  • More people and more businesses
  • Call minutes and messages included

Price at launch

If your minutes run out before the month ends, add more in two taps or upgrade and pay only the difference. Calls wait in a queue until then, so no lead is lost.

  • You decide the rules

    Calling hours, spending limits and one switch that pauses everything.

  • Honest on every call

    Vijaya never pretends to be a person. Ask, and the honest answer is: an AI assistant.

  • DND respected

    DND numbers never get promotional calls. Saying "stop" ends all calls and messages.

  • Your data stays yours

    Download or delete it whenever you like. Consent is recorded, as India's DPDP law asks.

Questions owners ask

Will it sound like a robot?

No. Vijaya speaks everyday Telugu, Tamil, Kannada, Malayalam, Hindi and English and answers what the customer actually says. You choose the voice and style, and you can write the opening line yourself.

How do you find new leads for me?

With an AI workforce plan, the Lead Finder looks for businesses that fit what you sell, such as retail shops for a saree wholesaler or builders near a paver plant. The Researcher checks each one, and you approve the list before anyone is contacted. Schools don't get lead finding.

Do I have to approve every call?

No. Approve a list, or a rule like "call every new website lead", once. Calling hours and spending limits keep it in check.

What if a customer wants to talk to a person?

Vijaya hands the lead to the right person on your team over WhatsApp, with a short summary of the call.

What happens when my minutes run out?

You're told before they run out. Add minutes in two taps, or calls wait in a queue until you do. No lead is lost.

Let Vijaya call your next hundred leads

See it work for a business like yours. We set it up with you, in your language.

Book a demo

We use only the cookies this site needs to work: to keep you signed in, keep it secure, and remember your language and light or dark choice. We use no advertising or tracking cookies.

Read the Privacy notice