Mumba Cloud is an Australian based collaboration platform. It's not nearly as well-known as its competitors, and detailed Mumba Cloud reviews are hard to come by. Guessing from the sites, Mumba is a social intranet that has some project and document management tools. If you are looking for a free Mumba Cloud alternative, require access to open source code, need a choice between cloud and self-hosted (on-premise) deployment, consider Bitrix24.
Mumba Cloud alternative
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.