One page per product, each written the same way: what it is and who it suits, what running or paying for it involves, a table against wuapi, and how the concepts map if you move. Where self-hosting or another service is the better fit, the page says so. Every page carries the date its facts were checked on the other product's own site.
Baileys speaks WhatsApp's protocol. Here is everything else a production number needs, what it takes to build it around Baileys, and what wuapi runs for you.
Evolution API next to wuapi: what self-hosting it involves, where it is the better choice, a feature table, and how instances and webhooks map across.
Green API next to wuapi: per-instance plans, the free Developer tier, receiving by queue or webhook, proxies, pacing, and how instances map if you move.
Kapso is a developer platform on the official WhatsApp Cloud API. How it compares with wuapi's linked numbers on pricing, templates, groups and webhooks.
Telnyx offers WhatsApp on the official Cloud API. How that compares with wuapi's linked numbers on fees, templates, keeping the app, webhooks and moving over.
Twilio's WhatsApp API runs on the official Cloud API. Here is what that costs and requires, when it is the right call, and when a linked number fits better.
UltraMsg next to wuapi: the per-instance price, send delays, groups, webhook checks and retries, and how instances and settings map if you move.
WAHA next to wuapi: what the free self-hosted API gives you, what running it involves, a feature table, and how sessions and webhooks map across.
Wassenger now runs on the official WhatsApp Business Platform. Here is how it compares with wuapi's linked numbers on price, groups, webhooks and moving over.
Whapi.Cloud next to wuapi: per-channel pricing, proxies, webhook signing, the free tiers compared, and how channels and endpoints map if you move.
whatsapp-web.js drives WhatsApp Web in a real browser. What running it for customers takes, where it is the right tool, and what wuapi runs in its place.
whatsmeow is a solid Go library for the WhatsApp Web protocol. Here is what a customer-facing number needs beyond it, and what wuapi runs so you do not have to.
02/How to read these pages
Other products change their prices and features, so each page names the day we checked them and links the source. Every wuapi figure is read from the same place the billing reads it.
Want the checklist instead of the comparisons? The provider checklist works on any API, self-hosted or not.