MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Clearbit - Clearbit provides Business Intelligence APIs
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.