What are some alternatives?
amoCRM - amoCRM is the world’s first messaging-powered CRM.
Zoho CRM - Flexible CRM for Small Business
Marketing Optimizer - Optimize conversion rates, increase lead-to-close ratio, and resell leads easily. Includes complete WordPress integration.
Insightly - Insightly is the easy, powerful and affordable online Customer Relationship & Project Management Software used by over 400,000 small businesses world wide
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Freshsales - Freshsales is a full-fledged CRM for high-velocity sales teams.