To reassure customers that sharing WhatsApp numbers will be of great value, business-2-consumer interaction must make sure there is privacy and, therefore, a gain of trust. The following is how companies can inspire customers to share their WhatsApp numbers.
Convenience and Personalization
WhatsApp gives way to the ease of use for immediate response. Each business needs to communicate and stress that sharing a WhatsApp number will enhance the customer experience of speedy support, personalized offers, and updates in real time. Clearly, customers are more likely to opt-in if they understand that communication would be relevant to their needs for special discounts, order updates, or personal recommendations.
Grant Exclusive Benefits
Offering incentives can be the strong WhatsApp Number Database move.When encouraging someone to sign up for WhatsApp, give offers or discounts available only to customers on your WhatsApp list. For instance, a customer can be allowed a 10% discount or to access sales much earlier than others, in case of early registration of a WhatsApp number. Most people show positive responsiveness to limited-time offers or rewards for being on the WhatsApp list; hence, ensure higher engagement.

Security and privacy should be the priority.
Privselling of personal contact information, being a big concern, needs to be taken care of by companies in their usage of the WhatsApp number with an assurance that no data of the customers would be sold to any third-party server and also an assurance that there would be no spam messages. There must be clear opt-out options and all means of protection regarding data protection laws. This instills confidence and credibility. A small note on data privacy during sign-up will keep the customer secure about sharing his or her information.
Frictionless Onboarding
Frictionless onboarding is very important. Make it easy to join through an easy form or click-to-chat link on the website or social media. With WhatsApp's "Click to Chat," one can let customers get in contact with businesses without memorizing numbers of businesses, thus making the process frictionless.
Leverage Social Proof
This may well be encouraged by sharing customer testimonials or reviews of customers using WhatsApp for interacting with the business. Highlight positive feedback so that community and trust based on the idea that other customers also benefit from this channel will be guaranteed.