The best open source alternative to Smartsheet is Redmine. If that doesn't suit you, our users have ranked more than 100 alternatives to Smartsheet and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Smartsheet are Teable, Baserow, OpenProject and Kaneo.
Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database.
Teable is a super fast, real-time, professional, developer friendly, no-code database built on Postgres. It uses a simple, spreadsheet-like interface to create complex enterprise-level database applications.
Baserow is the secure, open-source platform for building databases, applications, automations, and AI agents — all without code. Trusted by over 150,000 users, Baserow delivers enterprise-grade security with GDPR, HIPAA, and SOC 2 Type II compliance, plus cloud and self-hosted...
Open source software that enhances team collaboration and productivity through features like Gantt charts, issue tracking, Scrum support, and document management. Supports classic, agile, or hybrid management styles while ensuring robust data protection and flexible task assignment.
Open source project management platform offering kanban boards, team collaboration with real-time updates and comments, timeline tracking, automation, full customization, MIT licensing, data privacy with end-to-end encryption, self-hosting, and community-driven development.
GanttProject is a cross-platform desktop tool for project scheduling and management. It runs on Windows, Linux and MacOSX, it is free and its code is opensource. What can it do?
ProjectLibre is a Java-based project management solution that gives Microsoft Project a run for its money. Offering a UI similar enough to ease the transition from Microsoft's market leader, ProjectLibre packs in calendars, resource tracking, task management, and...
Leantime is the project management system for non-project managers. It is a people-first project management system designed specifically for neurodivergent minds. Unlike traditional tools built for neurotypical users, Leantime combines behavioral science, AI, and a...
Undb is a local-first, offline-first no-code platform that empowers you to build and manage your own databases with ease. Start creating your type-safe APIs and manage your data securely. An Airtable alternative.
Adaptive suite integrating project, IT service, and source code management for technology teams, featuring time tracking, issue and document management, customizable dashboards, third-party integration, agile and waterfall support, and cloud deployment options.
This open-source tool offers a spreadsheet-like interface for managing and collaborating on Postgres data. With Docker installation, it maintains data privacy using native Postgres access control, and supports complex data setups for seamless workflow integration, all without coding.
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Redmine is based around software development, Smartsheet was designed to handle anything.