EasyCoexistence vs Baileys
Baileys is an open-source library that connects to WhatsApp by implementing the linked-device protocol directly. It works, it is free or cheap, and it carries a risk the official route does not: a number reached this way is in breach of WhatsApp's terms and can be banned without warning. EasyCoexistence connects the same number through Meta's own Coexistence feature.
How each one reaches WhatsApp
The whole comparison is here, and everything else follows from it.
Baileys: A TypeScript library implementing WhatsApp's linked-device protocol over a websocket. It logs in the way the web client does, by scanning a QR code, and then holds the session itself. No Meta approval is involved because Meta is not asked.
EasyCoexistence: Meta's Cloud API, with credentials Meta issued to the client's own WhatsApp Business Account, through Coexistence. The number is registered with Meta as an API number and the WhatsApp Business app carries on working on the phone at the same time.
What happens when it goes wrong
Both break sometimes. What differs is whether there is anyone to ask.
Baileys: A community project on GitHub. When WhatsApp changes the protocol the library has to catch up, and your integration is down until it does. There is no support contract and no ban appeal.
EasyCoexistence: A connection on Meta's own infrastructure, monitored continuously. When it drops we read Meta's own disconnection reason, so fourteen days of inactivity is distinguishable from a real removal, and you are told before a customer notices.
What it costs, honestly
The unofficial route usually looks free, and the comparison is not really about the licence fee.
Baileys: Free as a library, plus a server to run it on, a session to keep alive and an engineer who understands it. The cost is maintenance and risk rather than licence.
EasyCoexistence: From US$ 9 per connected number per month, hosting, monitoring and the MCP connector included. There is no server to run, no session to re-link and nothing to rebuild when the protocol changes.
What each one can actually do
The honest part, and the reason the unofficial projects exist at all.
Baileys: More than the official API in some ways: group chats, personal conversations, presence and read receipts at the protocol level. That reach is the reason it exists.
EasyCoexistence: Everything the Cloud API permits: send and receive messages, templates, media and interactive messages, with webhooks delivered by Meta. Group chats are outside the API and free-form replies need the 24 hour window open. Those are Meta's rules, and they apply to every official provider.
Who should choose which
There is a real case for each, and it depends entirely on what the number is worth.
Keep reading
- EasyCoexistence vs WPPConnectWPPConnect automates WhatsApp Web in a browser session, against WhatsApp's terms. EasyCoexistence uses Meta's official Cloud API through Coexistence.
- EasyCoexistence vs Evolution APIEvolution API wraps unofficial WhatsApp libraries behind a REST interface. EasyCoexistence uses Meta's official Cloud API, so the number cannot be banned.
- Unofficial WhatsApp APIs: what actually gets numbers bannedUnofficial WhatsApp gateways sign in as a linked device, which breaks Meta's terms. What that costs, and what the official route looks like instead.
- The best WhatsApp MCP serversWhatsApp MCP servers compared. Most open-source ones drive an unofficial bridge that risks a ban. EasyCoexistence runs on Meta's official Cloud API.
- WhatsApp Coexistence: the app and the API on one numberCoexistence runs the WhatsApp Business app and the Cloud API on the same number at once. What it changes, what it does not, and how a number gets connected.
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