An Email Client is an application that you install on your device to allow you to manage your emails (whether the email account was created within the application itself or through a webmail provider). Examples of these are Microsoft Outlook, Apple’s Apple Mail, and Mozilla Thunderbird. Whereas Webmail is your web-based email service provider. You can create an email account directly with them and without even downloading any other applications, such as an email client, you can still manage your emails. Gmail, Yahoo! Mail, and AOL are some examples.