HumHub vs pixiv

HumHub is an open-source intranet and collaboration platform for communication and knowledge sharing. It is intended for company intranets, knowledge bases, project hubs, and customer or partner communities. Built-in tools include personalized dashboards, activity streams, configurable notifications, granular permissions, full-text search, file management, and social interactions. More than 80 optional modules add choices such as News, Messenger, Calendar, LDAP, SAML SSO, surveys, and translation tools. The platform supports private spaces, events, and moderation, with integrations including OnlyOffice, Collabora Online, LDAP, SAML SSO, and a RESTful API. Organizations can host it on their own infrastructure or use managed SaaS on European servers. The maker says its SaaS hosting is GDPR-compliant and uses ISO 27001-certified servers; on-premise users retain data in their own environment. Community Edition is available free under AGPLv3 for self-hosting. Professional Edition is €144 a month, billed monthly, for up to 100 users with SaaS hosting and no onboarding. Networks with 1,000 or more users require a custom quote.

pixiv has no write-up on Specifiction yet; its figures are above.