WhatsApp Business API Integration
Move customer conversations off personal phones and into your systems.
A shared WhatsApp inbox on one customer record, with follow-up automation, COD confirmation and optional AI agents in Hindi and English.
- Shared team inbox
- Journey automation
- Hindi and English
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What is WhatsApp Business API integration?
WhatsApp Business API integration connects your WhatsApp number to your CRM, helpdesk and order systems so teams share one inbox, messages attach to the customer record and follow-ups run automatically. Stack18 delivers it through Customer OS and Commerce OS, with optional AI agents answering in Hindi and English.
You need this when…
Tap the ones that apply to you.
WhatsApp Business API Integration, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Shared team inbox
One number, many agents.
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CRM link
Every message on the customer profile.
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Automation
Follow-ups that run themselves.
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Commerce flows
Orders on WhatsApp.
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AI replies
Bilingual agent with handover.
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Compliance and reporting
Control the channel.
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A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discover
Map the current process, data and priorities.
Design
Agree modules, integrations and rules.
Build
Configure and extend in weekly demos.
Launch
Data migration, training and go-live support.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Discovery Sprint
Teams deciding what to build first.
- Duration
- 1–4 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Customer OS Launch
Teams that want to go live fast.
- Duration
- 3–4 weeks
- Pricing
- From ₹1.6L, one-time
- 5 modules
- WhatsApp inbox
- Training
Custom WhatsApp integration
Needs that a ready-made system does not cover.
- Duration
- 4–16 weeks
- Pricing
- Fixed price per phase
- Weekly working demos
- Senior team accountable
- 30 days hypercare
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
D2C brand
- Challenge
- COD orders confirmed manually.
- What we do
- WhatsApp confirmation and NDR follow-up.
3–4 weeks
Real estate developer
- Challenge
- Enquiries sit on sales phones.
- What we do
- Shared inbox with auto-assignment.
3–4 weeks
Ethnic wear D2C, Jaipur
- Challenge
- A ₹100+ crore brand needed website, app and back office to share one catalogue and one record of stock and orders.
- What we do
- Nine specialists built website, mobile app and ERP on one connected foundation in two-week sprints.
3 months
Read the case study →Free WhatsApp workflow review
Tell us how your team uses WhatsApp today. We outline the shared-inbox and automation setup.
- Workflow map
- Automation list
- Timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
WhatsApp Business API Integration questions.
Do you provide the WhatsApp API?
We implement and integrate it with your systems; messaging is via official WhatsApp Business channels.
Can several agents share a number?
Yes, through a shared team inbox.
Does it work with our CRM?
Yes, Customer OS includes one, or we integrate yours.
Hindi support?
Yes, Hindi and English.
Cost?
Customer OS from ₹1.6L one-time, excluding GST.
Timeline?
Launch edition in 3–4 weeks.
Let's scope your WhatsApp Business API Integration project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request