The best replacement for gmail is hotmail.

The best alternatives to gmail are rated as following:
★★★★★  hotmail
★★★★★  yahoo
★★★★  outlook
★★★  yahoo mail
★★  zoho mail
★★  exchange
★★  aol
★  googlemail
★  apple mail
★  icloud
★  mobileme
★  google apps
★  thunderbird
★  ymail
★  search
★  filter
★  office 365
★  mac mail
  yahoo email
  gmail
  yahoo which is better
  email
  fastmail
  email app android
  aol mail
  google mail
  mailbox
  google
  mail app
  me.com
  outlook 2013
  windows live mail
  mobile me
  outlook express
  facebook
  outlook 2010
  inbox
  live
  .mac
  exchange iphone
  microsoft exchange
  htc mail
  mail.app
  cox email
  outlook 365
  yahoomail
  verizon email
  comcast email
  qmail
  exchange server
  yahoo beta

Your alternative for gmail is not listed? Suggest!
Speaking about gmail, one probably shouldn't forget about outlook.

Other search terms related to gmail and their ratings are:
★★★★★ outlook
★★★ thunderbird
★★★ my domain
★★★ outlook 2010
★★★ google plus
★★★ custom domain
★★★ outlook 2013
★★★ google+
★★ domain
★★ apple mail
★★ mac mail
★★ google
★★ outlook 2007
★★ google account
★★ tls
★★ outlook express
★ https
★ password
★ different domain
★ windows mail
★ outlook 2003
★ attachment
★ your domain
★ invite
godaddy
microsoft outlook
msn messenger
exchange
gtalk
You have in mind a companion for gmail and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gmail in all years. Click on graph for more.
gmail
hotmail
yahoo