ActiveCollab is an established project management vendor with loyal user base and a few features that make it stand apart from most other task and project management solutions. First, like Bitrix24, it has integrated time tracking and client invoicing. Second, like Bitrix24, ActiveCollab is available both in cloud and on-premise. Alas, unlike Bitrix24, ActiveCollab doesn't have a free version, limiting you to a free 30-day trial. If you are looking for a free ActiveCollab alternative, see what features free Bitrix24 accounts have to offer. * Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.