Pivotal Tracker vs Stack vs Taiga.io

Tracker Story- simple story editing and drag-and-drop prioritization;Velocity and Emergent Iterations- Tracker calculates future iterations automatically, based on historical performance.;Release and Scope Management- Completion dates are calculated automatically, based on velocity - your live measure of historical performance. See impact on scope as new stories are added immediately, and move stories around easily via drag and drop as priorities change.;Simple, Effective Workflow- Jump right into your project with a simple workflow that emphasizes rapid delivery and lots of feedback.;Feedback Loop- A Tracker story is only considered done when accepted by the project's customer. This creates a constant feedback loop, starting in the very first iteration;Focus on MVP- Focus on delivering stories and shipping working software often are tightly woven into the fabric of Tracker.;Visualize Progress- Keep an eye on your project with Tracker's built-in charts, including release burn-down, iteration burn-up, story type breakdown, and historical velocity.;Real-time Collaboration- virtual team room, story comments, attach mockups, organize stories by labels;iOS App- Your backlog, icebox, and other panels are all exactly where you'd expect from using the Pivotal Tracker website.

Customizable Columns;Unlimited Projects;Real-time Task Comments

Open Source. Free. Agile Project Management. We code and design for a living. We’re crazy about Agile; it makes us better at our jobs and our customers love it. We believe in Open Source because we are part of a global community that thrives on sharing creativity and skill. We love our work. And we want to be happy doing it. But the Project Management Tools that are out there weren't making us happy. In fact we hated the whole lot of them. Bloated, slow, ugly to look at and unintuitive, we just couldn't stand the sight of them a moment longer. So we banished them from browsers and built our own dream tool.