How to Reply to WhatsApp and Instagram in One Place
How to Reply to WhatsApp and Instagram in One Place
You can manage WhatsApp and Instagram messages from a single shared inbox without switching apps. The inbox pulls both channels together, lets you assign chats to staff, and lets an AI handle the common questions so you focus on the ones that need a real person.
Here is how it works and how to set it up.
Why do messages end up scattered across apps in the first place?
WhatsApp and Instagram are separate platforms with separate notification systems. By default, each one lives in its own app, on its own phone or account. A customer who messages you on Instagram and then follows up on WhatsApp creates two separate threads that look completely unrelated, even though it is the same person asking the same thing.
For a solo owner or a small team, that means constantly context-switching. You check your personal Instagram DMs, then switch to the WhatsApp Business app, then maybe check your email. Small business owners already lose an average of 96 minutes of productivity daily to wasted time and inefficiencies. Adding app-juggling on top of that compounds the problem.
The channel split also creates response-time problems. 79% of consumers expect businesses to respond to social media messages and DMs within the first hour. When messages are buried in separate inboxes across multiple devices, that window closes fast.
In Malaysia, this matters more than most places. 90.7% of Malaysian internet users use WhatsApp monthly, and Instagram has 16.1 million users in Malaysia, representing 44.6% of the total population. Both channels are active. Customers use both. Businesses that only monitor one channel are already missing messages.
What is a shared inbox and how does it connect WhatsApp and Instagram?
A shared inbox is a single dashboard that aggregates messages from multiple channels into one view. Instead of opening WhatsApp, then Instagram, then email, you open one tool and see everything.
For WhatsApp, the connection goes through the official WhatsApp Business API. This is different from the regular WhatsApp app or the free WhatsApp Business app. The API allows multiple users to send and receive from the same number, which the personal apps do not.
For Instagram, the connection uses Instagram’s messaging API, which lets a third-party tool read and send DMs on your behalf after you grant it permission.
Polaris connects both, along with Telegram, email, and a website widget, into one inbox. Businesses with fully integrated omnichannel support achieve 67% customer satisfaction scores, compared to 28% for disconnected multi-channel setups. That gap comes from customers not having to repeat themselves and from businesses actually seeing every message.
How do you set up a connected WhatsApp and Instagram inbox?
The setup has four main parts: connecting WhatsApp, connecting Instagram, inviting your team, and turning on AI replies.
Step 1: Connect your WhatsApp Business number
You will need a phone number that is not already active on the regular WhatsApp or WhatsApp Business app. If your current number is on a personal WhatsApp, you may need to migrate it or use a separate number for the API.
In Polaris, go to Settings, then Channels, and follow the WhatsApp setup flow. It walks you through the Meta verification steps, which include confirming your business name and agreeing to WhatsApp’s Business Policy. This usually takes a day or two if your Facebook Business Manager account is already verified.
Once connected, all incoming messages to that number appear in your Polaris inbox. Replies you send from Polaris go out as that WhatsApp number.
Step 2: Connect your Instagram account
Your Instagram account needs to be a Professional Account (either Business or Creator) linked to a Facebook Page. If it is a personal account, convert it first in the Instagram app under Account Type.
In Polaris, go to Channels again and add Instagram. Log in with your Facebook credentials and grant the permissions it requests. After that, DMs sent to your Instagram profile appear in the same Polaris inbox alongside your WhatsApp messages.
Step 3: Assign conversations to team members
One inbox does not mean one person handles everything. The point is that anyone on the team can see all conversations and pick up where someone else left off.
In Polaris, you can assign a conversation to a specific agent by opening the chat and selecting their name. You can also set up auto-assignment rules: for example, all WhatsApp inquiries go to your sales person, all Instagram DMs go to your social media person, or all Telegram messages go to a general queue.
If you have one person handling everything, you still get the benefit of seeing WhatsApp and Instagram together in one view without switching apps.
