A: Hi Oktay, good question, and the honest answer is that it depends on the channel, because the limits are set by WhatsApp and the carriers, not by us. You can load 10,000 or 50,000 contacts into a single Broadcast, but by design it does not go out in one blast: any list over 50 contacts is automatically sent in batches. After the first batch we wait about three hours and after every batch after that about an hour, and we check the reply rate before starting the next one. If a send is going into silence, the broadcast pauses itself and tells you why. That pacing is exactly what keeps a number from being flagged, and it protects you more than it slows you down. If a message really has to land at once (a webinar link, for example) there is a time-critical toggle that skips the automatic batching, but even then your number's own daily limit is a hard ceiling.

How long it takes depends on which WhatsApp you use. With the official WhatsApp Business API, sends use pre-approved message templates and Meta caps how many unique contacts you can start a conversation with per 24 hours: 250 for an unverified business, 2,000 once verified, then 10,000 and 100,000 as your quality rating stays high and volume grows. So a 10,000 list is roughly a day at the 10,000 tier and 50,000 is several days, or longer while your account is still climbing tiers. As long as people opted in and your template is approved, this is the sanctioned way to message at that scale and it does not get treated as spam. What hurts you is recipients blocking or reporting you, which lowers your quality rating and your tier. With WhatsApp Web (a normal number connected by QR code) it is a different story: a new number starts around 50 messages a day and warms up to about 500 a day over roughly 60 days, and can be pushed manually up to 5,000 a day only once fully warmed up. That channel is not meant for 10,000 message blasts from one number. People who scale it use several numbers plus the API for the first cold touch. Our guide on this is at https://help.dmchamp.com/messaging-channels/scaling-whatsapp-outreach.

For SMS you connect your own Twilio account, and your real throughput and spam risk are decided by your registration there (A2P 10DLC in the US, sender ID or brand registration elsewhere). Registered senders clear thousands a day and are not filtered as spam when you message people who opted in and include an opt-out line. We add spintax variations on SMS and WhatsApp Web broadcasts so a big send does not look like the same text pasted 10,000 times. Full detail on broadcasts and pacing is here: https://help.dmchamp.com/broadcasts/broadcasts