Communifire is a social intranet and enterprise social network created by Axero solutions. Overall, it's a solid company portal with modern interface and social features, albeit priced aggressively (no free plan is available). Communifire falls short in several categories. The project management module is very light, you can add tasks, but not projects, there are no Gantt charts or employee workload management tools. Second, there are no sales or client management tools of any kind. You can't edit documents simultaneously, there are no videoconferencing options or email server integration. More importantly, Communifire has neither Android nor iOS apps. See this feature comparison chart to decide if Bitrix24 is a free Communifire alternative you've been looking for.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.