Office alternatives for realtime online collaboration

In an intead to avoid big corporations wherever possible, you might need to find an alternative to MS Office or Google. Locally, the primary option is LibreOffice. In case you can selfhost, Nextcloud is a good option for online realtime collaboration. If you can not selfhost, you might find cryptpad as a full suite helpfull. If a word/docs replacement is all you are looking for, etherpad might do the job.