ICQ vs Pidgin

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ICQ
ICQ is an instant messaging computer program. ICQ features include sending text messages, offline support, multi-user chats, free daily-limited SMS sending, resumable file transfers, greeting cards, multiplayer games and a searchable user directory. ICQ alternatives for business are: Slack, Hipachat, Microsoft Teams
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Pidgin
Pidgin (formerly named Gaim) is a multi-platform instant messaging client. It provides the ability to have voice/video conversations using the XMPP protocol (including Google Talk). Further features include support for themes, emoticons, spell checking, and notification area integration.
Comparing ICQ vs Pidgin is like comparing apples to oranges. Because your business is unique and nobody except you can decide, which is better for your company. But we can add some fun to your research and suggest some new comparison parameters.

Ok, now let's compare the UI. Looks like Pidgin has more user-friendly interface than ICQ because it's bigger. At least on our screenshots


To compare the popularity of the solutions we counted how many alternatives people search for each of them on the Internet. And it turns out that ICQ is more popular than Pidgin