Unofficial WhatsApp API comparison
ZapZap API vs Baileys: open source library or managed API?
Comparing Baileys with an API means comparing different kinds of things. Baileys is an open source TypeScript library that talks to WhatsApp Web over a WebSocket. It is not a server or a product: you program on top of it. ZapZap API is the ready-made service, with managed instances, a dashboard and HTTP endpoints. The facts about Baileys come from the official repository (WhiskeySockets/Baileys on GitHub), checked on 2026-10-26. For developers who want full control, Baileys may be exactly what you are looking for.
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Side by side
ZapZap vs Baileys
| Criterion | ZapZap | Baileys |
|---|---|---|
| What it is | A managed WhatsApp API service, with a dashboard and HTTP endpoints | A TypeScript library that connects to WhatsApp Web over WebSocket; it is not a server |
| License and software cost | R$15 per active number/month, prepaid, no per-message fee | MIT, free; server and development costs are on you |
| What you have to build | Almost nothing: create the instance, pair by QR code and call the API | HTTP server, session persistence, reconnection, queue, webhooks and a dashboard, if you want them |
| Upkeep | With ZapZap: updates and service stability | With you: following versions such as 7.0.0, which brings changes incompatible with the previous one |
| Project stance on misuse | Unofficial solution; sending best practices and warm-up recommended | The repository says it is not affiliated with WhatsApp and that maintainers do not condone use that violates the Terms of Service, such as spam and bulk messaging |
| Number ban risk | It exists and is lowered, not removed, by warm-up and good sending behavior | It exists: this is an unofficial implementation of the protocol, and how the number behaves is up to whoever programs it |
| Support | In Portuguese, from the product team | Repository, documentation and community; paid support offered by the maintainer |
Where ZapZap does better
- Ready to use: HTTP endpoints, webhooks and a dashboard already exist, you do not write the session, reconnection or queue layer
- No library upkeep: Baileys 7.0.0 brought breaking changes, and anyone using the library directly has to follow and migrate. On ZapZap that is our job
- AI per instance, Flow Builder, Funnel, Marketer and group management included, with no extra development
- Predictable price: R$15 per active number per month, prepaid, no per-message fee, with support in Portuguese
- Quick start: a welcome credit when you verify your phone, with no deposit, one per phone and subject to the current campaign
Where Baileys makes sense
- MIT license: open source, no software cost and no subscription, free to use and adapt
- Maximum control: as a library, you decide how to store sessions, handle events, queue sends and expose your own API
- Direct WebSocket connection, no browser, which usually uses fewer resources than solutions that drive a browser
- The base of several other tools: the Evolution API repository, for example, lists Baileys as one of its connections, so the community and examples are broad
- Great for engineering teams that want to build their own product on WhatsApp Web
Choose ZapZap if
Choose ZapZap API if your goal is to use WhatsApp in your business, not to build WhatsApp infrastructure. You get endpoints, a dashboard, AI, funnels and automations ready to go, predictable cost per number and support in Portuguese, and your team's time goes into the product that actually sells.
Prefer Baileys if
Baileys is the better choice when you have an engineering team and want to build something of your own: a product, an internal service or an experiment that needs fine control over the connection. It also makes sense when the budget is only development hours and you accept keeping the library up to date and answering for how the number behaves.
Frequently asked questions
Is Baileys an API or a library?
A library. The official repository describes it as a WebSocket-based API for WhatsApp Web, in TypeScript. To get HTTP endpoints, a dashboard and webhooks, you must build that layer or use a tool that offers it, such as Evolution API, WAHA (in one of its engines) or ZapZap.
Is Baileys free?
Yes, the license is MIT and there is no subscription for the software. The cost is in the development, hosting and upkeep you take on.
Is Baileys official WhatsApp software?
No. The repository states the project is not affiliated, associated, authorized or endorsed by WhatsApp, and that maintainers do not condone use that violates the Terms of Service. WhatsApp's own Terms prohibit bulk and automated messaging. ZapZap is also an unofficial solution, so ban risk exists on both.
Is it better to build on Baileys or use ZapZap?
It depends on what your time is worth and what you sell. If WhatsApp is the product, building can make sense. If WhatsApp is a means to serve, sell or collect, a ready-made API usually costs less than sessions, queues, reconnection and a dashboard built and maintained by you.
Where do the Baileys facts on this page come from?
From the official repository github.com/WhiskeySockets/Baileys (README and license) and WhatsApp's Terms of Service, checked on 2026-10-26. Confirm on the repository before you decide, since the project moves fast.
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.