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OptinMonstero offers online lead generation software which is probably one of the most well-known tools currently on the market. It can be integrated with all the popular CRM and email marketing platforms so you will be able to use both for generating leads and for working with them after that. HubSpot can track your interactions automatically allowing you to be in control of everything you are doing, especially when it comes to sales. Keap allows you to keep all the necessary customer information in just one place.