Trello

Trello is a visual project management application headquartered in New York, NY, and owned by Atlassian. It was founded in 2011 by Fog Creek Software, spun out as an independent company in 2014, and acquired by Atlassian in January 2017 for approximately $425 million. The product is built around a Kanban-style board-and-card interface that allows teams to track tasks and workflows.

Trello's core product organizes work into boards, lists, and cards, which users can customize with labels, due dates, attachments, checklists, and comments. It supports Power-Ups — integrations with third-party tools such as Slack, Google Drive, and GitHub — as well as automation via its built-in Butler feature. The platform is used across a wide range of industries for personal task management, team collaboration, and lightweight project tracking.

Atlassian acquired Trello in 2017 as part of its broader portfolio of collaboration and productivity tools, which includes Jira, Confluence, and Bitbucket. At the time of acquisition, Trello reported approximately 19 million registered users. The product operates on a freemium model, with paid tiers — Standard, Premium, and Enterprise — offering additional features and administrative controls.