Business with WhatsApp: Inbox, API and Workflows
Learn how to run WhatsApp for business with a shared inbox, official API, team workflows, pricing guidance and Singapore compliance tips.
A practical guide that connects the app-versus-Platform decision to team workflows, current pricing rules and Singapore compliance requirements.
A business using WhatsApp can start with the WhatsApp Business app for basic customer conversations, or use the WhatsApp Business Platform when a team needs shared operational control, connected integrations, automation or higher-volume messaging. The choice depends on team size, messaging volume and workflow complexity, including whether WhatsApp needs to connect with other systems.
This guide compares the app with Platform. It covers shared inboxes and team workflows, API access, current pricing rules, and the Singapore consent, Do Not Call and opt-out checks that apply to WhatsApp marketing.
Business with WhatsApp starts with choosing the right product
Choose based on your team size, messaging volume and need for connected systems. The WhatsApp Business app suits a small team starting out. The WhatsApp Business Platform suits a business that needs shared operational control, integrations, automation or higher-volume messaging.
WhatsApp Business app: a practical starting point
The WhatsApp Business app is free to download. It includes business profiles, greeting messages, away messages, quick replies, labels, catalogs and carts. A small business can manage customer conversations from the app and use these tools to organise routine enquiries. Meta describes the app as having limited customisation and integrations, so it may become restrictive as more staff, channels or processes are added.
WhatsApp Business Platform: the official API path
The WhatsApp Business Platform is Meta’s programmatic messaging product for medium and large businesses. It supports API-based messaging, interactive messages, automation, CRM and marketing-automation integrations, customer-care routing and conversational flows.
The Platform is a better fit when a business with WhatsApp needs conversations connected to its wider operations. An integration layer such as Mobitech can bring WhatsApp alongside other customer channels and connect conversations to CRM, ticketing and automation. The Platform is the API path; the team interface and workflow depend on the direct build or partner chosen.
Can multiple staff members use one WhatsApp business number?
Yes. The WhatsApp Business app supports up to four linked devices on one number, so multiple staff members can view and respond to customer messages from their own devices. Meta also says businesses can assign users, use multi-device support and add notes to customer profiles. For teams handling several channels, Meta Business Suite Inbox brings Messenger and Instagram together with WhatsApp in one place.
What the WhatsApp Business app can support
This setup can suit a small team with a manageable enquiry volume. Staff can share access to the same number, add customer notes and continue conversations across linked devices. The limit is operational control: app-level access does not create structured routing, ownership, escalation or connected records by itself.
When a shared inbox needs more structure
A growing team may need each enquiry assigned to an owner, routed by intent and recorded after resolution. Meta’s WhatsApp Business Platform documentation describes API access, webhooks, CRM integrations, smart routing and automated conversational flows as building blocks for this model.
The Platform does not automatically include a complete shared inbox, CRM, ticketing system or analytics dashboard. A business must connect a direct build or choose a partner that provides the interface and workflow layer. That is where an API-connected workspace can give teams clearer ownership and customer context.
What a WhatsApp team workflow should look like
A practical workflow for a business with WhatsApp should move each enquiry from capture to a named owner, through resolution and follow-up. Treat this as an operating recommendation, not a process prescribed by Meta.
Capture and qualify the enquiry
Start by capturing the message, identifying the customer and recording their intent. Ask only for the information needed to decide what happens next. Then assign or route the conversation to an owner, such as sales or support at a specific outlet.
The assigned person can reply with approved content or automation. If the request needs judgement, sensitive handling or a different team, the workflow should escalate it. Meta requires automated responses during the 24-hour customer service window to provide a clear path to help, such as a human-agent transfer, phone, email, web support or an in-store visit.
Assign, resolve and record the conversation
After resolution, record the outcome in CRM or ticketing and schedule any follow-up. The WhatsApp Business Platform supports routing, automation, CRM integration and human escalation, while the interface and operating controls depend on the setup or partner used.
An omnichannel workspace such as Mobitech can keep context when a conversation moves between WhatsApp, social media, email and website chat. That workspace connects these channels; the WhatsApp Platform itself does not supply every channel.
How to access the WhatsApp Business Platform API
Direct access or a Business Solution Provider?
Businesses can access the WhatsApp Business Platform directly or work with an approved Business Solution Provider. Direct access suits teams that can call APIs and connect the Platform to their own systems through webhooks. A partner can provide the integration layer and an operational interface, reducing the amount of infrastructure the business must build itself.
Phone number and account requirements
Onboarding includes setting up a WhatsApp Business Account, creating a business profile, verifying the phone number and completing business verification. The Platform requires a dedicated number that can receive an SMS or voice call for verification. It must use international format; short codes are generally not supported, and whether a toll-free number is eligible or the number must be removed from an existing WhatsApp account depends on the onboarding route and setup.
Starting and scaling messaging access
New Platform accounts begin with messaging limits. Meta describes access in terms of business-initiated conversations with unique users in a rolling period, and access can scale from 1,000 to 10,000 to 100,000 such conversations and eventually become unlimited, provided the business maintains high-quality interactions. The initial test-and-learn stage allows messages to up to 1,000 unique customers in a rolling 24-hour period. These limits make gradual monitoring part of the setup, whether the business uses direct access or a partner.
Message rules and WhatsApp Business Platform pricing
A business may contact someone on WhatsApp only if it has their mobile number and opt-in permission for subsequent WhatsApp messages or calls. It must also honour any request to block or discontinue messages, or to opt out.
The 24-hour customer service window
When a user messages the business, non-template replies are allowed during the 24-hour customer service window. The window resets each time the user sends another message. After it closes, the business must use an approved Message Template.
