20 self-hosted Smartsheet alternatives

Open-source Airtable alternative that turns Postgres/MySQL/SQLite into a no-code spreadsheet UI with views, permissions, integrations, and REST APIs.

64.7k stars5k forkslast commit 26 Aug 2026Actively maintained

Huly is an open-source all-in-one platform combining project management, team chat, and collaborative documentation as an alternative to tools like Jira, Linear, Slack, and Notion.

27.5k stars2.1k forksEPL-2.0last commit 11 Aug 2026Actively maintained

Open source project management tool with boards, tasks, templates, and team collaboration—an alternative to Trello, Asana, and Notion.

26.4k stars2.6k forkslast commit 11 Jun 2025Slowing down

Open-source, self-hosted no-code/low-code platform to build internal tools and business applications with a data-model approach, workflows, permissions, and a plugin system.

23.9k stars2.8k forkslast commit 26 Aug 2026Actively maintained

Teable is an Airtable alternative for building database apps with a spreadsheet UI, multiple views, real-time collaboration, and a plugin system, backed by PostgreSQL.

21.7k stars1.3k forkslast commit 29 Jul 2026Actively maintained

WeKan is an open-source Kanban board app with real-time collaboration, boards/lists/cards, access controls, and multiple deployment options like Docker.

21.1k stars3k forksMITlast commit 27 Aug 2026Actively maintained

OpenProject is an open source project management platform for planning, tracking, and collaborating on work with Gantt charts, agile boards, roadmaps, and time reporting.

15.9k stars3.4k forksGPL-3.0last commit 26 Aug 2026Actively maintained

Self-hosted, real-time Kanban board built with React and Node.js; supports collaborative boards, markdown notes, SSO, and flexible notifications.

12.5k stars1.4k forkslast commit 10 Aug 2026Actively maintained

Grist is a modern relational spreadsheet that combines spreadsheet usability with a database-style data model, supporting Python formulas, dashboards, and integrations.

11.6k stars622 forksApache-2.0last commit 24 Aug 2026Actively maintained

Leantime is an open-source, PHP-based project management system combining strategy, planning and execution with Kanban, Gantt, dashboards, wikis, time tracking and AI-assisted features.

11.5k stars1.1k forksAGPL-3.0last commit 15 Aug 2026Actively maintained

Open source Kanban project management tool with boards, tasks, WIP limits, search, and automation, designed for simple self-hosted team workflows.

9.8k stars2k forksMITlast commit 26 Aug 2026Actively maintained

Open-source, self-hostable project management with kanban/list views, GitHub sync, PostgreSQL backend and Docker/Helm deployment options.

8.6k stars716 forksMITlast commit 26 Aug 2026Actively maintained

Baserow is an open-source Airtable alternative to build databases, views, forms, automations, dashboards, and internal apps with an API-first platform.

5.7k stars701 forkslast commit 26 Aug 2026Actively maintained

Kan is an open-source Trello alternative for kanban boards, cards, labels, comments, and team workspaces, with Trello import and self-hosting support.

5.5k stars454 forksAGPL-3.0last commit 24 Aug 2026Actively maintained

Vikunja is an open-source to-do and task management app with projects, sharing, assignments, and multiple views like list, Kanban, Gantt, and table.

5.2k stars642 forksAGPL-3.0last commit 24 Aug 2026Actively maintained

Open-source, self-hosted task and project manager with hierarchical Areas → Projects → Tasks, smart recurring tasks, Telegram and API integrations.

3.3k stars242 forksMITlast commit 21 Aug 2026Actively maintained

Open-source project management and time-tracking platform with tasks, kanban boards, resource planning, time reports and analytics; available as cloud SaaS and self-hosted.

3.2k stars362 forksAGPL-3.0last commit 24 Aug 2026Actively maintained

Open source agile project management tool with Scrum and Kanban boards, issue tracking, backlog planning, and team collaboration features.

2.1k stars520 forksMPL-2.0last commit 13 Oct 2025Slowing down

Corteza is an open-source low-code platform to build CRM-style apps, structured data systems, and automated business workflows with a strong API-first design.

2.1k stars518 forksApache-2.0last commit 8 Jun 2026Actively maintained

Saltcorn is an open-source no-code platform for building database-backed web and mobile applications with a drag-and-drop UI, views, actions, plugins, and theming.

2.1k stars354 forksMITlast commit 23 Aug 2026Actively maintained