The best CRM (Customer Relationship Management) for a startup or business depends on various factors such as the specific needs, budget, and industry requirements. However, there are a few popular CRM options that are commonly recommended for startups due to their user-friendly interfaces, affordability, and scalability. Here are three examples:

1. HubSpot CRM: HubSpot CRM is a widely used and highly recommended CRM solution for startups. It offers a free version that provides essential features such as contact management, email tracking, and deal tracking. HubSpot CRM also integrates seamlessly with other HubSpot tools like marketing automation and customer service, allowing for a comprehensive approach to customer relationship management. The platform is known for its intuitive interface, ease of use, and extensive library of educational resources. Reference: HubSpot CRM - https://www.hubspot.com/products/crm

2. Zoho CRM: Zoho CRM is another popular choice for startups due to its affordability and extensive feature set. It offers a range of plans, including a free version for up to three users. Zoho CRM provides features like lead management, contact management, sales forecasting, and automation. It also integrates with various third-party applications, allowing for seamless data flow between different tools. Zoho CRM is known for its customization options, allowing businesses to tailor the CRM to their specific needs. Reference: Zoho CRM - https://www.zoho.com/crm/

3. Salesforce: Salesforce is a leading CRM provider that offers a comprehensive suite of tools for businesses of all sizes. While it may have a higher price point compared to other options, Salesforce provides advanced features and scalability that can benefit startups as they grow. It offers a wide range of modules, including sales, marketing, customer service, and analytics. Salesforce also has a vast marketplace of third-party integrations, allowing businesses to extend the functionality of their CRM. Reference: Salesforce CRM - https://www.salesforce.com/products/sales-cloud/overview/

It's important to note that the best CRM ultimately depends on the specific needs and goals of your startup or business. It's recommended to evaluate multiple options, take advantage of free trials, and consider factors such as ease of use, scalability, integration capabilities, and customer support before making a decision.