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Trello does 3 jobs: Kanban boards (boards, shared boards with comments and live updates, calendar and timeline views. Most projects replace one or two of them, so pick the job you actually need.
Open-source alternatives to Trello that run locally, allow commercial use and need no paid API include Kanboard (Kanban boards (boards; MIT). WeKan covers all 3 Trello jobs.
Real-time kanban boards with projects, boards, lists, cards and tasks, dark mode, Markdown editor, SSO and board import/export; MIT.
Trello-style kanban boards with workspaces, labels, comments, templates and Trello import; Next.js and PostgreSQL, AGPL-3.0.
Minimal self-hosted kanban board in PHP with WIP limits, subtasks, filters and automatic actions; MIT licensed and in maintenance mode.
Goals-focused project management with kanban, Gantt, table and calendar views, sprints, milestones, timesheets and wikis; PHP and MySQL.
Kanban boards app for Nextcloud with cards, labels, Markdown notes, attachments, comments and sharing; requires a Nextcloud server.
Self-hosted real-time kanban boards with Markdown cards, custom fields, stopwatch and 100+ notification providers; fair-code licence.
Self-hosted task manager with list, kanban, Gantt and table views, shipped as one binary with bundled SQLite; AGPL-3.0.
Long-running MIT kanban board app with swimlanes, calendar, Gantt and table views, Trello import, and Windows, Mac and Linux bundles.
No project meets all of your requirements. The list below shows what you'd need to relax.
We hid them because something is missing, unknown or conflicting. Here's what.
Yes. WeKan, Nextcloud Deck, PLANKA, Vikunja and Kan are free to download and run on your own computer without paid API keys. WeKan covers every job we list for Trello; the others cover only part of it, so check which job you need.
Yes, with WeKan (MIT), Nextcloud Deck (AGPL-3.0-or-later) and Leantime (AGPL-3.0). Check the hardware notes and licence conditions on each page before you start.
Yes, with WeKan (MIT), Nextcloud Deck (AGPL-3.0-or-later) and PLANKA (Custom licence). Check the hardware notes and licence conditions on each page before you start.
Confirmed: 4ga Boards, Kanboard and WeKan. With conditions: Kan, Leantime, Nextcloud Deck, PLANKA and Vikunja. This is not legal advice; read each licence.
WeKan covers every job we list for Trello.