Optimum online email address book

Here are some of the most popular and highly-regarded online email address books:

  1. Gmail Contacts: Google's email service, Gmail, has a built-in contact manager that allows you to store and organize your contacts. You can also sync your contacts across multiple devices.
  2. Microsoft Outlook Contacts: Microsoft Outlook's contact manager allows you to store and manage your contacts, including phone numbers, email addresses, and notes.
  3. Zoho Contacts: Zoho's contact manager is a free online service that allows you to store and manage your contacts, including phone numbers, email addresses, and notes.
  4. HubSpot Contacts: HubSpot's contact manager is a free online service that allows you to store and manage your contacts, including phone numbers, email addresses, and notes.
  5. Contactually: Contactually is a popular online contact manager that allows you to store and manage your contacts, including phone numbers, email addresses, and notes.
  6. Freshsales: Freshsales is a sales CRM that also includes a contact manager, allowing you to store and manage your contacts, including phone numbers, email addresses, and notes.
  7. Pipedrive: Pipedrive is a sales CRM that also includes a contact manager, allowing you to store and manage your contacts, including phone numbers, email addresses, and notes.
  8. Contactually: Contactually is a popular online contact manager that allows you to store and manage your contacts, including phone numbers, email addresses, and notes.
  9. Cirrus Insight: Cirrus Insight is a contact manager that integrates with your Gmail or Outlook account, allowing you to store and manage your contacts, including phone numbers, email addresses, and notes.
  10. Streak: Streak is a contact manager that integrates with your Gmail account, allowing you to store and manage your contacts, including phone numbers, email addresses, and notes.

When choosing an online email address book, consider the following factors:

  1. Ease of use: How easy is it to add, edit, and manage your contacts?
  2. Integration: Does it integrate with your email client or other apps you use?
  3. Features: Does it offer features such as contact grouping, tagging, and search?
  4. Security: Is your data secure and backed up regularly?
  5. Scalability: Can it handle a large number of contacts?
  6. Cost: Is it free or does it require a subscription or payment?
  7. Customization: Can you customize the layout and fields to fit your needs?

Ultimately, the best online email address book for you will depend on your specific needs and preferences.