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Avaya Spaces is ranked 13th in Enterprise Social Software while Slack is ranked 3rd in Enterprise Social Software with 7 reviews. Avaya Spaces is rated 0.0, while Slack is rated 8.2. On the other hand, the top reviewer of Slack writes "A clean and efficient communications platform that is good for large teams". Avaya Spaces is most compared with Microsoft Teams and Kamailio SIP Server, whereas Slack is most compared with Symphony, Atlassian Confluence, SharePoint, ChatWork and Microsoft Teams.
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