For businesses with more than one staff member sharing a number, read how multiple staff can reply from one WhatsApp number for a deeper breakdown of how assignment and handover works.
Step 4: Set up AI auto-replies
The AI in Polaris answers customer questions based on a knowledge base you build. You add information about your business, products, services, pricing, location, and frequently asked questions, and the AI uses that to answer.
This is not a simple keyword trigger system. It searches the knowledge base and generates a real answer. RAG-powered chatbots improve accuracy from 41% for an ungrounded AI to 89-95% when grounded in your own documents, because the AI can only answer from what you have given it.
To set it up in Polaris:
- Go to the AI Agent section in the portal.
- Write a short persona description for the bot, including your business name and what you do.
- Add your knowledge base content. This can be your services, price list, operating hours, location, booking process, and anything else customers ask about regularly.
- Turn the agent on. It will start answering new conversations immediately.
You can configure the AI to hand off to a human for anything outside the knowledge base, or for keywords like “speak to someone” or “call me”. When it hands off, the conversation stays in the inbox for your team to pick up.
What can the AI actually handle?
Being honest about this saves frustration later.
The AI is good at answering questions from your knowledge base: pricing, services, hours, location, booking steps, product details. It can also capture lead details if a customer wants to be contacted, and it can send a booking link or form.
It does not process payments inside the chat. It does not check live inventory or pull order status from an external system. It does not make calls or send documents unless that document is already in the knowledge base.
For a salon owner in Subang, the AI handles “what services do you offer”, “how much is a full set”, “are you open on Sunday”, and “can I book for Saturday at 2pm”. The owner handles “I want to negotiate the price” and “I have a complaint about my last visit”.
That split covers the majority of incoming messages for most small businesses. RAG-powered chatbots can deflect up to 50% of routine support volume from human agents, and the messages that do reach your team are the ones that actually need a human.
Does having more channels mean more work?
Not if they are all in one inbox. The work of replying does not change. What changes is that you stop missing messages that arrive on a channel you did not check.
78% of Malaysians message a business at least once per week. A large chunk of those messages arrive outside business hours. 28% of business contacts arrive after standard business hours. With the AI running, those after-hours messages get an immediate answer rather than sitting until the next morning.
Adding Telegram or email later follows the same process: go to Channels, connect the account, and the messages appear in the same inbox your team already uses. For more on how this works across all channels, see the deeper guide on building an omnichannel inbox for WhatsApp, Instagram, and Telegram.
A practical example
Aishah runs a bridal studio in Shah Alam. Before the shared inbox, she checked WhatsApp on one phone and Instagram DMs on her laptop. Messages arrived on both, but she often replied to WhatsApp faster because it was closer at hand. Instagram inquiries sometimes waited two or three days.
After connecting both channels to Polaris, every message comes into the same screen. Her assistant handles the first responses during the day. The AI answers after-hours questions about packages and availability. If a customer asks for a custom quote, the AI flags it and the conversation is assigned to Aishah to reply personally the next morning.
She did not hire anyone new. The same two people cover more channels with fewer missed messages, because they are not switching between apps to check.
What about customers who message on both WhatsApp and Instagram?
The shared inbox does not automatically merge a WhatsApp conversation and an Instagram DM from the same customer into one thread. They appear as two separate conversations, because they come through two separate platforms.
What you can do is check the customer’s name or phone number before replying, to see if you already have context from another channel. Polaris shows you the conversation history within each channel, so if a customer messaged on WhatsApp three weeks ago, you will see that when they message on WhatsApp again.
This is worth explaining to customers who prefer one channel: if they always use WhatsApp, ask them to stick to WhatsApp. Consistency on their end means a cleaner history on yours.
Connecting WhatsApp and Instagram into one inbox is a practical change for any small business that gets messages on both channels. It does not require a developer. It does not change your phone number. It takes a few hours to set up and starts working the same day.
Try Polaris today and see all your messages in one place. Or request a demo if you want to see how the inbox and AI auto-replies work before setting it up yourself.