Based on our record, SOGo seems to be more popular. It has been mentiond 1 time since March 2021. 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.
Episode 3, which I will bookmark as it lists the solutions that they have selected. I read e.g. About SOGo and Zorin OS that I didn't know of. Source: about 1 year ago
Roundcube - Web-based IMAP email client
AODocs - AODocs is the document management solution recommended for G Suite. Secure your documents, structure your content, & automate your processes
Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
Docomotion - Docomotion offers tools for designing and generating all types of transactional and operational business documents.
Rainloop - RainLoop is a web based email client.
infoRouter - infoRouter is a EDMS that includes Workflow, Document routing, Electronic Forms, Scanning, Storage, Archiving, Indexing & Records Management