Who each tool is really for
Insightly
Insightly positions itself as a CRM that does not stop at the closed deal. The distinctive idea is continuity: the opportunity you won becomes the work you deliver, held in the same system with the same client record. That appeals to professional services firms, agencies and project-based businesses where the people who sell are often the people who deliver, and where a lost handover is a client-facing problem rather than an internal one.
Zoho CRM
Zoho CRM positions itself as the sales application inside an unusually broad software family covering finance, support, marketing, analytics and more. The pitch is consolidation across functions and one vendor relationship. It appeals to businesses that expect to adopt several applications over time and prefer to standardise rather than integrate.