AIM (AOL Instant Messenger) is an instant messaging program that uses the OSCAR instant messaging protocol and the TOC protocol to allow registered users to communicate in real time. It was released by AOL in May of 1997.

Yahoo! Messenger is another popular instant messaging program provided by Yahoo!. It is used with a generic "Yahoo! ID" which also allows access to other Yahoo! services, and chat rooms in various categories. it was released on 21 June 1999. It is the first major IM client to feature BUZZing and music-status. Another recently added feature is customized avatars.

Comparison chart

AOL Instant Messenger versus Yahoo Messenger comparison chart
Edit this comparison chartAOL Instant MessengerYahoo Messenger
  • current rating is 2.71/5
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(28 ratings)
  • current rating is 3.59/5
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(27 ratings)
Author/Creator America Online Yahoo! Inc
Latest version available (Windows) 2.4,1.0.2 Build 110 Beta (Pro (Win), (Triton (Win),4.7.1333 (Mac OS X),1.5.286 (Linux (Win),2.5.3 (Mac),1.0.4 (Unix)
Operating systems supported Windows, Windows mobile, Blackberry smartphones Windows, Blackberry
Operating systems not supported Mac X, Mac OS X, Linux, BDS ,Unix Mac X, Mac OS X, Linux, BSD, Unix, Windows Mobile
Encryption Yes No
Protocols AIM and ICQ Windows Live messenger, Yahoo! messenger, Lotus SameTime
Toolkits or SDKs W32 W32, Cocoa, GTK
Built-in games Partial Yes
File transfer Yes Yes
Unicode (UTF-8) Yes Yes
Voice messaging and Mail Yes Yes
Web cam Support Yes Yes
Offline messaging Yes Yes
Message Logging Yes Yes
Themes / skins Yes Yes
Emoticons Yes Yes
Cost Free Free
Licence Clickwrap licence Clickwrap licence
Remote desktop application assistance No No
Whiteboard No Yes (Doodle)
Third party add-ons Yes No
Plugin system Yes Yes
Multi-account support No Yes (with Microsoft Live IDs)

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"AOL Instant Messenger vs Yahoo Messenger." Diffen LLC, n.d. Web. 24 May 2019. < >