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Zoho Connect might be a bit more popular than Elgg. We know about 1 link to it since March 2021 and only 1 link to Elgg. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Maybe something like ELGG could be a base depending on your skills. I still was unhappy with that and started down a custom route but stagnated due to the time sink. Source: over 1 year ago
Connect — Team Collaboration free for 25 users with 3 groups, 3 custom apps, 3 Boards, 3 Manuals, 10 Integrations along with channels,events & forums. - Source: dev.to / almost 3 years ago
SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
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