Mailchimp is the gold standard for the marketing automation market as one of the most powerful and versatile tools out there. With Mailchimp, you can easily build targeted campaigns, newsletters, landing pages, complex automation workflows, and much more.
Copper, the CRM built for Google Apps, offers native integration with G Suite to increase sales productivity. With features including sales pipeline progression reports, automated profile enrichment and sales forecasting, Copper is designed to eliminate the busy work to let you focus on building better business relationships.
PieSync offers the only solution in the market to keep your customer data in sync two-ways and in real time, processing new entries as well as historical data. Your contacts are kept in sync automatically, so you don't need to worry about it once the configuration is set up.