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Read the case studyCustom WhatsApp CRM and Shared Team Inbox Development
One WhatsApp number shared by your whole team, with contacts, pipelines, broadcasts and reports in one place.
- Free 30-minute consultation
- Fixed-price proposal before work starts
- NDA on request
- You own the code and accounts
In short
Build with Fasil builds custom WhatsApp CRMs on the official WhatsApp Business Platform: a shared inbox where your whole team works one number, with contact profiles, tags, sales pipelines, chat assignment, approved broadcasts, AI-suggested replies and reports. It can sync with HubSpot, Zoho or your ERP, and there are no per-seat fees.
Written and reviewed by Fasil M, Full Stack & AI DeveloperLast updated - Typical timeline
- 4–8 weeks for a first version
- Pricing
- Fixed price per milestone, after a free consultation
- Ownership
- Code, data and accounts are yours
- Location
- Remote, worldwide, from Kerala, India
When sales and support run on WhatsApp, things get messy fast: staff use personal phones, customer history leaves with the employee, nobody knows who replied to whom, and managers cannot see how many leads came in or were lost.
I build custom WhatsApp CRMs that put every conversation in one shared inbox on your official business number: chats assigned to the right person, contact profiles with full history, deal stages, follow-up reminders, broadcasts to opted-in customers and reports on response times and conversions.
Off-the-shelf tools like WATI, Interakt or AiSensy are a good start. A custom CRM makes sense when you need your own workflow, deep integration with your ERP or store, data in your own servers, or when per-agent pricing gets expensive as the team grows.
What you get
Everything needed to launch, in one build
Shared team inbox
Many agents on one WhatsApp number, with assignment, internal notes, collision alerts and working hours.
Contacts and history
Every customer’s chats, orders, tags and notes in one profile that stays with the business, not the employee.
Sales pipeline
Leads move through stages from new to won, with follow-up reminders and lost-reason tracking.
Broadcasts and segments
Approved template campaigns to tagged, opted-in segments, with delivery and reply tracking.
AI assist and chatbot
AI-suggested replies, chat summaries and an optional bot that handles first-line questions before a person steps in.
Integrations and reports
Sync with HubSpot, Zoho, your ERP or store, track click-to-WhatsApp ads, and see response time and conversion reports.
Want your team on one WhatsApp inbox?
Get a written scope, timeline and fixed price, usually within 24 hours.
How we work together
- 01
Free consultation
A 30-minute call to understand your goals, users and budget. No obligation.
- 02
Fixed-price proposal
A written scope with milestones, timeline and cost, so there are no surprises.
- 03
Build in the open
Weekly demos on a live staging link. You see progress, not just a final reveal.
- 04
Launch and grow
Production launch, monitoring and support as your product and users grow.
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Read the case studyFrequently asked questions
What is a WhatsApp CRM?
A WhatsApp CRM is a customer relationship system built around WhatsApp conversations. It lets a team share one business number, keeps every customer’s chat history and details in one place, and adds sales pipelines, broadcasts and reports on top.
Can several staff use one WhatsApp number at the same time?
Yes. With the WhatsApp Business Platform, any number of agents can work from the same number through the shared inbox, each seeing the chats assigned to them.
Should I build a custom WhatsApp CRM or use WATI or Interakt?
Use an off-the-shelf tool if it fits your process and team size. Build custom when you need your own sales workflow, tight integration with your ERP, store or existing CRM, data on your own servers, or when per-agent fees for a large team cost more than owning the system.
Can it connect to HubSpot, Zoho or our ERP?
Yes. Contacts, deals, orders and invoices can sync both ways, so WhatsApp conversations show up in the tools your team already uses.
Is there a mobile app for the team?
The inbox works in any browser, and a React Native app can be added so field sales staff can reply and update leads from their phones.
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Other solutions
Want your team on one WhatsApp inbox?
Tell me about your SaaS, business app or community app. You will get a free consultation and a fixed-price proposal, usually within 24 hours.
- Free 30-minute consultation
- Fixed-price proposal before work starts
- NDA on request
- You own the code and accounts