We hesitated for a long time between various services and tried out trial versions, and ultimately settled on i2crm. Everything works great, and we are pleased with the advanced settings for WhatsApp. The service's pricing pleasantly surprised us; it is significantly lower than that of competitors, plus there is an extended free access option. The support team operates at the highest level, and a special thanks to them! They respond very quickly to all questions and even provided additional free access, which speaks to their high customer orientation. Thank you!