Best tdo Alternatives & Competitors in 2025

A safe place for your notes, thoughts, and life's work.

Key Standard Notes features:

End-to-End Encryption Cross-Platform Support Open Source Extended Features via Subscription

Open Source

Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.

Key OneNote features:

Cross-Platform Accessibility Collaboration Features Integration with Microsoft Ecosystem Flexible Organization

Setuply: Transform Clients into Brand Advocates. An AI-powered, purpose-built platform for client onboarding and lifecycle management, helping B2B teams accelerate revenue recognition, boost retention, and scale operations with confidence.

Key Setuply features:

Project Management Case Management Secure Data Staging Client Impact Control Panel

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Things is an easy to use task manager.

Key Things features:

User Experience Integration with Apple Ecosystem Powerful Task Management Quick Entry

Customizable personal productivity tool .

Key Amazing Marvin features:

Time Tracking Time Blocking Calendar and Scheduler Calendar sync

Open Source paid Free Trial

Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.

Key Wrike features:

Comprehensive Task Management Collaboration Features Customizable Dashboards Integration Capabilities

The #1 monitoring employee software for clear insights into how your team works. Get real-time and historical data. Understand productivity at every level.

Key Insightful.io features:

Productivity Time Tracking Time & Attendance Tracking Monitoring

Try for free paid Free Trial $6.4 / Annually (per employee per month (billed annualy))

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor. .

Key Joplin features:

Open Source Cross-Platform End-to-End Encryption Rich Text Support

Open Source free