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Open Source Social Network vs Elgg: catalog facts
Open Source Social Network	Elgg
Freemium The core is free to download and self-host; some marketplace add-ons and managed setup are…	Free Free and open source.
Self-hosted	Self-hosted
Profiles, groups, photo albums and messaging included out of the box Preconfigured VM image available alongside the zip installer	Granular access control for private networks and intranets Extensive plugin and theme system
Some business add-ons are paid Uses its own license alongside CAL-1.0, so check the terms before redistributing	Building a polished site often needs PHP development Requires a PHP and MySQL server
Self-hosted	Self-hosted
Open source	Open source
License: CAL-1.0	License: GPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.