Discourse vs Elgg

Discourse is community software for hosting discussions, with options to self-host or use managed hosting. It supports private spaces, event hosting, custom domains and moderation tools, and its codebase is freely available on GitHub. The free plan costs nothing and includes unlimited members, 2 staff seats, 500k monthly page views, 20k monthly emails, 10 categories and 5GB storage. Pro costs $100 a month and includes 5 staff seats, 500k monthly page views, 100k monthly emails, unlimited categories and 20GB storage. Business costs $500 a month, with 15 staff seats, priority support, standard migration services and 100GB storage. Enterprise pricing is custom; it includes unlimited staff seats, 1M+ monthly page views, 1.5M+ monthly emails and 200GB+ storage. Enterprise also includes SSO, SAML, enterprise authentication and a 99.9% uptime guarantee. Paid plans have a 14-day trial, and hosting plans require no credit card up front. Integrations include GitHub, chat providers, Zendesk and authentication providers. Support options range from community help to email support and professional services.

Elgg is a free, open-source framework for building web applications where people sign in and share information. It can serve as a foundation for campus networks, organizational collaboration platforms, or company communications tools. Hooks and events let plugins extend or change application behavior, while the view system supports custom themes. Granular content access policies can support private networks and intranets; user groups and a file storage API provide building blocks for managing members and their files. Elgg supports on-site and email notifications, as well as RPC web services for external applications and mobile clients. Its listed security features include anti-CSRF validation, XSS filters, HMAC signatures, and password hashing. The project offers documentation, tutorials, an API reference, community discussions, and a repository with more than 1,000 open-source plugins. It is free to download, install, and use. The full package with core plugins is offered under GPLv2; the framework without plugins is offered under MIT. Self-hosting requires a database and a configured cron job for background tasks.