Gmass Turns your Gmail/Gsuite account into a full email marketing system, It is a Great Service for cold outreach emails. It allows you to schedule, track, and follow emails within your Gmail Account.
A powerful, simplified tool to send emails, create pages and automate your marketing. GetResponse gives you the power to set up Your Sales Funnel, run webinars, build landing pages, generate leads, and automate everything, all from one place.
ConvertKit is a full-featured email service provider (ESP). Thanks to its ease of use, automation and other features, it’s one of the fastest-growing email marketing companies around. It also offers customizable sign-up forms and landing pages to help bring in more email subscribers.