There are companies and tools that I find particularly good and ones that I enjoy using. I have briefly described each item.
user.com is an excellent tool, combining marketing automation, CRM, newsletter management tool, SMS sending, chat with chatbot functions, website traffic analysis tool and user profiles, A/B testing and many other functions. In addition, all this is interconnected and very easy to integrate with other tools via Google Tag Manager Zapier or API. So you don’t need many different tools. A very big advantage is the versatility of this tool and low costs.