How many mail sites are there

There are numerous email services and platforms available, and it's difficult to give an exact number. However, I can provide you with a list of some popular email services and platforms:

  1. Web-based email services:
    • Gmail (Google)
    • Yahoo Mail
    • Outlook.com (Microsoft)
    • AOL Mail
    • ProtonMail
    • Tutanota
    • Mailfence
    • Zoho Mail
    • Yandex Mail
    • Mail.ru
  2. Email clients:
    • Microsoft Outlook
    • Mozilla Thunderbird
    • Apple Mail
    • Microsoft Entourage
    • Eudora
  3. Cloud-based email services:
    • Microsoft 365 (formerly Office 365)
    • Google Workspace (formerly G Suite)
    • Zoho Workplace
    • Rackspace Email
    • Intermedia Email
  4. Email hosting services:
    • Bluehost
    • HostGator
    • GoDaddy
    • 1&1 Ionos
    • DreamHost
  5. Specialized email services:
    • ProtonMail (encrypted email)
    • Tutanota (encrypted email)
    • Mailfence (encrypted email)
    • FastMail (paid email service)
    • Mailbox.org (paid email service)
  6. Social media platforms with email services:
    • Facebook (Facebook Mail)
    • Twitter (Twitter Mail)
    • LinkedIn (LinkedIn Mail)
    • Instagram (Instagram Mail)

This is not an exhaustive list, as there are many more email services and platforms available. According to a report by Radicati Group, there were over 3.9 billion email users worldwide in 2020, and this number is expected to grow to over 4.3 billion by 2025.