When comparing Taiga vs Checkvist, the Slant community recommends Checkvist for most people. In the question“What is the best cross-platform to-do list app?” Checkvist is ranked 18th while Taiga is ranked 40th.
Ranked in these QuestionsQuestion Ranking
Pro Open source
With access to the source code, savvy users can make under-the-hood tweaks to suit their work style.
Pro Unlimited number of users for free within a single project
Multiple projects require the paid version, which is available for a reasonable price.
Pro Tasks can be managed with custom tags
Pro vim-like commands
Pro Convenient search by text or tag filtering
Pro Converts incoming emails to todos - this is a way to enter tasks from anywhere.
Pro Great search
Search filters help you search for tasks by tag, due date, assignee, etc.
Pro Very flexible
To-do lists often need to be grouped and regrouped for clarity. The outline-based nature of Checkvist makes it easy to move things across categories, to increase and decrease priority, etc.
Pro Smart parsing of items
Parses markdown, html links, hashtags to become formatted text, clickable links, and tags, respectively.
Pro Generous set of free features
Checkvist offers many free features if you are using this individually.
Pro Supports comments on tasks
Any item can have a free-text comment, which can be shown or hidden as desired.
Con Aimed squarely at (semi)professionals
It simply doesn't work as a personal to-do app. Granted, it was never meant to be used as one.
Con Limited capability in the android app
Checkvist is primarily a web interface.