WhatsApp multi-agent: how several agents handle the same number
How to have 2, 3 or 4 agents handling the same WhatsApp number at the same time — without confusion, without losing history, without official API.
WhatsApp became the front door of customer service. But the native app is single-user: one number per device, one person handling at a time. For companies receiving dozens or hundreds of chats per day, that's a bottleneck. Multi-agent solves it — several agents on the same number, simultaneously, with unified history.
What is WhatsApp multi-agent
Multi-agent is the ability for 2+ people to handle the same WhatsApp number simultaneously, each on their own screen, without fighting over a phone. Every conversation is logged on the number's history and any agent can see what was discussed before.
3 ways to do multi-agent
| Approach | How it works | When it fits |
|---|---|---|
| Native WhatsApp Web | Same number on up to 4 browsers | Small team, no routing control |
| Official API + BSP | Web panel with queue | 10k+ chats/month, big budget |
| Extension with CRM (Zapext) | Multi-agent panel on top of WhatsApp Web | 2-4 agents, no per-message cost, 5-minute setup |
Why bare WhatsApp Web isn't enough
Yes, WhatsApp Web allows connecting the same number on up to 4 devices. But:
- No way to route a chat to the right agent.
- Two agents can answer the same chat at the same time (customer gets two replies).
- No availability control.
- No 1-click chat transfer.
- No per-agent reporting.
Professional multi-agent with Zapext
The Zapext Plus plan allows up to 4 simultaneous agents on the same WhatsApp Web number, with:
- Automatic distribution — new chat goes to available agent.
- 1-click transfer — "hand this to Sarah".
- Unified history — any agent sees prior context.
- Internal notes — agent leaves context for the next.
- Agent status — online, away, on break.
- Per-agent report — productivity, response time, conversion.
How to set up multi-agent in 4 steps
1. Connect the number. Install Zapext on the main computer's Chrome. Scan the QR Code once.
2. Add agents. In the panel, create secondary users (up to 3 more on Plus).
3. Define routing rules. Round-robin or by tag (specialized agent).
4. Configure hours and status. Each agent signs in/out. Off hours, chatbot covers.
Security guidelines
- Each agent uses their own login — never share passwords.
- Company computers only.
- End session when shift is over.
- The number owner always has admin access via the phone.
When multi-agent isn't enough
Above 4 simultaneous agents or 10k+ conversations/month, the official API via BSP makes sense. For 95% of SMBs, extension-based multi-agent solves it.
See also: WhatsApp CRM, chatbot for lead qualification.
Frequently asked questions
How many agents can use the same number?
With bare WhatsApp Web: up to 4 devices, no control. With Zapext Plus: up to 4 simultaneous agents with routing, transfer, and reporting.
Does the customer see which agent they're talking to?
No. The customer always sees only the company's number. Agents are invisible to the customer — internally each chat has an owner.
If an agent leaves, does the history stay?
Yes. History is tied to the number, not the agent. Whoever takes over sees all previous conversations.
Do I need the official API for multi-agent?
No. For up to 4 simultaneous agents, the Zapext extension on top of WhatsApp Web delivers the same result, without per-message cost or template approvals.
Does it work with regular WhatsApp or only Business?
Works with any number connected to WhatsApp Web — regular or Business.