The best replacement for http is https.

The best alternatives to http are rated as following:
★★★★★  https
★★★★  ftp
★★  tcp
★★  www
★  https difference
★  soap
★  https performance
★  socket
★  html
★  rtmp
★  socks proxy
★  tcp ip
★  udp
★  https javascript
★  rest
★  https speed
★  https php
★  https seo
  frame redirect
  ftp download
  rtsp
  imap
  file
  spdy
  pop3
  ftp speed
  rpc
  file transfer protocol ftp
  tcp/ip
  https wiki
  websocket
  ftp performance
  jms
  resource angular
  http www
  http
  ssl
  rmi

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

Other search terms related to http and their ratings are:
★★★★★ www
★★ pussy
★★ username and password
★ tls
★ rpc
You have in mind a companion for http and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of http in all years. Click on graph for more.
http
https
ftp