All alternatives are good but we prefer Pipedrive because of its great customization and most fit for company/business development.
Sleeknote - Set up lead capture forms on your website in minutes. No coding required. Sync your new email leads with your favorite email service provider. Try for free.
Zoho CRM - Omnichannel CRM for Businesses of all sizes
ExitMist - Exit Mist is a new affordable tool for creating professional exit-intent popups.
Insightly - Insightly is the easy, powerful and affordable online Customer Relationship & Project Management Software used by over 400,000 small businesses world wide
Qualzz - Qualzz is a conversion optimization tool that turns your online traffic into sales.
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.