Mozilla Thunderbird
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About
Mozilla Thunderbird is ranked #38 of 188 in calendar apps on Inferse, made by Mozilla Thunderbird. It runs on Android, Linux, macOS, Windows. There is a free plan.
Compared on calendar apps
- Free plan
- Yesthunderbird.net
- Mobile apps
- Androidthunderbird.net
Facts
- Free plan
- Yesthunderbird.net · 21 Sept 2026
- Unified inbox
- Yesthunderbird.net · 21 Sept 2026
- Offline access
- Yesthunderbird.net · 21 Sept 2026
- Scheduled sending
- Yesthunderbird.net · 21 Sept 2026
- Calendar tools
- Yesthunderbird.net · 21 Sept 2026
- Free Forever
- Thunderbird is available free forever.thunderbird.net · 27 Sept 2026
- Open Source
- Thunderbird is open source and freely licensed to use, modify, and share.thunderbird.net · 27 Sept 2026
- Desktop Platforms
- The desktop app supports Windows, Linux, and macOS.thunderbird.net · 27 Sept 2026
- Mobile Platform
- Thunderbird Mobile is an open-source email app for Android.thunderbird.net · 27 Sept 2026
- Email Management
- Users can manage multiple email accounts separately or in a unified inbox.thunderbird.net · 27 Sept 2026
- Productivity Tools
- Thunderbird includes calendar, contacts, and task management.thunderbird.net · 27 Sept 2026
- Ad Free
- Thunderbird does not clutter the inbox with ads or commercials.thunderbird.net · 27 Sept 2026
- Donation Funded
- Thunderbird is funded by user donations and says it does not sell inbox ads.thunderbird.net · 27 Sept 2026
- Privacy And Security
- Thunderbird says privacy and security are prioritized as part of Mozilla.thunderbird.net · 27 Sept 2026
- Code Review
- Its open-source code has been reviewed and improved over 20 years.thunderbird.net · 27 Sept 2026
- Customizable Interface
- The interface is customizable for different workflows and visual preferences.thunderbird.net · 27 Sept 2026
- Third Party Add-ons
- Thunderbird supports a third-party add-on ecosystem.thunderbird.net · 27 Sept 2026
- Support Resources
- Users can find desktop and mobile help, support, and getting-started resources.thunderbird.net · 27 Sept 2026
- Community Support
- Contributors around the world help users and support the project.thunderbird.net · 27 Sept 2026
- Operating Entity
- Thunderbird is part of MZLA Technologies Corporation, owned by Mozilla.org.thunderbird.net · 27 Sept 2026
- Language Options
- The site provides a broad selection of page languages.thunderbird.net · 27 Sept 2026
Company
- Founded
- 2003thunderbird.net · 28 Sept 2026
Best Mozilla Thunderbird alternatives
See all 12
8.9 Calendar.com $20/mo first paid tier Free plan 
7.9 EGroupware €21.90/mo first paid tier Free trial Open source
7.6 Google Calendar $7/mo first paid tier 
7.5 Microsoft Outlook Calendar $1.67/mo first paid tier 
7.5 Reclaim AI $0.83/mo first paid tier Free plan 
7.5 7shifts Free free plan, no paid price published Free plan 
Where it ranks on Inferse
- Best Calendar Apps in 2026#38 of 188
- Best Email Clients in 2026#1 of 139
Sources
- thunderbird.net/en-GB/· checked 21 Sept 2026
- thunderbird.net· checked 27 Sept 2026
- thunderbird.net/en-GB/desktop/· checked 27 Sept 2026