When comparing Blossom vs Kanbanize, the Slant community recommends Kanbanize for most people. In the question“What are the best online Kanban boards?” Kanbanize is ranked 8th while Blossom is ranked 16th. The most important reason people chose Kanbanize is:
This widget on the main dashboard can help you measure your process efficiency as a real metric of your team's success.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Slack integration
An update is posted to the Slack channel every time a task is created, completed, moved, or commented upon.

Pro Simple & clean interface
Design focuses on clarity.
Pro Process efficiency widget
This widget on the main dashboard can help you measure your process efficiency as a real metric of your team's success.
Pro Support for runtime policies
Runtime policies are automations that make manual recurring processes automatic on the Kanban board. For example; every friday make a card with title XX and deadline XX on board XX.
Pro Portfolio Kanban
The initiatives lane, automated status updates for projects and campaigns, cross-board work links and convenient work breakdown mechanism
Pro Integrations
E-mail integration serves great work, plus the software has integrations with Slack, Jira, GitHub and many others.
Pro Great support for flow analytics
Pro It is a useful tool to separate work by some characteristic, be it priority, functional area or anything else
Cons
Con No free plan
There is no free plan like for personal use and the minimal cost of $19/month might be prohibitive.
Con Slack integration is really basic
There is no way to interact with tasks in any way - new tasks can't be added, completed tasks can't be removed, tasks can't be assigned, etc. The integration only sends updates to the Slack channel. There is also no way to fine-tune what updates get posted to Slack.