When templates are required
On the WhatsApp Business Platform, business-initiated conversations require an approved Message Template. Templates may be text-based, media-based or interactive. They are intended for opted-in notifications such as reminders or promotions. A workflow should therefore separate customer-initiated service replies from outbound notifications.
What pricing depends on
Meta’s current pricing page says businesses are charged per delivered message, with rates based on the recipient market and message category. The four categories are marketing, utility, authentication and service. Meta currently says service messages and utility messages sent in response to users are not charged. Messages sent for 72 hours after a customer arrives through an ad that clicks to WhatsApp or a Facebook Page call-to-action button are also not charged.
Do not publish an exact Singapore rate without checking Meta’s live rate card or calculator. Meta’s FAQ still contains older per-conversation and first-1,000-conversations-free wording; the current pricing page describes per-message pricing, so use that source instead.
Singapore compliance checks before sending WhatsApp marketing
Consent
Get clear, unambiguous permission before sending marketing messages on WhatsApp. Meta requires businesses to have the person’s mobile number and opt-in permission for subsequent WhatsApp messages or calls. Singapore’s PDPA requirements apply alongside Meta’s rules, so meeting one does not replace the other.
DNC and opt-out handling
The PDPA’s Do Not Call provisions generally prohibit marketing messages to Singapore telephone numbers listed on the DNC Registry. This covers messages promoting goods, services or business opportunities, including messages sent by your organisation or by another organisation acting on your behalf. PDPC guidance recognises that messages sent through applications such as WhatsApp can fall within this framework.
You do not need to check the DNC Registry where the recipient has given clear and unambiguous consent to receive the marketing message. Covered messages must include an opt-out method using the same medium. After receiving an opt-out request, suppress further marketing messages immediately and, where applicable, comply with any statutory outer deadline, including 21 days. The DNC provisions do not cover marketing messages sent to businesses rather than individuals, but check that a contact is genuinely B2B rather than a personal number.
Extra care for clinics and regulated businesses
Do not assume WhatsApp is suitable for every type of sensitive information. Meta’s policy restricts telemedicine or health-related information where applicable regulations prohibit using systems without heightened requirements. Clinics should confirm that each proposed use meets the relevant regulatory requirements before requesting or sending such information.
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How to choose a WhatsApp setup for your business
The app may be enough when
Start with the app when a small team needs a business profile, quick replies, labels, catalogs and access from linked devices. The WhatsApp Business app supports up to four linked devices on one number, making it a practical starting point for basic conversations and customer information.
The app becomes harder to manage as enquiries need clear ownership, follow-up or handoffs across teams or outlets.
Choose an API-connected workflow when
An API-connected setup fits when the business needs structured routing, multiple teams or outlets, CRM and ticketing connections, automation, human escalation or higher-volume messaging. The WhatsApp Business Platform is an API and integration layer. Direct access requires the business to connect or build the staff interface, routing logic and internal workflow; a partner may provide those pieces.
Choose based on customer volume, number of agents, conversation ownership, how follow-up is recorded, required integrations, consent processes and whether advertising sources need connecting to conversations.
Mobitech can unify WhatsApp with social media, email and website chat, then connect conversations to CRM, ticketing and automation in one workspace. Learn more about Mobitech’s omnichannel customer engagement platform.
Frequently asked questions
What is the difference between the WhatsApp Business app and the WhatsApp Business Platform?
The app provides basic tools for managing a business profile and customer chats. It also supports quick replies, labels and catalogs. The Platform is an API and integration layer for automation, routing, CRM connections and higher-volume messaging.
Can multiple staff members use one WhatsApp business number?
Yes. The WhatsApp Business app supports up to four linked devices on one number. This does not by itself provide structured ownership, escalation or CRM records.
When is a shared inbox enough, and when does a business need an API-connected inbox?
A shared inbox may be enough for a small team with manageable enquiries. An API-connected inbox is more suitable when the business needs routing, ownership, automation, CRM or ticketing connections, multiple outlets or higher-volume messaging.
Does the WhatsApp Business Platform include its own team inbox?
No. The Platform provides the API and messaging capabilities; the team inbox and workflow depend on the direct build or partner chosen.
What is the 24-hour WhatsApp customer service window?
It is the period after a user messages the business when non-template replies are allowed. The window resets whenever the user sends another message.
When are WhatsApp Message Templates required?
Business-initiated conversations require an approved Message Template after the 24-hour customer service window closes.
How should a business assign, escalate and follow up on WhatsApp enquiries?
Capture and qualify the enquiry, assign it to an owner, escalate requests needing judgement or specialist handling, record the outcome and schedule follow-up where needed.
What does WhatsApp Business Platform pricing depend on in Singapore?
Meta’s current pricing depends on delivered message, recipient market and message category: marketing, utility, authentication or service. Check Meta’s live rate card or calculator for the current Singapore rate.
What consent, opt-out and DNC checks apply to WhatsApp marketing in Singapore?
Obtain clear, unambiguous permission, check whether the Singapore number is covered by the DNC provisions, provide an opt-out method using the same medium and stop marketing messages within 21 days of an opt-out request.
How can a business connect WhatsApp conversations to CRM, ticketing and advertising sources?
Use the WhatsApp Business Platform with a direct integration or partner-provided workspace that connects conversations to CRM, ticketing, automation and advertising sources. The Platform itself does not supply every workflow or channel.
The practical decision is to start with the app when basic shared access is sufficient, then move to an API-connected workflow when the team needs reliable routing, follow-up, compliance controls and connected customer context across channels.
