Mercury is a tool developed primarily for stores, having optimized the process of receiving and issuing orders, refunds and returns. Moreover, it only offers 2 service channels, namely WhatsApp and Facebook Messenger.
Callbell on the other hand focuses on 4 main service channels: WhatsApp, Telegram, Instagram and Facebook Messenger. The service works great for any type of business that receives a large volume of inquiries on a daily basis, and the customer service is excellent.
Price is also an important factor when comparing the two tools, since Mercury is much more expensive than Callbell, thus making it difficult for small and medium-sized businesses to use this tool.