WhatsApp itself: User initiates a conversation with your business, which serves as an implicit opt-in for support messages, and then explicitly opts into marketing messages within the chat.
Once you have opt-ins, store the customer's WhatsApp number and opt-in status in your Customer Relationship Management (CRM) system. Your BSP will connect to your CRM to send messages via the API.
Use Message Templates (HSMs): For any business-initiated messages (e.g., marketing promotions, notifications), you must use pre-approved Message Templates. These are standardized messages approved by WhatsApp to ensure they are not spammy.
Focus on Value and Quality: Deliver whatsapp number list valuable and relevant content to avoid users blocking or reporting your business, which can negatively impact your quality rating and message deliverability.
Buying Phone Number Lists: Illegal, unethical, and will lead to immediate bans on WhatsApp.
Scraping Numbers: Using software to extract numbers from WhatsApp groups or websites. This is a violation of privacy, WhatsApp's terms, and potentially legal regulations like GDPR. Leads to bans.
Sending Unsolicited Messages (Spam): Messaging users who haven't opted in, or sending irrelevant messages, will result in blocks, reports, and account termination.
In summary, "creating a WhatsApp number list" is about building a consent-based, engaged audience for legitimate communication, rather than simply compiling a collection of phone numbers.Collecting WhatsApp numbers legally is paramount for any business aiming to use the platform for marketing, customer service, or notifications. The core principle is explicit, verifiable consent (opt-in) from the user. Failure to comply can lead to WhatsApp account bans, significant fines (e.g., under GDPR), and severe damage to your brand's reputation.