The advantage of collecting such a base is that you get the phones

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The cheapest way to collect a base from scratch is parsing. You can parse (that is, automatically collect and systematize) contacts from WhatsApp groups that are similar to yours, and get a list of phone numbers to which you can then send your offer. You can also use this method to get contacts of people who post ads on bulletin boards, buy from online stores, etc. The advantage of collecting such a base is that you get the phones of the target audience that is interested in a similar product line.



You can buy a ready-made base. But you need to bulk sms saudi arabia check it carefully before buying. Even if it is working, you do not know how many more advertisers have sent their offers on it. If you parse contacts, then for the same or less money you will get your base for more accurate requests.



If you are ready to invest more money, then think about targeted advertising in VK. You can set up advertising in groups that offer similar products. But in this case, it will most likely be much easier to invite people not immediately to WhatsApp, but to your group on the social network: it must be created in advance, and it must be interesting.