Whatsapp sending Services

Do any of you guys know how those WhatsApp sending services manage to send messages?
Are they just renting a server and somehow send those messages from their server to phone numbers?

They were managed by the Servers of whatsap and ngix encypted

i'm also interested

As far as I know there is 3 or 4 different ways to manage it.

1) Using whatsapp api
2) With emulator
3) Integrate with whatsapp web
4) Desktop platform

Method 1, 2 and 3 usually are web based. You definetely need a server tu running it. That server function is to create a channel and as a sender.

Most channels created are using nokia user agent (Whatsapp support this user agent till end of this year). I still can't found a way to create a channel using android user agent.

The main problem in bulk sending is to create a channel which can send bulk messages. If today you find a loophole after sent 50k-70k messages Whatsapp will fix the trick. So you need to find another loophole.

joining this thread. Interested.

looking to find this out as well