WhatsApp library and API comparison
ZapZap vs whatsmeow: Go library or ready-made API
whatsmeow is a Go library for the WhatsApp Web multidevice API. It is the foundation for anyone who wants to build their own server. ZapZap already delivers the server, with REST and webhooks. Both are unofficial.
Updated on
Side by side
ZapZap vs whatsmeow
| Criterion | ZapZap | whatsmeow |
|---|---|---|
| What it is | Managed REST API, with a panel, webhooks and ready-made modules | Go library for the WhatsApp Web multidevice API (README, 10/29/2026) |
| License and software cost | R$15 per active number per month, prepaid, no per-message fee | MPL-2.0, no subscription. You pay for your infrastructure and the development |
| Language | Any language that can make an HTTP request | Go |
| REST server and webhooks | Included | The README page does not mention a REST server or webhooks: the library is a component, and the server is yours to build |
| Listed limitations | See the docs for each feature | The README lists broadcast lists and calls as not implemented |
| Warning about ban risk | The risk exists: it is unofficial and goes against WhatsApp's terms. Warm-up and delays reduce the risk, they do not remove it | The README page carries no warning about unofficial use or bans. That does not mean the risk is absent |
| Upkeep | The platform follows WhatsApp's changes | It is yours: follow the library updates and run the service |
Where ZapZap does better
- No Go and no server to write: it is a ready REST API, usable from any language
- Panel, webhooks, AI per instance and group modules already included
- Community warm-up and delay between messages built in (they reduce the risk, they do not remove it)
- Support in Portuguese and payment in reais
Where whatsmeow makes sense
- A Go library under the MPL-2.0 license, according to the README
- A library focused on the WhatsApp Web multidevice API, in Go, to embed in your own service
- Full control of the code and the hosting, with no software subscription
- Usage docs on pkg.go.dev and community support channels (Matrix and GitHub Discussions)
Choose ZapZap if
Choose ZapZap if you do not want to build and run a WhatsApp server, need a REST API with webhooks now and want to plug into n8n, a CRM or your own system without writing Go. Accept the risk of an unofficial solution.
Prefer whatsmeow if
Choose whatsmeow if your team writes Go, wants to embed WhatsApp in its own service, needs full control over the code and the hosting and accepts maintaining everything. If you require an official channel, neither fits: use Meta's official API.
Frequently asked questions
Is whatsmeow a REST API?
The README page describes it as a Go library and does not mention a REST server (read on 10/29/2026). Anyone who wants REST has to build that server or use a project that offers one.
Does using whatsmeow avoid bans?
No. The README carries no warning, but that does not make the use allowed: it is also an unofficial way to access WhatsApp, and the number can be limited or banned. ZapZap has the same kind of risk.
Which one is cheaper?
The library has no subscription, but the cost is development time and running the server. ZapZap costs R$15 per active number per month and comes ready.
Can I start with ZapZap and build my own server later?
Yes. ZapZap is a quick way to validate the use case. If volume or the need for control justifies it, you move to your own solution.
Start now
Create your account, connect a number in minutes and test the API with warm-up and anti-ban. R$15 per active number/month, prepaid, no lock-in.