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ConvertKit
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.
GetResponse
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.
Gmass
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.