Simple answer: No. There are very few cases where you should be using Coexistence.
The biggest issue with WhatsApp Coexistence is that the API and the phone don't always stay perfectly in sync. Since one side is powered by the WhatsApp Business Platform (API) and the other is the WhatsApp Business app, synchronization isn't always reliable.
This can lead to issues like:
Messages appearing on the API but not immediately on the phone (or vice versa).
Media, documents, or voice notes not syncing consistently between both sides.
Chat history looking different depending on whether you're viewing it from the app or the API inbox.
Delays before new messages appear on the other side.
In some cases, actions taken on one side (like reading or replying to a message) may not be reflected immediately on the other.
Coexistence isn't a mirror between the phone and the API. They're connected to the same WhatsApp number, but they're not guaranteed to have a perfectly synchronized view of every conversation at all times. That's why WhatsApp describes coexistence as a convenience feature for gradual migration rather than a fully synchronized multi-client experience.
Some of the other downsides are:
No true single source of truth. Conversations can happen in both the app and the API, making it harder to track who replied and where.
Agents can accidentally duplicate replies. Someone replies from the app while another agent replies from the platform, leading to confusing customer experiences.
Limited feature parity. Not every feature available in the WhatsApp Business App is exposed through the API, and vice versa.
Automation can interfere with manual conversations. Bots, workflows, or auto-replies can trigger while someone is manually chatting from the app unless carefully configured.
Harder to maintain conversation ownership. There's no built-in way to "assign" chats between app users and platform agents.
Reporting becomes messy. Analytics are split between app activity and platform activity, so it's harder to measure response times, agent performance, and automation accurately.
Contact management is inconsistent. Labels, notes, and organizational features in the app may not sync with your CRM or API platform.
Risk of human error. Staff using the app may send messages that bypass templates, workflows, approval processes, or CRM logging.
Some API features are unavailable from the app. Things like advanced automation, CRM integrations, webhooks, custom routing, and AI assistants only work through the platform.
Some app features don't reflect in the platform. Certain app-specific actions or metadata may not be visible to API users.
Notifications can be overwhelming. The phone still receives app notifications while agents are working from the platform.
Scaling is poor. As your support team grows, relying on a phone app alongside an API platform becomes increasingly difficult to manage.
Device dependency. Someone with access to the phone can still intervene in conversations, making governance and auditing harder.
Permissions are limited. The app doesn't provide granular role-based access like most customer support platforms.
Depending on the BSP and synchronization timing, there can be short delays or differences in how chats are displayed.
Even with the best of BSPs, the delays can't be calculated or predicted.
Training becomes more complicated. Teams have to learn two interfaces and understand which actions should happen in which one.
When coexistence is actually useful
Despite these drawbacks, coexistence is valuable for businesses that:
Are migrating gradually from the app to the API.
Still need the phone for occasional manual conversations.
Have very small teams that don't require strict workflows.
Want to keep existing app functionality while adopting automation.
When it's usually a bad fit
Coexistence tends to become a pain point when you:
Have multiple support agents.
Need reliable analytics and reporting.
Depend heavily on automation.
Require CRM integration.
Want strict conversation ownership and audit trails.
Handle a high volume of customer conversations.
In practice, many businesses treat coexistence as a temporary transition state rather than a permanent setup. Once support volume grows, operating entirely through the API and a shared inbox generally provides a more consistent and scalable workflow.