The Best Free Email Clients to Use in 2021 1. Also, we will be reviewing email clients for Android, iOS, and Gmail. Whether you are looking for an email client for your Mac or your Windows 10 PC/laptop, we have you covered. Some clients are specifically designed to make your work experience better by giving you the tools and ability to manage your workflow and to work with teams. You can have an email client for both personal and professional use. Market Share of the Best Email ClientsĪccording to this infographic by Litmus, here are the top 10 email clients used by people around the globe (data from 2019): There are calendars, to-do lists, notepads and checklists, contacts and address books, and many more such online collaboration tools that an email client should provide. Email clients allow you to receive and send emails, but their features are not limited to doing just that. An email client can be very useful if you want to manage multiple accounts through a shared inbox.